Tag Archives: labs

Mark Your Calendars: The Cannabis Labs Virtual Conference Returns

By Cannabis Industry Journal Staff
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On January 15th, 2020, Cannabis Industry Journal is hosting the 3rd Annual Cannabis Labs Virtual Conference. From 11–4 pm ET, you’ll get access to five veterans of the cannabis industry discussing a wide range of cannabis testing issues. Hear from subject matter experts who will share their perspectives on regulations for cannabis and hemp testing, THC and CBD testing, laboratory management, moisture content and water activity and microbiological testing.

Speakers include:

  • Charles Deibel, President & CEO of Deibel Labs, Inc.
  • Dr. Brady Carter, Sr. Applications Scientist with Neutec
  • Aaron Hilyard, Microbiologist at DigiPath Labs
  • Heather Wade, President of Heather Wade Group, LLC
  • Heather Ebling, Senior Applications & Support Manager at Medicinal Genomics

Attendees will have the opportunity to ask speakers questions during the live Q&A session that follows each presentation. Five experts, five presentations, all on the same day and free to attend. Register now for this complimentary series of webinars. 

Cannabis Labs Virtual Conference

CannabisIndustryJournal.com is proud to present the 3rd Annual Cannabis Labs Virtual Conference. This complimentary collection of webinar presentations will help attendees better understand some of the more technical aspects of starting and operating a laboratory. We will take a deep dive into cannabis and hemp testing, THC and CBD testing, laboratory management, moisture content and water activity as well as an overview of regulations throughout the United States. Take a look at the presentations and speakers below for more information.

Attendees registering for this complimentary series of webinars will get access to five veterans of the cannabis lab testing industry, who are all available for Q&A after each presentation. In addition to getting the opportunity to chat with these subject matter experts on January 15th, a recording of the presentations will be made available to all who register.

Practical and educational information from experts in the cannabis lab testing industry, all on the same day and all from the comfort of your lab, home or office. Want real inside knowledge on the cannabis testing industry? Sign up today!

Steven Burton

Standardization: A Guide Through the Minefield

By Steven Burton
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Steven Burton

Now that cannabis edibles have been legalized nationally in Canada, many existing and aspiring license holders have been surprised to discover that they must comply with food safety regulations. This became crystal clear when Health Canada published their Good Production Practices Guide For Cannabis in August 2019.

With this development, it should be obvious to everyone that Good Manufacturing Practices (GMP) certifications are simply not enough.

Hazard Analysis and Critical Control Point (HACCP) based preventative control programs are now the absolute minimum and higher levels of certification (GFSI) should be on everyone’s wish list.

HACCP is a methodology that is all about identifying biological, chemical and physical hazards and determining how they will be controlled to mitigate the risk of injury to humans. Recently, bio-terrorism and food fraud hazards have been added to the list and it is a good idea to address quality hazards as well.

The process of developing a HACCP program involves identifying these hazards with respect to ingredients, materials, packaging, processes and cross-contamination points (explicitly required in Canada only). However, it is a specific ingredient hazard that I’d like to talk about here.

HACCPAs this market has emerged, I’ve met with many cannabis companies as the onerous levels of knowledge and effort required to build and maintain an effective HACCP program manually has dawned upon the industry. Many are looking for technological solutions to quickly solve this problem. During these discussions, a curious fact has emerged that set off the food safety alarm klaxons around here.

Most people alive today are too young to remember this but, with few exceptions, the standardization of ingredients is a relatively modern phenomenon. It used to be that the fat content of your milk varied from season to season and cow to cow. Over time, the food industry standardized so that, amazingly, you can now choose between milks with either 1% or 2% fat, a level of precision that would border on miraculous to someone born in the early 20th century.

The standardization of ingredients is important in terms of both quality and safety. Take alcohol for example. We know that a shot of spirits generally contains 40% alcohol. Different products may vary from this standard but, if I pour a shot of my favourite Bowmore No.1 single malt in Canada or Tasmania, this year or 10 years from now, I can expect a consistent effect from the 40% alcohol content of the quantity I’ve imbibed.

