The 2ndAnnual Cannabis Labs Virtual Conference is set to take place on Tuesday, April 2, 2019, starting at 12:00 Noon and concluding at 4:00 PM EDT. This complimentary series of webinars will take a deep dive into a variety of subjects related to cannabis testing and the laboratory industry.
The virtual event will help attendees better understand some of the more technical aspects of starting and operating a laboratory. Topics discussed will include pesticide testing, cannabinoid and terpene testing, the new ISO 17025:2017 accreditation and a lesson in starting a laboratory in a new market.
Attendees registering for this complimentary series of webinars will get access to four veterans of the cannabis lab testing industry, who are available for Q&A after each presentation. In addition to getting the opportunity to chat with these subject matter experts on April 2, a recording of the presentations will be made available to all who register.
Charles Deibel, President & CEO – Deibel Labs, Inc.
Here is a snapshot of the agenda:
Pesticide Testing: Methods, Strategies & Sampling Charles Deibel, President & CEO – Deibel Labs, Inc.
Pesticides represent the number one area for batch failures in the US cannabis market. These are concerns not only for consumers, but are a very big concern for cultivators and manufacturers of cannabis products. remediation of the pesticides, once they are in the product are not always feasible From the lab level, they are also the hardest test to run in the laboratory, even one equipped with state-of-the-art equipment. The best instruments on the market are very expensive and there are no standardized methods, meaning lab to lab variability has happened.
What are the pesticides in cannabis and are there any that are the “main concerns” or ones that stand out as particularly damaging?
What is a basic breakdown of the testing and methods used for pesticide testing?
What are the best strategies for the sampling of cannabis products?
Chris Martinez, Co-Founder & President, EVIO Labs FL
Building a Lab in an Emerging Market Chris Martinez, Co-Founder & President, EVIO Labs FL
Will present a discussion of the genesis of EVIO Labs Florida, how to start a lab in a new market
Challenges in how we navigated changing regulations in a state with newly legalized cannabis
Expanding a lab to a second location – logistics, hiring, training, consistency.
Dr. Cindy Orser, Chief Science Officer, Digipath Labs
Appreciation of “measurement uncertainty” in cannabis testing
Dr. Cindy Orser, Chief Science Officer, Digipath Labs
Standardization of testing methods is a high priority
Terpenes are the distinguishing chemicals in cannabis sensory perception and chemotaxonomy
Benefits of Accreditation to the ISO 17025:2017 Standard Jane Weitzel, Independent Consultant
The ISO/IEC 17025:2017 standard is now being used to accredit cannabis testing laboratories. From this presentation you will learn the key new aspects of the standard. This includes risk-based thinking. Many aspects of this risk approach require the use of measurement uncertainty. This means the measurement uncertainty must be adequately evaluated. You will be introduced to evaluating and using measurement uncertainty.
The 2017 standard emphasizes conflict of interest and impartiality. Procedures and practices to achieve impartiality will be shown. This reduces the risk of potentially damaging leaks of information or the risk of people not working to the best interests of the laboratory and its clients.
Jane Weitzel, Independent Consultant
The 2017 standard is a valuable and useful business tool that can save the laboratory resources, effort and money. Are you doing too much testing? Are you doing too little testing? When you evaluate the measurement uncertainty you can use it to learn the steps in your test method that need enhancement to reduce the risk of making mistakes. You can also use the measurement uncertainty to focus on the significant steps and stop wasting time on steps and activities that are insignificant.
These benefits of laboratory accreditation will be demonstrated with examples from the cannabis industry.
According to a press release published earlier this week, PathogenDx, Inc., is expanding their product portfolio and doing some rebranding. The DNA-based pathogen detection testing provider, headquartered in Scottsdale, Arizona, produces microarray testing platforms for the cannabis, agriculture and food and beverage industries. Their rapid testing technology can reportedly identify and detect 50+ pathogens all in a single test, including common pathogens such as E. Coli, Salmonella and Aspergillus.
DetectX – Tests for the presence of pathogenic microbial organisms down to a single organism, at less than 0.1 CFU/gram for state regulated compliance. Test 96 or more samples a day for multiple state mandated microbial pathogens, with product safety certainty delivered in 6 hours, far more rapid than current industry standards of 72 hours or more.
QuantX – The world’s first quantification microarray test for Cannabis. This test measures the microbial load in a sample, while also providing discrimination of the organism content relative to testing standards. Regulatory agencies will now have the opportunity to improve microbial testing standards to ensure safety.
EnviroX – With a single swab, one can identify 50+ species and classes of microbes, with quick-turn results, by simply swabbing a grower/cultivation facility surfaces and vents. Submit, identify, and remediate. It’s that simple to mitigate risk to high-value crops.
PhytoX – Coming in Summer of 2019,PathogenDx will introduce the ultra-rapid, easy plant pathogen test to detect powdery mildew, gray mold, mites and other microbial bugs that can become destructive threats to one’s crop. Acquire results in 6 hours to intercept and redress infestation that can destroy one’s yield.
