Titre : | Discrimination of legal and illegal Cannabis spp. according to European legislation using near infrared spectroscopy and chemometrics (2020) |
Auteurs : | C. DUCHATEAU ; J. M. KAUFFMANN ; M. CANFYN ; C. STEVIGNY ; K. DE BRAEKELEER ; E. DECONINCK |
Type de document : | Article : Périodique |
Dans : | Drug Testing and Analysis (Vol.12, n°9, September 2020) |
Article en page(s) : | 1309-1319 |
Langues: | Anglais |
Discipline : | PRO (Produits, mode d'action, méthode de dépistage / Substances, action mode, screening methods) |
Mots-clés : |
Thésaurus géographique EUROPE ; SUISSEThésaurus mots-clés CANNABIS ; ANALYSE CHIMIQUE ; LEGISLATION ; TETRAHYDROCANNABINOL ; CANNABINOIDES ; MESURES QUALITATIVES ; PLANTES ; CLASSIFICATION |
Résumé : |
Aerial parts containing cannabidiol can be purchased in a legal way but cannabis used as recreational drug is illegal in most European countries. Delta9-tetrahydrocannabinol is one of the main cannabinoids responsible for the psychotropic effect. European Union countries and Switzerland authorize a concentration of THC of 0.2% and 1.0% w/w, respectively, for smoking products and industrial hemp. Public health inspectors and law enforcement officers need to check the legality of samples. Therefore there is a need for innovative approaches, allowing quality control of these products in an easy way and preferably on site. In many countries, cultivation of industrial hemp is permitted if the THC content does not exceed 0.2% w/w. A portable equipment could be a useful measuring tool for farmers to check for the THC content at regular time. In this work, 189 samples were analysed with a benchtop and a handheld NIR device in order to create two classification methods according to European and Swiss laws. All samples were also analysed by GC-FID to determine their THC concentration. Supervised analysis was applied in order to establish the best model. For the first classification, the accuracy was 91% for the test set with the benchtop data and 93% for the test set with the handheld data. For the second classification, the accuracies were respectively 91% and 95%. The obtained models, hyphenating spectroscopic techniques and chemometrics, enable to discriminate legal and illegal cannabis samples according to European and Swiss laws.
Highlights: Near infrared spectroscopy spectra were recorded for cannabis samples with benchtop and handheld devices. Two classifications systems (binary and tertiary) were created in relation with European legislation to build classification models (PLS-DA, SIMCA). |
Domaine : | Drogues illicites / Illicit drugs |
Refs biblio. : | 37 |
Affiliation : | ULB-Faculty of Pharmacy - RD3 - Pharmacognosy, Bioanalysis and Drug Discovery Unit, Brussels, Belgium |
Cote : | Abonnement |
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