Imagine a world in which this was not the case, where one shot would be 40% but the next might be 80%. Things could get out of control quite easily at the 80% level so, to avoid this, distillers monitor and blend their product to ensure they achieve the 40% target, which is called the “standardization marker”.

With respect to cannabis, the obvious standardization marker is THC. During the manufacturing process, edibles manufacturers do not normally add cannabis flower directly into their products but instead add a THC concentrate produced during previous production steps. However, we’ve found that the wisdom of standardizing these concentrates has not yet dawned upon many in the industry, which is alarming at best and dangerous at worst.

The reason for this is that, since cannabis is inherently a heterogeneous plant, one cannot precisely achieve a particular marker value so the outcome of the concentration process is variable. The food industry long ago overcame this problem by blending or diluting to achieve a consistent marker concentration, but the cannabis industry has not yet adopted this advance.

The cannabis edibles industry is still immature and it will take time to bring all the necessary risk mitigation processes into place but one excellent place to start is to seriously consider standardizing concentrates to a THC marker.Instead, manufacturers simply keep track of the strength of each batch of concentrate and then adjust the quantity added to their recipes to achieve the desired THC content. This seems logical on the surface but presents a serious risk from the HACCP perspective, namely a chemical hazard, “Excessive psychoactive compound concentrations due to human error at levels that may be injurious to human health”.

The reality is that workers make mistakes, which is why it is imperative to mitigate the risk of human error insomuch as possible. One of the best ways to do this is to standardize to avoid the scenario where a worker, faced with a row of identical containers that are differentiated only by a tiny bit of text, accidentally grabs the wrong bottle. The error isn’t caught until the product has been shipped, consumed, and reports of hospital visits start coming in after the authorities trace the problem back to you. You must bear the costs of the recall, your reputation has been decimated and your company is floundering on the financial rocks.

US-based Drip More, LP recently found this out the hard way after consumers complained that their product tasted bad, bitter and/or harsh. An investigation determined that excessive nicotine content was the source of the problem and a voluntary recall was initiated. Affected product that had already been sold in 26 states. The costs of this recall have not been tallied but they will be staggering.

The cannabis edibles industry is still immature and it will take time to bring all the necessary risk mitigation processes into place but one excellent place to start is to seriously consider standardizing concentrates to a THC marker. This strategy is cheap, easy and you’ll never be sorry.

Soapbox

3 Food Safety Precautions for Edibles

By Cindy Rice
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You’ve survived seasons of cannabis cultivations, bringing in quality plants in spite of mold, mites, drought and other challenges that had to be conquered. Extraction methods are sometimes challenging, but you are proud to have a cannabinoid extract that can be added into your own products for sale. Edibles are just waiting to be infused with the cannabinoids, for consumers demanding brownies, gummies, tinctures and almost any food and beverage imaginable. You’ve been through the fire, and now the rest is easy peasy, right?

Food processing and sanitation
Avoiding cross contamination should be a priority for edibles manufacturing

Actually, producing edibles may not be so seamless as you think. Just as in the rest of the food industry, food safety practices have to be considered when you’re producing edibles for public consumption, regardless of the THC, CBD, terpene or cannabinoid profile. Once you’ve acquired the extract (a “food grade ingredient”) containing the active compounds, there are three types of hazards that could still contribute to foodborne illness from your final product if you’re not careful- Biological, Chemical and Physical.

Biological hazards include pathogenic bacteria, viruses, mold, mildew (and the toxins that they can produce) that can come in ingredients naturally or contaminate foods from an outside source. Chemical hazards are often present in the kitchen environment, including detergents, floor cleaners, disinfectants and caustic chemicals, which can be harmful if ingested- they are not destroyed through cooking. Physical objects abound in food production facilities, including plastic bits, metal fragments from equipment, staples or twist ties from ingredient packages, and personal objects (e.g., buttons, jewelry, hair, nails.)

There are three main safety precautions that can help control these hazards during all the stages of food production, from receiving ingredients to packaging your final products:

1. Avoid Cross Contamination

  • Prevent biological, chemical or physical hazards from coming into contact with foods
  • Keep equipment, utensils and work surfaces clean and sanitized.
  • Prevent raw foods (as they usually carry bacteria) from coming into contact with “Ready-to-eat” foods (foods that will not be cooked further before consuming).
  • Keep chemicals away from food areas.

