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Discrimination of legal and illegal Cannabis spp. according to European legislation using near infrared spectroscopy and chemometrics.
Drug Testing and Analysis ( IF 2.6 ) Pub Date : 2020-07-06 , DOI: 10.1002/dta.2865
Céline Duchateau 1, 2 , Jean-Michel Kauffmann 1 , Michaël Canfyn 2 , Caroline Stévigny 1 , Kris De Braekeleer 1 , Eric Deconinck 1, 2
Affiliation  

Aerial parts containing cannabidiol can be purchased in a legal way but cannabis used as recreational drug is illegal in most European countries. Δ9‐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.

中文翻译:

合法和非法大麻的歧视。根据欧洲法规,使用近红外光谱和化学计量学。

可以通过合法方式购买含有大麻二酚的空中部件,但在大多数欧洲国家,用作消遣性药物的大麻是非法的。Δ9-四氢大麻酚是产生精神作用的主要大麻素之一。欧盟国家和瑞士分别批准了 0.2% 和 1.0% w/w的 THC 浓度,用于吸烟产品和工业大麻。公共卫生检查员和执法人员需要检查样本的合法性。因此,需要创新方法,以简单的方式并最好在现场对这些产品进行质量控制。在许多国家/地区,如果 THC 含量不超过 0.2% w/w,则允许种植工业大麻便携式设备可以成为农民定期检查 THC 含量的有用测量工具。在这项工作中,使用台式和手持式 NIR 设备分析了 189 个样品,以便根据欧洲和瑞士法律创建两种分类方法。所有样品也通过 GC-FID 分析以确定它们的 THC 浓度。应用监督分析以建立最佳模型。对于第一个分类,带有台式数据的测试集的准确率为 91%,带有手持数据的测试集的准确率为 93%。对于第二个分类,准确度分别为 91% 和 95%。获得的模型、连字符光谱技术和化学计量学,能够根据欧洲和瑞士法律区分合法和非法的大麻样本。
更新日期:2020-07-06
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