QC and product screening of medicinal cannabis with NIR spectroscopy
5 sept. 2022
Article
Cannabis et spectroscopie proche infrarouge
La spectroscopie dans le proche infrarouge (NIRS) est une technique d'analyse rapide et peu coûteuse, utilisée pour effectuer le contrôle de la qualité (CQ) et le dépistage des produits sur divers produits du cannabis, y compris le chanvre. Elle peut déterminer le profil des cannabinoïdes ou même la puissance des fleurs de cannabis séchées. Le NIRS peut également être utilisé pour le CQ des huiles de cannabis, des cires, des teintures et d'autres formulations..
"Cannabis" est le terme général couvrant un groupe de trois plantes aux propriétés psychoactives variables : Cannabis sativa, Cannabis indica et Cannabis ruderalis [1]. La plante de cannabis est utilisée comme médicament, aliment et pour sa fibre depuis des milliers d'années. Les fleurs et certaines feuilles des plantes de cannabis sont recouvertes de minuscules structures cristallines appelées "trichomes", et ce sont ces structures qui sont responsables de la production des cannabinoïdes utilisés dans de nombreux autres produits.
Lorsque les fleurs de ces plantes sont récoltées et séchées, on obtient l'une des drogues les plus courantes au monde..
What are the most important and well-known cannabis compounds?
Cannabis contains more than 120 compounds known as «cannabinoids» [1]. Each cannabinoid’s effects are not yet completely known, but experts have a decent understanding of three of them: cannabidiol (CBD), cannabigerol (CBG), and tetrahydrocannabinol (THC, or Delta-9-THC). Each of them has its own effects and uses [1]:
- CBD. This is a psychoactive cannabinoid, yet it’s non-intoxicating and non-euphoric, meaning it won’t get you «high». It’s often used to help reduce inflammation and pain. Researchers are still trying to fully understand the effectiveness of CBD’s medical use.
- CBG. This cannabinoid was first isolated in 1964. Research into CBG is still at preclinical stages, but available studies suggest that it holds considerable therapeutic promise. CBG's properties may surpass those of THC without the intoxicating effect. There is also evidence to suggest that CBG may offer anticancer, antidepressant, and antibacterial qualities.
- THC. This is the main psychoactive compound in cannabis. THC is responsible for the «high» that most people associate with cannabis.
Legality of cannabis and hemp
Cannabis is illegal in many countries. However, more and more places are starting to legalize it for medical as well as recreational uses. Hemp, which typically has a low THC content, is still used in many places for its fiber to create products like textiles, rope, and even biodegradable plastics.
The laws regarding cannabis possession and use also vary for each country. Some consider any kind of cannabis possession a serious crime, others permit products containing only CBD, and very few allow people to use products with THC (whether for medical or recreational purposes).