2. Personal Hygiene

  • Don’t work around foods if you’re sick with fever, vomiting or diarrhea. These could be signs of contagious illness and can contaminate foods or other staff, and contribute to an outbreak.
  • Do not handle ready-to-eat foods with bare hands, but use a barrier such as utensils, tissues or gloves when handling final products such as pastries or candies.
  • Wash hands and change gloves when soiled or contaminated.
  • Wear hair restraints and clean uniforms, and remove jewelry from hands and arms.

3. Time & Temperature control

  • Prevent bacterial growth in perishable foods such as eggs, dairy, meats, chicken (TCS “Time and Temperature Control for Safety” foods according to the FDA Model Food Code) by keeping cold foods cold and hot foods hot.
  • Refrigerate TCS foods at 41˚ F or below, and cook TCS foods to proper internal temperatures to kill bacteria to safe levels, per state regulations for retail food establishments.
  • If TCS foods have been exposed to room temperature for longer than four hours (Temperature Danger Zone 41˚ F – 135˚ F,) these foods should be discarded, as bacteria could have grown to dangerous levels during this time.

As cannabis companies strive for acceptance and legalization on a federal level, adopting these food safety practices and staff training is a major step in the right direction, on par with standards maintained by the rest of the retail food industry. The only difference is your one specially extracted cannabinoid ingredient that separates you from the rest of the crowd… with safe and healthy edibles for all.

Beyond THC: Encouraging Cannabinoid and Terpene Production with LEDs

By Andrew Myers
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For years, tetrahydrocannabinol (THC) got all the attention. While THC certainly delivers its own benefits (such as relaxation and pain relief), there’s a whole host of other – and often overlooked – compounds found in cannabis with important benefits as well. THC is truly only the tip of the iceberg when it comes to cannabis’s potential.

As the cannabis industry evolves with changing consumer tastes and developing medical research, growers may employ techniques to boost cannabinoid and terpene profiles in their harvests – beyond merely focusing on THC. Advanced LEDs allow growers to elicit specific biological responses in cannabis crops, including increased concentrations of these naturally occurring chemical compounds.

The Foundation of Cannabis’s Effects
Whether used medicinally or otherwise, cannabis has changed our society and many of our lives – and there’s a collection of naturally occurring chemical compounds, known as cannabinoids and terpenes, to thank.

  • The cannabinoids THC and CBD are the most common and well-researched, however they are accompanied by more than 200 additional compounds, including cannabinol (CBN), cannabigerol (CBG) and tetrahydrocannabivarin (THCV), among others.
  • The cannabis plant also contains terpenes. These structures are responsible for giving flowers (including cannabis), fruits and spices their distinctive flavors and aromas. Common terpenes include limonene, linalool, pinene and myrcene.

Both cannabinoids and terpenes are found in the cannabis plant’s glandular structures known as trichomes. Look closely, and you’ll notice trichomes coating the cannabis flowers and leaves, giving the plant an almost frosty appearance.

macropistil/trichome
A macro view of the trichomes and pistils on the plant

Trichomes – which are found across several plant species – are a key aspect of a cannabis plant’s survival. The specific combination of metabolites produced by trichomes may attract certain pollinators and repel plant-eating animals. Moreover, trichomes (and specifically THC) may act as the plant’s form of sunscreen and shield the plant from harmful ultraviolet rays.

While they play an essential part in the cannabis plant’s lifecycle, trichomes are volatile and easily influenced by a range of environmental factors, including light, heat, physical agitation and time. Therefore, environment is a defining variable in the development of these important structures.

How LEDs Support Cannabinoid and Terpene Development in Crops
Spectrally tunable LEDs give indoor cannabis growers unparalleled control over their crops. As research has expanded about plants’ responses to the light spectrum, growers have discovered they are able to elicit certain physiological responses in the plant. This phenomenon is called photomorphogenesis. At its root, photomorphogenesis is a survival tactic – it’s how the plant responds to miniscule changes in its environment to increase the chances of reaching full maturity and, eventually, reproducing. While cultivated cannabis plants won’t reproduce at an indoor setting, growers can still use the light spectrum to encourage strong root and stem development, hasten the flowering process and the development of bigger, brightly colored flowers.

