GemmaCert measures Total THC and Total CBD.
Results assume 0.877 conversion ratio from the acid from of THCA and CBDA into the active form of THCΔ9 and CBD, respectively. Accordingly, totals are calculated as percentages of total weight using formula below.
%Total THC = 0.877× (%THCA) + (%Δ9THC)
%Total CBD= 0.877× (%CBDA) + (%CBD)
Note that some cannabis products on the market misstate totals as plain summation, disregarding conversion ratio.
Note that GemmaCert results are percentages of total weight whereas HPLC results are percentages of dry weight.
GemmaCert repeatability for:
- Ground is up to 0.6%
- Flower is up to 1.5%
Therefore, if you are eager to find accurately the composition of a particular flower, we recommend averaging results across several analyses.