According to CEO and Co-Founder Milan Patel, they want their technology to set the standard for product safety testing. “We’re making the accurate testing of cannabis, food and agriculture faster, more definitive and less expensive with trackable results benefitting growers, producers, regulators and consumers worldwide,” says Patel. “Our new brand is inspired by our unique microplex array and is bright, fresh, memorable and expansive, enabling us to move from cannabis only to much larger global consumable markets where we can continue to offer new products and applications for the technology.”
AOAC INTERNATIONAL is an independent, third party, not-for-profit association and voluntary consensus standards developing organization. Founded in 1884, AOAC INTERNATIONAL was originally coined the Association of Official Agricultural Chemists. Later on, they changed their name to the Association of Official Analytical Chemists. Now that their members include microbiologists, food scientists as well as chemists, the organization officially changed its name to just AOAC INTERNATIONAL.
Much of AOAC’s work surrounds promoting food safety, food security and public health. Their work generally encompasses setting scientific standards for testing methodology, evaluating and adopting test methods and evaluating laboratory proficiency of test methods. The organization provides a forum for scientists to develop microbiological and chemical standards.
In December of 2018, they appointed Dr. Palmer Orlandi as deputy executive director and chief science officer. Dr. Orlandi has an extensive background at the U.S. Food and Drug Administration (FDA), serving the regulatory agency for more than 20 years. Most recently, he was the CSO and research director in the Office of Food and Veterinary Medicine at the FDA. He earned the rank of Rear Admiral and Assistant Surgeon General in 2017.
Dr. Palmer Orlandi is the new Deputy Executive Director and Chief Science Officer at AOAC.
Where It All Began With Cannabis
As recently as three years ago, AOAC began getting involved in the cannabis laboratory testing community, with a working group dedicated to developing standard method performance requirements for AOAC Official MethodsSM for cannabis testing. We sat down with Dr. Palmer Orlandi and a number of AOAC’s leaders to get an update on their progress working with cannabis testing as well as food security and food fraud.
According to Scott Coates, senior director of the AOAC Research Institute, they were approached three years ago to set up a working group for cannabis testing. “We created standards that we call the standard method performance requirements (SMPR®), which are detailed descriptions of what analytical methods should be able to do,” says Coates. “Using SMPRs, we issued a series of calls for methods and looked for methods that meet our standards. So far, we’ve completed four SMPRs- cannabinoids in plant material, cannabinoids in plant extracts, cannabinoids in chocolate (edibles), and one for pesticides in cannabis plant material.” AOAC doesn’t develop methods themselves, but they perform a comprehensive review of the methods and if they deem them acceptable, then the methods can be adopted and published in the AOAC compendium of methods, the Official Methods of Analysis of AOAC INTERNATIONAL.
Deborah McKenzie, senior director of Standards and Official Methods at AOAC
Deborah McKenzie, senior director of Standards and Official MethodsSM at AOAC, says the initial working group set the stage for really sinking their teeth into cannabis testing. “It started with methods for testing cannabinoids in plant dried material and plant extract,” says McKenzie. “That’s where our previous work has started to mold into the current effort we are launching.” McKenzie says they are looking forward to getting more involved with methods regarding chemical contaminants in cannabis, cannabinoids in various foods and consumables, as well as microbial organisms in cannabis. “We are pretty focused on testing labs having reliable and validated analytical solutions as our broad goal right now.”
Moving Forward, Expanding Their Programs
Coates says the work they’ve done over the past few years was more of a singular project, developed strictly for creating standards and to review methods. Now they are currently developing their Cannabis Analytical Science Program (CASP), which is expected to be an ongoing program. “We are looking to fully support the cannabis analytical community as best we can, which will potentially include working on reference materials, proficiency testing, education, training and ISO 17025 accreditation, all particularly as it applies to lab testing in the cannabis industry,” says Coates. “So, this CASP work is a much bigger and broader effort to cover more and to provide more support for labs doing the analysis of cannabis and its constituents, as well as hemp.”
According to Dr. Orlandi, they want this program to have a broad reach in the cannabis testing community. “As Scott pointed out, it’s not just strictly developing standards and methods,” says Dr. Orlandi. “It is going to be as all-encompassing as possible and will lead to training programs, a proficiency testing program and other areas.” Arlene Fox, senior director of AOAC’s Laboratory Proficiency Testing Program, says they are actively engaging in proficiency testing. “We are in the process of evaluating what is out there, what is possible and what’s needed as far as expanding proficiency testing for cannabis labs,” says Fox.
Regulatory Challenges & Obstacles
The obvious roadblock to much of AOAC’s work is that cannabis is still considered a controlled substance. “That creates some challenges for the work that we do in certain areas,” says Dr. Orlandi. “That is why this isn’t just a one-year project. We will work with these challenges and our stakeholders to address them.” AOAC had to put some limits on participation- for example, they had to decide that they cannot look for contributions or collaborations with producers and distributors, so long as cannabis is still a Schedule I controlled substance in the US.