It makes sense that using the proper light spectrums may also have an impact on the production of specific cannabinoids and terpenes – an important factor when responding to highly specific consumer needs and desires, both within medical and adult-use markets.

Here are a few more reasons why utilizing full-spectrum LEDs can lead to higher quality cannabis:

  • Lower Heat, but the Same Intensity.
    When compared to HPS, fluorescent and other conventional lighting technologies, LEDs have a much lower heat output, but provide the same level of intensity (and often improved uniformity). This represents an enormous advantage for cannabis cultivators, as the lights can be hung much closer to the plant canopy without burning trichomes than they would be able to with other lighting technologies.
  • UV Light. Cannabinoids and terpenes are part of the cannabis plant’s natural defense mechanism, so it makes sense that lightly stressing plants can boost cannabinoid and terpene numbers. Some studies illustrate an increase in UV-B and UV-A light can lead to richer cannabinoid and terpene profiles.1 It’s a fine line to walk, though – too much UV can result in burned plants, which leads to a noticeable drop in cannabinoids.
  • Full-Spectrum Capabilities. The cannabis plant evolved over millions of years under the steady and reliable light of the sun. Full-spectrum is the closest thing to natural sunlight that growers will be able to find for indoor growing – and they’ve been shown to perform better in terms of cannabinoid development. A 2018 study titled “The Effect of Light Spectrum on the Morphology and Cannabinoid Content for Cannabis Sativa L.,” explored how an optimized light spectrum resulted in increased expression of cannabinoids CBG and THCV.2

This is the most important tip for indoor growers: your plants’ environment is everything. It can make or break a successful harvest. That means cultivators are responsible for ensuring the plants are kept in ideal conditions. Lights are certainly important at an indoor facility, but there are several other factors to consider that can affect your lights’ performance and the potency of your final product. This includes your temperature regulation, humidity, the density of plants within the space, CO2 concentration and many other variables. For the best results, your lights should be fully aligned with other environmental controls in your space. Nothing sabotages a once-promising crop like recurrent issues in the indoor environment.

solsticegrowop_feb
Indoor cultivation facilities often use high powered lights that can give off heat

Cannabinoids and terpenes take time to develop – so cultivators will want to avoid harvesting their plants too early. On the other hand, these compounds begin to degrade over time, so growers can’t wait too long either.

Cultivators seeking potent cannabinoid and terpene profiles must find a happy medium for the best results – and the best place to look is where cannabinoids and terpenes develop: the trichomes. With a microscope, cultivators can get up close and personal with these sparkly structures. Younger plants begin with clear trichomes, which eventually become opaque and change to amber. Once your plants show amber-hued trichomes, they’re ready for harvest.

The truth here is that there’s no perfect formula to elicit show-stopping cannabinoids and dizzying terpenes with every harvest. A lot of cannabis cultivation is based around trial-and-error, finding what works for your space, your business and your team. But understanding the basics around indoor environmental controls like lighting and temperature – and how they can affect the development of cannabinoids and terpenes – is an excellent place to start. Using high quality equipment, such as full-spectrum LED lighting can boost both cannabinoid and terpene production, resulting in richer, more potent and higher quality strains.


References:

  1. Lyndon, John, Teramura, Alan H., Coffman, Benjamin C. “UV-B Radiation Effects on Photosynthesis, Growth and Cannabinoid Production of Two Cannabis Sativa Chemotypes.” August 1987. Photochemistry and photobiology. Web. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1751-1097.1987.tb04757.x?&sid=nlm%3Apubmed
  2. Magagnini G., Grassi G., Kotiranta, S. “The Effect of Light Spectrum on the Morphology and Cannabinoid Content of Cannabis sativa L.” 2018. Medical Cannabis and Cannabinoids. Web: https://www.karger.com/Article/FullText/489030

North Carolina Gets First Accredited Cannabis Lab

By Cannabis Industry Journal Staff
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In a press release published on Monday, the American Association for Laboratory Accreditation (A2LA), announced the renewal of accreditation for Global Laboratory Services, Inc. for ISO 17025:2017 in cannabis testing. The laboratory, based in Wilson, North Carolina, becomes first cannabis testing laboratory accredited in that state by adding the industrial hemp testing to their chemical scope of accreditation.

