Tag: DCI

New Hemp Testing for Total THC Requires 5 Grams

The Iowa Division of Criminal Investigation Criminalistics Laboratory recently updated its policies regarding Cannabis testing in light of the 2018 Farm Bill, S.F. 599 and H.F. 2581.  Under the new laws, cannabis containing less than 0.3% total THC (Δ9-THC + THCA) is considered hemp.  Hemp extracts, including CBD, are no longer controlled substances under state […]

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Problems with the Identification of CBD by Thin Layer Chromatography

Thin layer chromatography (TLC) is a well-known qualitative laboratory technique to separate, detect and identify plant material extracts that have been processed so they longer possess botanical characteristics that can be observed through macro and microscopic analysis.  This includes cannabis products like gummies, truffles, bars and other edibles, but also substances like tar, ground plant […]

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Yes, Drug Testing Methods Can Mistake Hemp-Derived CBD for THC

I recently came across a little-known study published in the Journal of Analytical Toxicology that raises serious questions regarding whether the gold standard in forensic urine testing could mistake hemp-derived CBD for THC. Many laboratories include derivatization as a part of their sample preparation for analysis by gas chromatography – mass spectroscopy (GC-MS).  Derivatization is the […]

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