Arlene Fox, senior director of AOAC’s Laboratory Proficiency Testing Program
Muddying the waters even further, the recent signing of the Farm Bill puts a clear distinction between most types of cannabis and industrial hemp. David Schmidt, executive director of AOAC realizes they need to be realistic with their stakeholders and in the eye of federal law.
While scientifically speaking, it’s pretty much the same plant just with slightly different chemical constituents, AOAC INTERNATIONAL has to draw a line in the sand somewhere. “As Palmer suggests, because of the Farm Bill being implemented and hemp being defined now as a legal substance from a controlled substance standpoint, industrial hemp has been given this exclusion,” says Schmidt. “So, we are trying to be realistic now, working with our stakeholders that work with hemp, trying to understand the reality of the federal law. We want to make clear that we can meet stakeholder needs and we want to distinguish hemp from cannabis to remain confident in the legality of it.” Schmidt says this is one of a number of topics they plan on addressing in detail at their upcoming 9thannual 2019 Midyear Meeting, held March 11-14 in Gaithersburg, Maryland.
Uniformity in Methodology: The Future of Cannabis Testing
Dr. Orlandi says his experience at the FDA has prepared him well for the work being done at AOAC. “The role that I served at the FDA prior to joining my colleagues here at AOAC was very similar: And that is to bring together stakeholders to accomplish or to solve a common problem.” Some of their stakeholders in the CASP program include BC Testing, Inc., the Association of Food and Drug Officials (AFDO), Bia Diagnostics, Bio-Rad, Industrial Laboratories, Materia Medica Labs, PerkinElmer, R-Biopharm AG, Supra R & D, TEQ Analytical Laboratories, Titan Analytical and Trilogy Analytical, among others.
David Schmidt, executive director of AOAC
“The underlying reason behind this effort is to create some level of harmonization for standards and methods,” says Dr. Orlandi. “They can be used in the near future to stay ahead of the curve for when regulatory agencies become involved. The idea is that these standards for analytical methods will already be established and as uniform as possible.”
When comparing cannabis to other industries in the US, Scott Coates mentions that most standards are signed off by the federal government. “When we started looking at pesticides in cannabis, it became really clear that we have a number of states doing things differently with different limits of quantification,” says Coates. “Each state, generally speaking, is setting their own standards. As Palmer was saying, one thing we are trying to do with this CASP program eventually will be to have some harmonization, instead of 30 different states having 30 different standards and methods.” So, on a much broader level, their goal for the CASP program is to develop a common set of standard methods, including hemp testing and even the Canadian market. “Hopefully this will be an international collaboration for standards for the methodology,” says Coates. They want to create a common set of standards, setting limits of quantification that will be accepted internationally, that will be accurate and repeatable and for the entire cannabis industry, not just state by state.
Food Authenticity & Fraud
One of the other activities that AOAC just launched recently is the food authenticity and fraud program. As the name implies, the goal is to start developing standards and methods and materials to look at economically adulterated foods, says Dr. Orlandi. That includes non-targeted analyses looking at matrices of food products that may be adulterated with an unknown target, as well as targeted analytes, identifying common adulterants in a variety of food products. “One example in the food industry is fraudulent olive oil,” says Dr. Orlandi. “Honey is another commodity that has experienced adulteration.” He says that in most cases these are economically motivated instances of fraud.
To say that there has been explosive growth in the cannabis edibles market is an understatement. In the next 5 years, edibles are expected to become a $5.3 billion industry according to the Brightfield Group, a cannabis market research firm. Skyrocketing demand for cannabis infusion in food and beverage products, both recreational and medical, has prompted concern for the health and safety of consumers due to the lack of federal legality and regulatory guidelines for these products. Edibles consumers assume the same level of safety and quality present in other food and beverage products in the market. Progressive cannabis operations are opting to follow current food safety guidelines to mitigate hazards despite not being legally required to do so. Utilizing these guidelines, as well as incorporating an industry-specific ERP solutionto automate processes, enables cannabis businesses to provide quality, consistent products and establish standards to support the eventuality of federal cannabis legalization.
Edibles consumption has grown not only in a recreational capacity but also for medicinal use to treat chronic pain, relieve epilepsy symptoms, decrease nausea, combat anxiety and other health issues. Cannabidiol (CBD) infused products take many forms including candies, baked goods, chocolate, oils, sprays, beer, soda, tea and coffee. Their popularity is partly due to their more socially acceptable use, creating an appeal to a wider audience. While the Food and Drug Administration (FDA) is responsible for overseeing food and beverage safety for products sold in the United States, their regulations are not enforced in the cannabis-infused marketplace. Without federal regulatory standards, there exist inherent food safety concerns that create risks to consumers. The average cannabis edibles customer is likely unaware of the “consume at your own risk” nature of the products.
The structure of cannabidiol (CBD), one of 400 active compounds found in cannabis.