According to Kim Hesse, business development manager at Global Laboratory Services, they plan to expand their services in the hemp market with additional types of hemp testing. “At Global Laboratory Services, we always strive to keep pace with industry needs,” says Hesse. “We saw the need for an accredited laboratory in the hemp industry and therefore added CBD and THC testing to our scope. Our next step is to expand our service offerings to include agrochemical analysis of industrial hemp.”

Adam Gouker, general manager at A2LA, says accreditation plays a vital role in the cannabis industry and its regulatory requirements. “We congratulate Global Laboratory Services on becoming the first cannabis testing laboratory accredited in the state of North Carolina, specifically for industrial hemp,” says Gouker. “A2LA realizes the vital role that accreditation plays in the cannabis industry to support compliance with regulatory requirements, and we are thrilled to see that our service has been adopted in a new state. We look forward to our continued relationship with Global Laboratory Services in the provision of their accreditation needs.”

Doctors & Researchers Push Medical Efficacy Forward at 10th IACM

By Marguerite Arnold
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It is easy to forget as one steps inside this world-class medical conference (held this year in Berlin), that cannabis is disputed as medicine anywhere in the world.

Inside a packed conference hall in an upscale hotel in East Berlin, international researchers presented evidence that when taken as a drug, this simple plant can make a world of difference to patients suffering from a range of illnesses.

There were also doctors who talked about prescribing this as medicine (even to children), with dramatic and affirming results (if not heart-warming pictures).

In sum, as always, the IACM is the best place to find facts if not evidence galore to convince even the most hard-boiled egghead that this drug works – and across a broad range of so far “other” drug-resistant medical conditions.

As a participant in the IACM said after the opening remarks on the very first morning, it is so easy to ask the question – “Why are doctors still so afraid of if not resistant to this drug?”

Medical efficacy is no longer an unanswered question…

For those seeking affirmation and evidence, this year’s IACM did not disappoint. There were presentations on the drug’s impact on neurological, oncological and inflammatory conditions that while not all new, are increasingly impactful in an aging planet.

A full house of attendees for the patients panel

But that is not all that was discussed. The broader implications of adding cannabis into skincare, diets and medicine chests were also presented – from cannabis’ impact on lowering obesity and positively affecting acne to impacting the opioid epidemic.

Also intriguing this year was a far-reaching study on how polluted the CBD supply chain is in Europe, even for non-medical and nutraceutical products. Not to mention a socio-political plea for legalization of personal use in South Africa.

And that was just the presentations from the stage and in the poster hall.

The conversations swirling around were just as interesting. Because of course, nobody at this three-day gathering, for all the normalization on display, did forget that this gathering of doctors, scientists, cannabis companies and patients is still an anomaly.

The fact is that there are still too few doctors prescribing. And too few trials. And too many fights over efficacy still in the room.

As Alice O’Leary Randall (wife and former partner in activism with her late husband, Professor Randall who initiated the medical efficacy fight in the U.S. in 1975 over glaucoma) said to Cannabis Industry Journal, “It is hard to believe that we are still fighting the same fights all over again.”

Another “AIDS” Crisis?

There is a more dramatic sense of urgency at the IACM than other conferences that focus just on the “business.” In part, this is because the conference is made up of not only doctors and researchers who fight to prescribe the drug or get trials funded, but also patients on the front lines in a country where the drug is supposed to be covered by health insurance.

Dr. Franjo Grotenhermen (seen on the table) and others during a panel discussion

The patient panel, as a result, was an international face of accusation: To national authorities who still refuse to mandate cannabinoid care – across Europe and beyond. To medical establishments who are not demanding cannabinoid treatment be made mandatory in hospitals and emergency rooms in every country in the EU and beyond. To individual doctors who refuse to come to such conferences, where, if they wanted to, could learn how to begin prescribing the “next penicillin.” To payers and insurers who are still too slow to pick up the message if not the tab.

