Tag Archives: lead

Heavy Metals Testing: Methods, Strategies & Sampling

By Charles Deibel
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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.


References

California Cannabis CPA. 12/18/2018.  “What to Know About California’s Cannabis Testing Requirements”. https://www.californiacannabiscpa.com/blog/what-to-know-about-californias-cannabis-testing-requirements. Accessed January 10, 2019.

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.

Handwerk, B. 2015.  “Modern Marijuana Is Often Laced With Heavy Metals and Fungus.” Smithsonian.com. https://www.smithsonianmag.com/science-nature/modern-marijuana-more-potent-often-laced-heavy-metals-and-fungus-180954696/

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.

McPartland, J. and K. J McKernan. 2017.  “Contaminants of Concern in Cannabis: Microbes, Heavy Metals and Pesticides”.  In: S. Chandra et al. (Eds.) Cannabis sativa L. – Botany and Biotechnology.  Springer International Publishing AG. P. 466-467.  https://www.researchgate.net/publication/318020615_Contaminants_of_Concern_in_Cannabis_Microbes_Heavy_Metals_and_Pesticides.  Accessed January 10, 2019.

Sidhu, G.P.S.  2016.  Heavy metal toxicity in soils: sources, remediation technologies and challenges.   Adv Plants AgricRes. 5(1):445‒446.

Marketing Automation for Dispensaries

By Arnab Mitra
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What is Marketing Automation?

Typically when most people think of marketing automation, they imagine a platform that automates activities such as lead scoring, customer segmentation, cross-selling and campaign management. Well that type of automation is primarily for B2B companies, who are looking to reach a mass audience at once. Plus, B2B marketing automation platforms usually only provide one channel, which is email, to reach their customers.

B2C companies are looking to grow their brand and reach their customers through personalized messages. A B2C marketing automation platform helps businesses understand where each individual customer is in their journey and determine what actions need to be taken to move each customer forward. Plus they get the option of multiple channels to reach their customer, including email, text message, IM, push notifications and more.

Why is Marketing Automation Important for Dispensaries?

The first obvious reason why marketing automation is important is for the simple fact that reaching your customers is now automated; you don’t have to send out messages yourself. Thus helping save time and scale your reach at once. But marketing automation is much more important than the simple reason of saving time and scaling your reach. At SailPlay, we believe the automation of these activities helps dispensaries be able to deliver the right message at the right time to the right customer, helping the long-term success of the business.

For example, knowing where each of your customers are in their journey helps you to not only segment them into different groups, but also create specific campaigns per group. Through marketing automation you will know if you have a new lead, repeat customer and loyal customer, helping you tailor a campaign for each group.

New Lead Campaign

Each time a new lead visits your dispensary or your website, run an email or SMS campaign to provide them with a discount code to entice them to make a purchase. And after their first purchase, send a communication one day later to ask them about their experience and the product purchased.

Repeat Customer Campaign

For any repeat customers, you know which products they have purchased in the past. Run campaigns that are specific to the product groups they have purchased before. These customers are more likely to engage in your campaign if they are interested in the product.

Loyal Customer Campaign

For loyal customers, run exclusive campaigns based on their specific past purchases. For example, if John prefers to purchases edibles, run a campaign for John about an exclusive offer on a new edible.

The more personalized your campaigns are for your customers, the more engagement you can expect. According to Experian, there is a 26% increase in engagement with a personalized campaign when compared to a non-personalized campaign.

Plus with more engagement, your chances of increased sales greatly rise. According to a VB Insight study, 80% of businesses that use marketing automation have seen an increase in leads, with the majority being quality leads.

What Dispensaries Should Focus On For Marketing Automation 

With there being so many marketing automation software companies to choose from, we thought we would help you focus on a couple of key features.

B2C Marketing Automation

Be sure to choose a B2C marketing automation platform. When you search for “Marketing Automation” through Google or any search engine, you will find many B2B marketing automation platforms. B2B marketing automation platforms are different because B2B platforms are interested in bulk marketing and messaging, while B2C platforms are focused on the personalization and customer journey. And as an FYI, some B2B platforms will say they have a B2C platform as well, but they will be focusing most of their features to B2B since there are more B2B companies using marketing automation.

Selecting More Than Just an Email Service Provider

If your goal is to just send out emails, then choosing an email service provider is the way for you to go. But if your goal is to go beyond that, then choose a B2C marketing automation platform. With a B2C marketing automation platform you should expect the following:

  • Loyalty Platform: Through a loyalty platform, you can build out a customer loyalty program that will help increase customer retention. Through the loyalty platform, you can create a rewards system, providing your customers for points for various actions, including purchases and social media actions.
  • Communication Platform: Within the communication platform, you can create powerful email, SMS, IM and push notification campaigns to reach each customer with the right message at the right time.
  • CRM Platform: The CRM platform helps you manage your entire customer list from one place. Through the CRM you can create customer segments, dive deep into each customer and more.
  • Analytics Platform: Within the Analytics platform, you can analyze your clients’ actions, their purchases, and socio-demographic data. Plus you can measure the effectiveness of your loyalty program, marketing campaigns, promotions and more to improve future results.

Before it gets too saturated, dispensaries need to invest in marketing automation. As stated, marketing automation can help your dispensary create a personalized experience for each of your customers, leading to higher engagement and ideally more sales.