There are many consequences of not addressing food safety hazards, as the possibility of food-borne illnesses resulting from unsafe and unsanitary manufacturing facilitieshave become increasingly likely in an unregulated market. In addition to these concerns, problems particular to cannabisgrowing and harvesting practices are also possible. Aflatoxins (mold carcinogens) on the cannabis bud, pesticide residue on plants, pest contamination, improper employee handling and training and inaccurate levels of CBD all contribute to the risk of outbreaks, hefty fines, recalls or business closure. To mitigate the risk of exposure, it is recommended that edible manufacturers employ a proactive approach of observing proper food safety standards that encompass the growing, manufacturing, packaging, handling, storing and selling of products. With a focus on safety, cannabis edible manufacturers utilizing an ERP solution and vendor with experience in food safety management will reap the benefits that food and beverage businesses have experienced for decades.
Following established food safety protocols and guidelines of the food and beverage and dietary supplement industry, allows manufacturers of cannabis-infused edibles to implement a proactive approach by focusing on safety and reducing the risk to their operations. Food and beverage manufacturing best practices include: maintaining supplier list, quality control testing, sanitary handling of consumables, maintaining clean facilities and mitigating cross-contamination. Successful food and beverage manufacturers also incorporate a food safety team, preventative controls, and a food safety plan (FSP) including a detailed recall plan into their safety initiatives.
Establishing and maintaining a supplier list with approved quality ingredients is an essential building block for reducing food safety hazards and can be easily maintained within an ERP. Documentation of vendor information and recording of stringent testing results ensures that specific quality standards are met. Conducting extensive research regarding the source of the ingredients for use in cannabis edibles allows companies to confirm that raw ingredients were processed in a safe environment. The importance of supply chain visibility cannot be understated, as suppliers are in control of potential hazards. Quality processes and regularly performed testing is automated through the workflow of an ERP solution in the manufacturing facility – enabling noncompliant raw materials to be quarantined and removed from production. The ERP solution allows for management of critical control points to catch non-compliance issues and set-up of alternate suppliers in case of supplier-related issues. Maintaining approved supplier lists is an industry best practice that provides current and accurate information in the event of possible consumer adverse reactions.
Following current Good Manufacturing Practices (cGMPs) should underlie efforts to address food safety concerns in the cannabis edibles industry. An ERP solution assists with documenting these quality initiatives to ensure the safe and sanitary manufacturing, storage and packaging of food for human consumption. This includes evaluating equipment status, establishing cleaning and sanitation procedures and eliminating allergen cross-contamination. Employee training is conducted and documentation maintained in the ERP solution to ensure hygienic procedures, allergen awareness, illness reporting and required food or cannabis handling certifications.
Cannabis businesses can benefit from establishing a food safety team tasked with developing a Hazard Analysis Critical Control Points (HACCP) plan to provide effective procedures and protect consumers from the hazards inherent in edible cannabis products – including biological, chemical and physical dangers. Automating processes within an ERP solution prevents and controls hazards before food safety is compromised. Since HACCP plans have historically been used by food and beverage manufacturers to ensure a safe product for the consumer, cannabis edibles manufacturers can apply the lessons from these food safety protocols and procedures in their initiatives.By utilizing food safety best practices partnered with an ERP solution, cannabis businesses can avoid the negative consequences resulting from failure to address food safety hazards in manufacturing, storage and packaging.
A comprehensive FSP, as required by the FDA’s Food Safety Modernization Act (FSMA), identifies food safety hazards and guides the development of a company-specific, validated plan. This plan documents processes throughout the manufacturing, processing, packaging and storage stages of the operation. ERP software provides real-time, forward and backward lot traceability from seed-to-sale with the ability to track materials, document recipes and accurately label products. This detailed level of traceability provides an automated system that implements and documents food safety policies throughout the manufacturing process. With a trained Preventative Control Qualified Individual (PCQI) implementing the FSP, preventative controls, recall plans and employee training records are maintained in an integrated system.
The cannabis market’s tremendous growth has driven edibles manufacturers to follow the same guidelines as mainstream food and beverage companies to ensure safety is afforded equally to consumers of cannabis edibles. By utilizing food safety best practices partnered with an ERP solution, cannabis businesses can avoid the negative consequences resulting from failure to address food safety hazards in manufacturing, storage and packaging. At the end of the day, it’s up to cannabis manufacturers to be proactive in ensuring cannabis edibles are safe to consume until regulations are mandated.
According to a press release published today, Emerald Scientific awarded PerkinElmer five badges for The Emerald Test, a bi-annual Inter-Laboratory Comparison and Proficiency Test (ILC/PT) program. Awarding the badges for Perkin Elmer’s instruments and testing methods affirms their ability to accurately detect pesticides, heavy metals, residual solvents, terpenes and potency in cannabis.
According to Greg Sears, vice president and general manager of Food, Chromatography & Mass Spectrometry, Discovery & Analytical Solutions at PerkinElmer, they are the only instrument manufacturer to receive all five accolades. “To date, PerkinElmer is the only solutions provider to successfully complete these five Emerald Scientific proficiency tests,” says Sears. “The badges underscore our instruments’ ability to help cannabis labs meet the highest standards available in the industry and effectively address their biggest pain point: Navigating diverse regulations without compromising turnaround time.”