Indeed, one of the best panels of the conference was a gaggle of doctors, led by Grotenhermen, who discussed the particulars of approaching a new drug – for the very first patient and first time.

Act Up, Speak Out, Silence Equals Death

As the conference wrapped up with its awards dinner, there was of course, a sense of needing to go home with not wanting this to end. For those in the thick of this multi-generational fight, there of course were words of encouragement to colleagues from the industry, internationally. But there was also a new sense of needing to up the pace, if not create faster change.

The battles are far from over – in fact, they are just beginning in many places. As one questioner said of a panel about halfway through the conference – “We need to pick up the fight the same way the AIDS community did on this drug.”

That remark perhaps means less today than it did 20 to 30 years ago when an embattled LGBTQ subculture was the organized point of the spear that fought the early state legalization battles as pioneers for a cause that sought equality as much as it sought a cure.

The plea did not fall on deaf ears.

In the midst of studies, statistics and scientific evidence, in other words, there was a new sense of a need for a renewed fight – and from the medical and scientific community as well as patients.

Multi-Element Analysis Using ICP-MS: A Look at Heavy Metals Testing

By Cannabis Industry Journal Staff
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Across the country and across the world, governments that legalize cannabis implement increasingly rigorous requirements for laboratory testing. Helping to protect patients and consumers from contaminants, these requirements involve a slew of lab tests, including quantifying the levels of microbial contaminants, pathogens, mold and heavy metals.

Cannabis and hemp have a unique ability to accumulate elements found in soil, which is why these plants can be used as effective tools for bioremediation. Because cannabis plants have the ability to absorb potentially toxic and dangerous elements found in the soil they grow in, lab testing regulations often include the requirement for heavy metals testing, such as Cadmium, Lead, Mercury, Arsenic and others.

In addition to legal cannabis markets across the country, the USDA announced the establishment of the U.S. Domestic Hemp Production Program, following the enactment of the 2018 Farm Bill, essentially legalizing hemp. This announcement comes with information for hemp testing labs, including testing and sampling guidelines. While the information available on the USDA’s website only touches on testing for THC, required to be no greater than 0.3% dry weight concentration, more testing guidelines in the future are sure to include a discussion of heavy metals testing.

Table 1. ICP-MS operating conditions (shaded parameters were automatically optimized during start up for the HMI conditions).

In an application note produced by Agilent Technologies, Inc., the Agilent 7800 ICP-MS was used to analyze 25 elements in a variety of cannabis and hemp-derived products. The study was conducted using that Agilent 7800 ICP-MS, which includes Agilent’s proprietary High Matrix Introduction (HMI) system. The analysis was automated  by using the Agilent SPS 4 autosampler.

Instrumentation

The instrument operating conditions can be found in Table 1. In this study, the HMI dilution factor was 4x and the analytes were all acquired in the Helium collision mode. Using this methodology, the Helium collision mode consistently reduces or completely eliminates all common polyatomic interferences using kinetic energy discrimination (KED).

Table 2. Parameters for microwave digestion.

As a comparison, Arsenic and Selenium were also acquired via the MassHunter Software using half-mass correction, which corrects for overlaps due to doubly charged rare earth elements. This software also collects semiquantitative or screening data across the entire mass region, called Quick Scan, showing data for elements that may not be present in the original calibration standards.

SRMs and Samples

Standard reference materials (SRMs) analyzed from the National Institute of Standards and Technology (NIST) were used to verify the sample prep digestion process. Those included NIST 1547 Peach Leaves, NIST 1573a Tomato Leaves and NIST 1575 Pine Needles. NIST 1640a Natural Water was also used to verify the calibration.

Figure 1. Calibration curves for As, Cd, Pb, and Hg.

Samples used in the study include cannabis flower, cannabis tablets, a cannabidiol (CBD) tincture, chewable candies and hemp-derived cream.

Sample Preparation

Calibration standards were prepared using a mix of 1% HNO3 and 0.5% HCl. Sodium, Magnesium, Potassium, Calcium and Iron were calibrated from 0.5 to 10 ppm. Mercury was calibrated from 0.05 to 2 ppb. All the other elements were calibrated from 0.5 to 100 ppb.

