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The Cannabis plant, when chemically broken down, has some 750 or more constituents, with as many as 140 of them being identified as cannabinoids.[1][2][3] However, analyzing the chemical constituents of cannabis is a difficult task due to its matrix, and the task becomes even more difficult when it's added to food and other matrix types, requiring established and consistent methods for testing.[4][5] Regulators, users, and the testing industry have over the years made calls for standardizing both the production and testing of medical and recreational marijuana. Without proper standardized testing, several issues are bound to arise[6][7][8][9][10][11]:

  • label claims may not match actual contents;
  • contaminants may linger, causing illness or even death;
  • chemical properties and medicinal benefits of specific strains and their unique cannabinoid-terpene profiles can't be isolated; and
  • research on potential therapeutic qualities can't be replicated, hindering scientific progress.

As legalization efforts continue at the federal level in the U.S.[12][13][14], it's more important than ever that the standards and practices that make up laboratory testing of cannabis continue to solidify under a more consensus-based approach.

But what do we know so far about the Cannabis plant and its constituents? What are the current standards and practices used in various U.S. states (and other parts of the world)? What does the workflow of laboratory testing of cannabis look like today? And what are the requirements for certifying and reporting results? This chapter addresses these questions.

References

  1. ↑ Radwan, M.M.; ElSohly, M.A.; El-Alfy, A.T. et al. (2015). "Isolation and pharmacological evaluation of minor cannabinoids from high-potency Cannabis sativa". Journal of Natural Products 78 (6): 1271-6. doi:10.1021/acs.jnatprod.5b00065. PMC PMC4880513. PMID 26000707. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4880513. 
  2. ↑ Solymosi, K.; Köfalvi, A. (2017). "Cannabis: A Treasure Trove or Pandora's Box?". Mini-Reviews in Medicinal Chemistry 17: 1123–91. doi:10.2174/1389557516666161004162133. 
  3. ↑ Mudge, E.M.; Murch, S.J.; Brown, P.N. (2018). "Chemometric Analysis of Cannabinoids: Chemotaxonomy and Domestication Syndrome". Scientific Reports 8: 13090. doi:10.1038/s41598-018-31120-2. 
  4. ↑ DePalma, A. (10 September 2018). "Challenges of Cannabis Contaminant Testing". Lab Manager. LabX Media Group. https://www.labmanager.com/insights/challenges-of-cannabis-contaminant-testing-1928. Retrieved 07 July 2021. 
  5. ↑ Cummings, J., "Gurus of Pesticide Residue Analysis [The Cannabis Scientist"] (PDF), The Analytical Scientist (Texere Logo Texere Publishing Ltd) (0218), https://theanalyticalscientist.com/fileadmin/tas/pdf-versions/TCS_Issue4.pdf 
  6. ↑ Hazekamp, A.; Fischedick, J.T. (2012). "Cannabis - from cultivar to chemovar". Drug Testing and Analysis 4 (7–8): 660–7. doi:10.1002/dta.407. PMID 22362625. 
  7. ↑ Bush, E. (18 February 2015). "World’s strongest weed? Potency testing challenged". The Seattle Times. The Seattle Times Company. https://www.seattletimes.com/seattle-news/worldrsquos-strongest-weed-potency-testing-challenged/. Retrieved 07 July 2021. 
  8. ↑ Rutsch, P. (24 March 2015). "Quality-Testing Legal Marijuana: Strong But Not Always Clean". Shots. National Public Radio. https://www.npr.org/sections/health-shots/2015/03/24/395065699/quality-testing-legal-marijuana-strong-but-not-always-clean. Retrieved 07 July 2021. 
  9. ↑ Kuzdzal, S.; Clifford, R.; Winkler, P.; Bankert, W. (December 2017). "A Closer Look at Cannabis Testing" (PDF). Shimadzu Corporation. https://www.ssi.shimadzu.com/sites/ssi.shimadzu.com/files/Industry/Literature/Shimadzu_Whitepaper_Emerging_Cannabis_Industry.pdf. Retrieved 07 July 2021. 
  10. ↑ Cassiday, L. (October 2016). "The Highs and Lows of Cannabis Testing". INFORM. American Oil Chemists' Society. https://www.aocs.org/stay-informed/inform-magazine/featured-articles/the-highs-and-lows-of-cannabis-testing-october-2016. Retrieved 07 July 2021. 
  11. ↑ "How Accurate Is Cannabis Potency Testing?". California NORML. 21 September 2011. https://www.canorml.org/business-resources-for-cannabis-brands/how-accurate-is-cannabis-potency-testing/. Retrieved 07 July 2021. 
  12. ↑ "House Passes Legislation to Make Small Businesses in Cannabis Industry Eligible for SBA Lending Programs". Committee News. Small Business Administration. 4 December 2020. https://smallbusiness.house.gov/news/documentsingle.aspx?DocumentID=3480. Retrieved 07 July 2021. 
  13. ↑ Welsh, D. (4 December 2020). "House Approves Decriminalizing Marijuana; Bill To Stall In Senate". NPR. https://www.npr.org/2020/12/04/942949288/house-approves-decriminalizing-marijuana-bill-to-stall-in-senate. Retrieved 07 July 2021. 
  14. ↑ Krane, K. (6 January 2021). "Democrats Win The Senate: The Impact On Marijuana Policy". Forbes. https://www.forbes.com/sites/kriskrane/2021/01/06/democrats-win-the-senate-the-impact-on-marijuana-policy/. Retrieved 07 July 2021. 
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