Cultivation of hemp for commercial purposes was expanded in 2017 by the West Virginia Legislature’s Industrial Hemp Development Act, Code §19-12-E. The West Virginia Department of Agriculture licenses growers and performs testing of industrial hemp during its growing period to determine the THC, or tetrahydrocannabinol levels. THC is a naturally-occurring cannabinoid in Cannabis sativa L. that is of interest for its pharmacological and toxicological characteristics.
Using highly sensitive equipment, our chemists analyze hemp for the quantitation of Δ9-THC post-decarboxylation, or Total THC for federal regulatory compliance and consumer safety
WVDA inspectors collect official samples in the field while maintaining a proper chain of custody. In preparation for sample analysis, the plant is dried to a constant weight and ground. Samples are placed in frozen storage until they are analyzed for Δ9-THC post-decarboxylation. Ultra-high-performance liquid chromatography (UHPLC) is used to chromatographically separate and quantitate the THC and THC-A.
Δ9-THC post-decarboxylation is calculated using the percentages of delta-9-tetrahydrocannabinol (THC) and delta-9-tetrahydrocannabinolic acid (THC-A), then calculating the loss of CO2 in THC-A.
%Total Δ9-THC = % Δ9-THC + (%Δ9-THCA × 0.877)
Results are used to confirm the total THC concentration on a dry weight basis. Samples that have results above 0.3 total THC are retested in duplicate to confirm results.
Quality control practices are critical to produce sound results. The WVDA Hemp Laboratory uses ISO 17025 standards to produce precise, accurate testing and calibration data.
USDA Interim Final Rule on Domestic Hemp Production
WVDA Proposed Legislative Rules Regarding Hemp and Hemp Products
Please visit the link to currently proposed legislative rule on Hemp products.
Please visit the link to the current proposed changes to the legislative rule on Hemp.