Table 3. Calibration summary data acquired in He mode. Data for As and Se in shaded cells was obtained using half mass correction tuning.

After weighing the samples (roughly 0.15 g of cannabis plant and between 0.3 to 0.5 g of cannabis product) into quartz vessels, 4 mL HNO3 and 1 mL HCl were added and the samples were microwave digested using the program found in Table 2.

HCI was included to ensure the stability of Mercury and Silver in solution. They diluted the digested samples in the same acid mix as the standards. SRMs were prepared using the same method to verify sample digestion and to confirm the recovery of analytes.

Four samples were prepared in triplicate and fortified with the Agilent Environmental Mix Spike solution prior to the analysis. All samples, spikes and SRMs were diluted 5x before testing to reduce the acid concentration.

Calibration

Table 4. ICV and CCV recovery tests. Data for As and Se in shaded cells was obtained using half mass correction tuning.

The calibration curves for Arsenic, Cadmium, Lead and Mercury can be found in Figure 1 and a summary of the calibration data is in Table 3. For quality control, the SRM NIST 1645a Natural Water was used for the initial calibration verification standard.  Recoveries found in Table 4 are for all the certified elements present in SRM NIST 1640a. The mean recoveries and concentration range can also be found in Table 4. All the continuing calibration solution recoveries were within 10% of the expected value.

Internal Standard Stability

Figure 2 highlights the ISTD signal stability for the sequence of 58 samples analyzed over roughly four hours. The recoveries for all samples were well within 20 % of the value in the initial calibration standard.

Figure 2. Internal standard signal stability for the sequence of 58 samples analyzed over ~four hours.

Results

In Table 5, you’ll find that three SRMs were tested to verify the digestion process. The mean results for most elements agreed with the certified concentrations, however the results for Arsenic in NIST 1547 and Selenium in both NIST 1547 and 1573a did not show good agreement due to interreferences formed from the presence of doubly-charged ions

Table 5. Mean concentrations (ppm) of three repeat measurements of three SRMs, including certified element concentrations, where appropriate, and % recovery.

Some plant materials can contain high levels of rare earth elements, which have low second ionization potentials, so they tend to form doubly-charged ions. As the quadrupole Mass Spec separates ions based on their mass-to-charge ratio, the doubly-charged ions appear at half of their true mass. Because of that, a handful of those doubly-charged ions caused overlaps leading to bias in the results for Arsenic and Selenium in samples that have high levels of rare earth elements. Using half mass correction, the ICP-MS corrects for these interferences, which can be automatically set up in the MassHunter software. The shaded cells in Table 5 highlight the half mass corrected results for Arsenic and Selenium, demonstrating recoveries in agreement with the certified concentrations.

In Table 6, you’ll find the quantitative results for cannabis tablets and the CBD tincture. Although the concentrations of Arsenic, Cadmium, Lead and Cobalt are well below current regulations’ maximum levels, they do show up relatively high in the cannabis tablets sample. Both Lead and Cadmium also had notably higher levels in the CBD tincture as well.

Table 6. Quantitative data for two cannabis-related products and two cannabis samples plus mean spike recovery results. All units ppb apart from major elements, which are reported as ppm.

A spike recovery test was utilized to check the accuracy of the method for sample analysis. The spike results are in Table 6.

Using the 7800 ICP-MS instrument and the High Matrix Introduction system, labs can routinely analyze samples that contain high and very variable matrix levels. Using the automated HMI system, labs can reduce the need to manually handle samples, which can reduce the potential for contamination during sample prep. The MassHunter Quick Scan function shows a complete analysis of the heavy metals in the sample, including data reported for elements not included in the calibration standards.

The half mass correction for Arsenic and Selenium allows a lab to accurately determine the correct concentrations. The study showed the validity of the microwave sample prep method with good recovery results for the SRMs. Using the Agilent 7800 ICP-MS in a cannabis or hemp testing lab can be an effective and efficient way to test cannabis products for heavy metals. This test can be used in various stages of the supply chain as a tool for quality controls in the cannabis and hemp markets.


