Abstract
Cannabidiol (CBD) oil products are available in Japan as cosmetics, fragrances, food and items. Herein, quality testing of cannabinoid profiling in CBD oil products and the evaluation of possible residual tetrahydrocannabinol (THC) in these products using liquid chromatography-tandem mass spectrometry (LC-MS/MS) was conducted. A simple, sensitive, and selective LC-MS/MS assay (electrospray positive ion mode) was employed for the simultaneous quantification of eight cannabinoids. This quantification with three different oil samples showed that accuracy rates ranged from 87.7 to 106.9% (RSD > 3.5%). Furthermore, the quantification limit of THC is 0.001 mg/g of CBD oil products for suitable levels lower than the regulatory value. Notably, this method was used to evaluate CBD oil products from the Japanese market. Additionally, we investigated the THC conversion in CBD oil products at a high temperature (70°C) which has a minor effect on CBD stability in oil products with additives. Herein, the developed LC-MS/MS assay is applied to monitor the quality of CBD, trace THC and other components in CBD oil products.
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