The instruments used were PerkinElmer’s QSight 220 and 420 Triple Quad systems, which are originally designed for accurate and fast detection/identification of “pesticides, mycotoxins and emerging contaminants in complex food, cannabis and environmental samples,” reads the press release. They also used their ICP-MS, GC/MS and HPLC systems for the badges.
PerkinElmer says they developed a single LC/MS/MS method using their QSight Triple Quad systems, which helps labs test for pesticides and mycotoxins under strict regulations in states like California and Oregon. They performed studies that also confirm their instruments can help meet Canada’s testing requirements, which set action limits nearly 10 times lower than California, according to the press release.
According to a PJLA client spotlight, MML is a female-owned business with two generations of family-run business experience. Before they took the plunge into medical cannabis testing, MML started out testing in public water systems in Montana. They have since expanded their regimen of testing services to offer a host of other services, but most recently adding compliance testing for medical cannabis and cannabis related products.
The Mission Mountain Labs team
According to Kimberly Nuccio, president of MML, this accreditation allows them to grow their business considerably. “Accreditation has opened greater opportunities for business growth by attracting larger companies that are looking for reassurance that a laboratory follows the highest testing standards,” says Nuccio. “Being an accredited lab gives them that added confidence necessary when deciding which lab to partner with for their testing needs. Mission Mountain Laboratories is the first Medical Marijuana Lab to achieve ISO accreditation in the state of Montana, and PJLA accreditation helped expand us into the new arena of Medical Marijuana compliance testing.”
MML has plans to expand their operations greatly, including opening a location in Florida by 2020. “We are aware of the increased and urgent demand for quality Cannabis compliance testing nationwide and are currently working on a 3-year plan to expand into Florida and several other states to fill this void,” says Nuccio. “These new locations will also be equipped to provide full service testing for Nutraceuticals, Food manufacturing, and Environmental businesses.”
Editor’s Note: The following is based on research and studies performed in their Santa Cruz Lab, with contributions from Mikhail Gadomski, Lab Manager, Ryan Maus, Technical Services Analyst, Dr. Laurie Post, Director of Food Safety & Compliance, Andy Sechler, Lab Director, Toby Astill, Senior Business Development Leader at Perkin Elmer and Charles Deibel, President of Deibel Cannabis Labs.
Pesticides represent the leading cause of batch failures in the cannabis industry. They are also the hardest tests to run in the laboratory, even one equipped with state-of-the-art equipment. The best instruments on the market are HPLC and GC dual mass spectrometer detectors, called “HPLC-qqq”, “GC-qqq,” or just triple quads.
As non-lab people, we envision a laboratory that can take a cannabis sample, inject it into a triple quad and have the machine quickly and effortlessly print out a report of pesticide values. Unfortunately, this is far from reality. The process is much more hands on and complex.In the current chemistry lab, trained analysts have to first program the triple quads to look for the pesticides of concern; in cannabis pesticide testing, this is done by programming the first of two mass spectrometers to identify a single (precursor) mass that is characteristic of the pesticide in question. For BCC requirements in California, this has to be done for all 66 pesticides, one at a time.
Next, these precursor ions are degraded into secondary chemicals called the “product” ions, also called transition ions. The second of the two mass spectrometers is used to analyze these transition ions. This process is graphed and the resulting spectrum is analyzed by trained chemists in the lab, pesticide by pesticide, for all the samples processed that day. If the lab analyzes 10 samples, that translates to 660 spectra to analyze (66 pesticides x 10 samples). When looking at the spectra for each pesticide, the analysts must compare the ratios of the precursor ions to the product ions.
Confirmation Testing
If these spectra indicate a given pesticide may be present, the chemists must then compare the ratios between the precursor and the products. If these ratios are not what is expected, then the analyst must perform confirmation testing to prove the precursor mass either is or is not the pesticide of concern. If the ratios are not what is expected, it means the molecule is similar to the pesticide in question, but may not be that pesticide. This confirmatory testing is key to producing accurate results and not failing batches when dealing with closely related chemicals. This process of analyzing spectra is done in all labs that are performing pesticide testing. In this fledgling industry, there are few published cannabis pesticide methods.
The need for this type of confirmation testing doesn’t happen all of the time, but when it does, it will take longer than our targeted three-day turn-around time. In the picture above, one precursor mass is ionized into several product masses; but only two are large enough to be used for comparison. In this hypothetical situation, two product masses are produced for every one precursor, the expected ion abundance ratio should be less than 30%. When performing any confirmatory testing, if the ion abundance ratio is >30%, it means the original precursor molecule was not the pesticide of concern. For example, if the ion abundance ratio was 50%, then the original molecule broke down into too many parts; it was not the pesticide we were looking for. This ion abundance ratio threshold was established by FANCO, the international organization that sets guidelines for all pesticide testing.
Testing Strategies
Methodology: In this fledgling industry, there are few published cannabis pesticide methods. The identification of the precursor mass and product ions are not always published, leaving labs to research which ions should be used. This adds to the potential for differences between lab results. Once selected, labs should validate their research, through a series of experiments to ensure the correct precursor and transition (product) ions are being used in the method.
