Identification and Determination of Cannabinoids in both Commercially Available and Cannabis Oils Stored Long Term

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  • Yotoriyama Mamoru
    Tochigi Prefectural Institute of Public Health and Environment
  • Ishiharajima Eiji
    Tochigi Prefectural Institute of Public Health and Environment
  • Kato Yoko
    Tochigi Prefectural Institute of Public Health and Environment
  • Nagato Akiko
    Tochigi Prefectural Institute of Public Health and Environment
  • Sekita Setsuko
    Tsukuba Medicinal Plant Research Station, National Institute of Health Sciences
  • Watanabe Kazuhito
    Faculty of Pharmaceutical Sciences, Hokuriku University
  • Yamamoto Ikuo
    School of Pharmaceutical Sciences, Kyushu University of Health and Welfare

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Among cannabinoids (CNs) in two commercially available and long-term stored cannabis oils obtained from the seeds of Cannabis sativa L. in Japan, tetrahydrocannabinol (THC), canabidiol (CBD), cannabinol (CBN), and cannabichromene were identified and determined using high-performance thin-layer chromatography and capillary gas chromatography-mass speectrometry after partitioning extraction with n-hexane/acetonitrile. CNs were determined in two commercially available cannabis oils, designated “Hemp oil” (THC, 16.3 μg/g and CBN, 5.9 μg/g) and “Taima-yu” (CBD, 26.1 μg/g). The concentration of CBD in a cannabis oil that had been stored for 20 years was 107 ± 4 μg/g. However, no other CNs including THC were detected in the oil. The CBD content in the original oil was estimated to be about 130 μg/g from the determination values of the two periods. These results suggest that cannabis oils generally contain CNs to some extent. <br>

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