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Full article title Fast detection of 10 cannabinoids by RP-HPLC-UV method in Cannabis sativa L.
Journal Molecules
Author(s) Mandrioli, Mara; Tura, Matilde; Scotti, Stefano; Toschi, Tullia Gallina
Author affiliation(s) University of Bologna, Shimadzu Italia
Primary contact Email: tullia dot gallinatoschi at unibo dot it
Editors Locatelli, Marcello
Year published 2019
Volume and issue 24(11)
Page(s) 2113
DOI 10.3390/molecules24112113
ISSN 1420-3049
Distribution license Creative Commons Attribution 4.0 International
Website https://www.mdpi.com/1420-3049/24/11/2113/htm
Download https://www.mdpi.com/1420-3049/24/11/2113/pdf (PDF)

Abstract

Cannabis has regained much attention as a result of updated legislation authorizing many different uses, and it can be classified on the basis of the content of Δ9-tetrahydrocannabinol (Δ9-THC), a psychotropic substance for which there are legal limitations in many countries. For this purpose, accurate qualitative and quantitative determination is essential. The relationship between THC and cannabidiol (CBD) is also significant, as the latter substance is endowed with many specific and non-psychoactive proprieties. For these reasons, it becomes increasingly important and urgent to utilize fast, easy, validated, and harmonized procedures for determination of cannabinoids. The procedure described herein allows rapid determination of 10 cannabinoids from the inflorescences of Cannabis sativa L. by extraction with organic solvents. Separation and subsequent detection are by reversed-phase high-performance liquid chromatography with ultraviolet detector (RP-HPLC-UV). Quantification is performed by an external standard method through the construction of calibration curves using pure standard chromatographic reference compounds. The main cannabinoids dosed (g/100 g) in actual samples were cannabidiolic acid (CBDA), CBD, and Δ9-THC (Sample L11 CBDA 0.88 ± 0.04, CBD 0.48 ± 0.02, Δ9-THC 0.06 ± 0.00; Sample L5 CBDA 0.93 ± 0.06, CBD 0.45 ± 0.03, Δ9-THC 0.06 ± 0.00). The present validated RP-HPLC-UV method allows determination of the main cannabinoids in Cannabis sativa L. inflorescences and appropriate legal classification of it as either hemp or a drug-type.

Keywords: cannabinoids, Cannabis sativa L., HPLC, validation



Supplementary material

The following are available online here (.zip):

File S1: Standard operating procedure (SOP) of the method presented in this article, Table S1: Calibration curves relating to the standard solution of 10 cannabinoids determined by RP-HPLC-UV method, Figure S1: Calibration curves relating to the standard solution of 10 cannabinoids determined by RP-HPLC-UV method, File S2: Preliminary tests carried out for development of the analytical procedure by RP-HPLC-UV

Acknowledgements

The authors gratefully acknowledge Enecta Srl for providing samples. The experimentation was conducted in the context of a PhD project entitled Harmonized procedures of analysis of medical, herbal, food and industrial cannabis: Development and validation of cannabinoids’ quality control methods, of extraction and preparation of derivatives from the plant raw material, according to the product destination and funded by Enecta Srl.

Author contributions

Conceptualization, T.G.T., M.M. and M.T.; Methodology, M.M.; Software, M.M. and S.S.; Validation, M.M.; Formal analysis, M.M.; Investigation, T.G.T. and M.M.; Resources, T.G.T. and M.M.; Data curation, M.M., T.G.T. and M.T.; Writing—original draft preparation, M.M., M.T. and T.G.T.; writing—review and editing, T.G.T. and S.S.; Visualization, T.G.T.; Supervision, T.G.T.; project administration, T.G.T.; funding acquisition, T.G.T.

Funding

This research received no external funding; this trial received financial support from Enecta Srl.

Conflicts of interest

The authors declare no conflict of interest.

References

Notes

This presentation is faithful to the original, with only a few minor changes to presentation. Some grammar and punctuation was cleaned up to improve readability. In some cases important information was missing from the references, and that information was added.