Sample Preparation: Beyond the time-consuming work that is required to develop sound pesticide methods, the extraction step is absolutely critical for credible results. If the pesticides aren’t fully extracted from the cannabis product, then the results will be lower than expected. Sample preparations are often not standardized between labs, so unless a given extraction technique is validated for accuracy, there is the possibility for differences between labs.
Getting a Representative Sample
The current California recommended amount of sample is one gram of product per batch. Batch sizes can vary greatly and it is entirely likely that two different one gram samples can have two different results for pesticides. Has the entire plant been evenly coated with exactly the same amount of pesticide onto every square inch of its leaves? No, probably not. That is why it is imperative to take a “random” sample, by taking several smaller samples from different areas of the entire batch.
Sampling Plans: We can learn a lot from the manufacturing and sampling best practices developed by the food industry through the years. If a food manufacturer is concerned with the possibility of having a bacteria pathogen, like Salmonella, in their finished product, they test the samples coming off their production lines at a statistically relevant level. This practice (theory) is called the sampling plan and it can easily be adapted to the cannabis industry. The basic premise is that the more you test, the higher your likelihood of catching a contaminate. Envision a rectangular swimming pool, but instead of water, it’s filled with jello. In this gelatinous small pool, 100 pennies are suspended at varying levels. The pennies represent the contaminates.
Is the pool homogenized? Is jello evenly represented in the entire pool? Yes.
Is your concentrate evenly distributed in the extraction vessel? Yes. The question is, where are the pennies in that extraction vessel? The heavy metals, the microbial impurities and the pesticides should be evenly distributed in the extraction vessel but they may not be evenly represented in each sample that is collected. Unfortunately, this is the bane of the manufacturing industry and it’s the unfortunate reality in the food industry. If you take one random cup of jello, will you find the penny? Probably not. But it you take numerous 1 cup samples from random areas within the batch, you increase your chances of finding the contaminate. This is the best approach for sampling any cannabis product.
The best way to approve a batch of cannabis product is to take several random samples and composite them. But you may need to run several samples from this composite to truly understand what is in the batch. In the swimming pool example, if you take one teaspoon scoop, will you find one of the pennies? The best way to find one of the pennies is to take numerous random samples, composite them and increase the number of tests you perform at the lab. This should be done on any new vendor/cultivator you work with, in order to help establish the safety of the product.
I was wrong. And that’s a good thing! Based on all available data, I assumed that evaporating ethanol from a cannabis oil/ethanol solution would result in terpene loss. As it turns out, it doesn’t. There are so many beliefs and assumptions about cannabis: Cannabis cures cancer!1 Smoking cannabis causes cancer!2 Sativas help you sleep; Indicas make you creative!3,4 CBD is not psychoactive!5 But are these ‘facts’ backed by science? Have they been experimentally tested and validated?
I postulated a theory, designed experiments to validate it and evaluated the results. Simply putting “cannabis backed by science” on your label does not solve the problem. Science is not a marketing term. It’s not even a fixed term. The practice of science is multifaceted and sometimes confusing. It evolved from the traditional model of Inductivism, where observations are used in an iterative process to refine a law/theory that can generalize such observations.6 Closely related is Empiricism, which posits that knowledge can only come from observation. Rationalism, on the other hand, believes that certain truths can be directly grasped by one’s intellect.7 In the last century, the definition of science was changed from the method by which we study something, such as Inductivism or Rationalism, and refocused on the way we explain phenomena. It states that a theory should be considered scientific if, and only if, it is falsifiable.8 All that means is that not the way we study something is what makes it scientific, but the way we explain it.
I wonder how can we use empirical observations and rational deliberations to solve the questions surrounding cannabis? And more importantly, how can we form scientific theories that are falsifiable? Cannabis, the plant, the drug, has long been withheld from society by its legal status. As a result, much of what we know, in fact, the entire industry has thrived in the shadows away from rigorous research. It’s time for this to change. I am particularly concerned by the lack of fundamental research in the field. I am not even talking about large questions, like the potential medical benefit of the plant and its constituents. Those are for later. I’m talking about fundamental, mundane questions like how many lumens per square centimetre does the plant need for optimal THC production? What are the kinetics of cannabis extraction in different solvents? What are the thermodynamics of decarboxylation? Where do major cannabinoids differ or align in terms of water solubility and viscosity?
The lack of knowledge and data in the cannabis field puts us in the precarious position of potentially chasing the wrong goals, not to mention wasting enormous amounts of time and money. Here’s a recent example drawn from personal experience:Certainly, I cannot be the only one who has made an incorrect assumption based on anecdotes and incomplete data?
Some of the most common steps in cannabis oil production involve ethanol solutions. Ethanol is commonly removed from extraction material under reduced pressure and elevated heat in a rotary evaporator. I expected that this process would endanger the terpenes in the oil – a key component of product quality. My theory was that volatile terpenes9 would be lost in the rotary evaporator during ethanol10 removal. The close values of vapor pressure for terpenes and ethanol make this a reasonably assumed possibility.11 In the summer of 2018, I finally got the chance to test it. I designed experiments at different temperatures and pressures, neat and in solution, to quantify the terpene lost in ethanol evaporation. I also considered real life conditions and limitations of cannabis oil manufacturers. After all the experiments were done, the results unequivocally showed that terpenes do not evaporate in a rotary evaporator when ethanol is removed from cannabis extracts.12 As it turns out, I was wrong.