Disclaimer: Agilent products and solutions are intended to be used for cannabis quality control and safety testing in laboratories where such use is permitted under state/country law.

USDA Logo

USDA Announces Hemp Regulations

By Aaron G. Biros
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USDA Logo

This morning, U.S. Secretary of Agriculture Sonny Perdue announced the establishment of the U.S. Domestic Hemp Production Program. The program, as stipulated by Congress in the 2018 Farm Bill, will establish a regulatory framework for hemp production in the country.

Secretary Perdue made the announcement in a YouTube video titled “USDA’s Hemp Policy.” Later in the week, an interim final rule formalizing the program will be published in the Federal Register, according to the USDA’s website. “The rule includes provisions for the U.S. Department of Agriculture (USDA) to approve hemp production plans developed by states and Indian tribes including: requirements for maintaining information on the land where hemp is produced; testing the levels of delta-9 tetrahydrocannabinol; disposing of plants not meeting necessary requirements; and licensing requirements,” reads the press release. “It also establishes a federal plan for hemp producers in states or territories of Indian tribes that do not have their own approved hemp production plan.” The interim final rule will go into effect as soon as it is published in the Federal Register, which should be by the end of this week.

You can find a preview of the rule here. The agency has also developed guidelines for sampling and testing procedures, which you can find here. Those documents are meant to provide more information for hemp testing laboratories.

You can watch the YouTube video and read the announcement he made below:

Hello everyone, as I travel across this great country of ours, I hear a lot about a strong interest in a new economic opportunity for America’s farmers: the production of hemp. Which is why today I am pleased to announce the USDA has published the rule establishing the US domestic hemp production program. We said we’d get it done in time for producers to make planning decisions for 2020 and we followed through. We have had teams operating with all hands-on-deck to develop a regulatory framework that meets Congressional intent while seeking to provide a fair, consistent and science-based process for states, tribes, and individual producers who want to participate in this program. As mandated by Congress, our program requires all hemp growers to be licensed and includes testing protocols to ensure that hemp grown under this program is hemp and nothing else. The USDA has also worked to provide licensed growers access to loans and risk management products available for other crops. As the interim final rule, the rule becomes effective immediately upon publication in the federal register. But we still want to hear from you. Help us make sure the regulations meet your needs. That’s why the publication of the interim final rule also includes a public comment period continuing a full and transparent rulemaking process that started with a hemp listening session all the way back in March 2019. At USDA, we are always excited when there are new economic opportunities for our farmers and we hope the ability to grow hemp will pave the way for new products and markets. And I encourage all producers to take the time to fully educate themselves on the processes, requirements and risk that come with any market or product before entering this new frontier. The Agricultural Marketing Service will be providing additional information, resources and educational opportunities on the new program. And I encourage you to visit the USDA hemp website for more information. As always, we thank you for your patience and input during this process.

North Coast Analytical & North Coast Testing Accredited to ISO 17025:2017

By Cannabis Industry Journal Staff
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According to a press release published earlier this month, the American Association for Laboratory Accreditation (A2LA) announced the accreditation of both North Coast Analytical Laboratories and North Coast Testing Laboratories to ISO 17025:2017 for cannabis testing.

Both labs are located in Streetsboro, Ohio, becoming A2LA’s first accredited labs in the state. North Coast Testing does cannabis testing for Ohio’s medical cannabis industry, whereas North Coast Analytical does testing for the hemp industry.

Carolyn Friedrich, Ph.D., scientific director at North Coast Testing, says they are excited to help ensure the safety of patients for Ohio’s medical cannabis program. “We are extremely proud of the work of our entire team in rapidly developing and implementing a comprehensive quality management program that can give all participants in the Ohio Medical Marijuana Control Program confidence in the quality and safety of products tested in our laboratory,” says Friedrich.

Nick Szabo, laboratory director at North Coast Analytical, says A2LA went “above and beyond at every step, we greatly appreciate their efforts. Our accreditation by A2LA is a testament to our ability to meet the most rigorous quality management standards in analytical testing of hemp products, and a vote of confidence in our team’s ability to perform at the highest levels.”