We, as an industry, need to start putting money and effort into fundamental cannabis research programs. But, at least I ran the experiments! I postulated a theory, designed experiments to validate it and evaluated the results. At this point, and only this point, can I conclude anything about my hypothesis, even if that is that my working theory needs to be revised. Certainly, I cannot be the only one who has made an incorrect assumption based on anecdotes and incomplete data?
There is a particular danger when using incomplete data to form conclusions. There are many striking examples in the medical literature and even the casual observer might know them. The case of hormone replacement therapy for menopause and the associated risks of cardiovascular diseases showed how observational studies and well-designed clinical trials can lead to contradicting results.13 In the thirties of the last century, lobotomy became a cure-all technique for mental health issues.14 Dr. Moniz even won the Nobel Prize in Medicine for it.15 And it must come as no surprise when WIRED states “that one generation’s Nobel Prize-winning cure is another generation’s worst nightmare.”16 And with today’s knowledge is impossible to consider mercury as a treatment for syphilis, but that is exactly what it was used as for many centuries.17 All those examples, but the last one in particular should “be a good example of the weight of tradition or habit in the medical practice, […] of the necessity and the difficulties to evaluate the treatments without error.”18 There is the danger that we as cannabis professionals fall into the same trap and believe the old stories and become dogmatic about cannabis’ potential.
We, as an industry, need to start putting money and effort into fundamental cannabis research programs. That might be by sponsoring academic research,19 building in-house research divisions,20 or even building research networks.21 I fully believe in the need for fundamental cannabis research, even the non-sexy aspects.22 Therefore, I set up just that: an independent research laboratory, focused on fundamental cannabis research where we can test our assumptions and validate our theories. Although, I alone cannot do it all. I likely will be wrong somewhere (again). So, please join me in this effort. Let’s make sure cannabis science progresses.
References
No, it does not. There are preliminary in-situ studies that point at anti-cancer effects, but its more complicated. The therapeutic effects of Cannabis and cannabinoids: An update from the National Academies of Sciences, Engineering and Medicine report, Abrams, Donald I., European Journal of Internal Medicine, Volume 49, 7 – 11
No, it does not. National Academies of Sciences, Engineering, and Medicine. 2017. The Health Effects of Cannabis and Cannabinoids: The Current State of Evidence and Recommendations for Research. Washington, DC: The National Academies Press. https://doi.org/10.17226/24625.
No, it does not. The chemical profile of the plant dictates the biological effects on humans, not the shape of the leaf. Justin T. Fischedick, Cannabis and Cannabinoid Research, Volume: 2 Issue 1: March 1, 2017
Indica and Sativa are outdated terms. Piomelli D, Russo EB. The Cannabis sativa versus Cannabis indica debate: An Interview with Ethan Russo, MD. Cannabis Cannabinoid Res 2016; 1: 44–46.
No, it is. CBD’s supposed “calming effects” is indeed a psychoactive effect. However, it is not intoxicating like THC. Russo E.B., Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects.Br. J. Pharmacol. 2011; 163: 1344-1364
As attributed to Francis Bacon.
See the work by philosopher Baruch Spinoza.
As theorized by Karl Popper.
Monoterpenes have a vapor pressure in the low to mid hundreds of Pascals at room temperature.
Vapor pressure of 5.95 kPa at 20˚C.
Furthermore, there is always the possibility of azeotropes in complex mixtures. Azeotropes are mixtures of two or more liquids that have different boiling points individually, but in mixture boil together.
Terpene Retention via Rotary Evaporator Application Note, Heidolph North America
Editor’s Note: The following is based on research and studies performed in their Santa Cruz Lab, with contributions from Mikhail Gadomski, Lab Manager, Ryan Maus Technical Services Analyst, Laurie Post, Director of Food Safety & Compliance, and Charles Deibel, President Deibel Cannabis Labs.
Heavy metals are common environmental contaminants resulting from human industrial activities such as mining operations, industrial waste, automotive emissions, coal fired power plants and farm/house hold water run-off. They affect the water and soil, and become concentrated in plants, animals, pesticides and the sediments used to make fertilizers. They can also be present in low quality glass or plastic packaging materials that can leach into the final cannabis product upon contact. The inputs used by cultivators that can be contaminated with heavy metals include fertilizers, growing media, air, water and even the clone/plant itself.
The four heavy metals tested in the cannabis industry are lead, arsenic, mercury and cadmium. The California Bureau of Cannabis Control (BCC) mandates heavy metals testing for all three categories of cannabis products (inhalable cannabis, inhalable cannabis products and other cannabis and cannabis products) starting December 31, 2018. On an ongoing basis, we recommend cultivators test for the regulated heavy metals in R&D samples any time there are changes in a growing process including changes to growing media, cannabis strains, a water system or source, packaging materials and fertilizers or pesticides. Cultivators should test the soil, nutrient medium, water and any new clones or plants for heavy metals. Pre-qualifying a new packaging material supplier or a water source prior to use is a proactive approach that could bypass issues with finished product.
Testing Strategies
The best approach to heavy metal detection is the use of an instrument called an Inductively Coupled Plasma Mass Spectrometry (ICP-MS). There are many other instruments that can test for heavy metals, but in order to achieve the very low detection limits imposed by most states including California, the detector must be the ICP-MS. Prior to detection using ICP-MS, cannabis and cannabis related products go through a sample preparation stage consisting of some form of digestion to completely break down the complex matrix and extract the heavy metals for analysis. This two-step process is relatively fast and can be done in a single day, however, the instruments used to perform the digestion are usually the limiting step as the digesters run in a batch of 8-16 samples over a 2-hour period.
Only trace amounts of heavy metals are allowed by California’s BCC in cannabis and cannabis products. A highly sensitive detection system finds these trace amounts and also allows troubleshooting when a product is found to be out of specification.
For example, during the course of testing, we have seen lead levels exceed the BCC’s allowable limit of 0.5 ppm in resin from plastic vape cartridges. An investigation determined that the plastic used to make the vape cartridge was the source of the excessive lead levels. Even if a concentrate passes the limits at the time of sampling, the concern is that over time, the lead leached from the plastic into the resin, increasing the concentration of heavy metals to unsafe levels.
Getting a Representative Sample
The ability to detect trace levels of heavy metals is based on the sample size and how well the sample represents the entire batch. The current California recommended amount of sample is 1 gram of product per batch. Batch sizes can vary but cannot be larger than 50 pounds of flower. There is no upper limit to the batch sizes for other inhalable cannabis products (Category II).
It is entirely likely that two different 1 gram samples of flower can have two different results for heavy metals because of how small a sample is collected compared to an entire batch. In addition, has the entire plant evenly collected and concentrated the heavy metals into every square inch of it’s leaves? No, probably not. In fact, preliminary research in leafy greens shows that heavy metals are not evenly distributed in a plant. Results from soil testing can also be inconsistent due to clumping or granularity. Heavy metals are not equally distributed within a lot of soil and the one small sample that is taken may not represent the entire batch. That is why it is imperative to take a “random” sample by collecting several smaller samples from different areas of the entire batch, combining them, and taking a 1 g sample from this composite for analysis.
Citterio, S., A. Santagostino, P. Fumagalli, N. Prato, P. Ranalli and S. Sgorbati. 2003. Heavy metal tolerance and accumulation of Cd, Cr and Ni by Cannabis sativa L.. Plant and Soil 256: 243–252.
Linger, P. J. Mussig, H. Fischer, J. Kobert. 2002. Industrial hemp (Cannabis sativa L.) growing on heavy metal contaminated soil: fibre quality and phytoremediation potential. Ind. Crops Prod. 11, 73–84.
Last month, Sequoia Analytical Labs admitted that they falsified hundreds of pesticide tests for batches of cannabis products. The Sacramento-based laboratory faked data on 22 different pesticide tests for more than 700 batches over a period of four months.
According to a notice posted on Sequoia’s website, the skewed results were originally found due to a “faulty instrument” but “it was further discovered” that the lab director knew about it and was fraudulently posting the results in order to hand out certificates of analysis. The lab director in question has since been fired and Sequoia voluntarily relinquished their state license.
Joe Devlin, Sacramento’s chief of cannabis enforcement, told KCRA3 News “We’re going to be taking a look at suspending or possibly revoking their permit.” He followed that up with saying that California needs more testing labs. “The shortage of labs has really created a bottleneck in the supply chain across the state,” says Devlin. There are only 43 licensed laboratories in the state of California as of this time, and just three of those are in Sacramento.
The Bureau of Cannabis Control (BCC), the regulatory authority overseeing the cannabis testing market in California, has not commented on this story, but they did reach out to distributors who had sent batches to Sequoia for testing. “Any cannabis goods from these batches, returned by consumers to the retailer, must be destroyed,” reads the BCC letter. “Any cannabis goods returned from a retailer’s inventory or remaining in your inventory may be destroyed, or may be re-sampled and re-tested after obtaining approval from the Bureau. Any cannabis goods from these batches may not be released to a retailer without re-sampling and re-testing.”
Sequoia Analytical Labs posted two notices on their homepage, one was a letter to their clients informing them of the fraud and the other is that BCC letter to distributors doing the same. “Management and ownership were horrified to learn about this severe breach of a very important safety regulation,” reads the notice. “We have voluntarily surrendered our license to do COA testing to the BCC while we make the required corrections. We are already hard at work making the needed changes to the instrument and revamping procedures so that we may get our license reinstated January 1.”
As of today, the lab’s license has not been reinstated.
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The virtual event will help attendees better understand some of the more technical aspects of starting and operating a laboratory. Topics discussed will include pesticide testing, cannabinoid and terpene testing, the new ISO 17025:2017 accreditation and a lesson in starting a laboratory in a new market.
