title: A qualitative and quantitative HPTLC densitometry method for the analysis of cannabinoids in Cannabis sativa L.
abstract: BACKGROUND
  Cannabis and cannabinoid based medicines are currently under serious investigation for legitimate development as medicinal agents, necessitating new low-cost, high-throughput analytical methods for quality control.
  
  
  OBJECTIVE
  The goal of this study was to develop and validate, according to ICH guidelines, a simple rapid HPTLC method for the quantification of Delta(9)-tetrahydrocannabinol (Delta(9)-THC) and qualitative analysis of other main neutral cannabinoids found in cannabis.
  
  
  METHODS
  The method was developed and validated with the use of pure cannabinoid reference standards and two medicinal cannabis cultivars. Accuracy was determined by comparing results obtained from the HTPLC method with those obtained from a validated HPLC method.
  
  
  RESULTS
  Delta(9)-THC gives linear calibration curves in the range of 50-500 ng at 206 nm with a linear regression of y = 11.858x + 125.99 and r(2) = 0.9968.
  
  
  CONCLUSIONS
  Results have shown that the HPTLC method is reproducible and accurate for the quantification of Delta(9)-THC in cannabis. The method is also useful for the qualitative screening of the main neutral cannabinoids found in cannabis cultivars.
authors.affiliation: Division of Pharmacognosy, Institute of Biology, Leiden University, Leiden, The Netherlands. jtfische@gmail.com
authors.forename: Justin T
authors.initials: JT
authors.lastname: Fischedick
authors.forename: Ronald
authors.initials: R
authors.lastname: Glas
authors.forename: Arno
authors.initials: A
authors.lastname: Hazekamp
authors.forename: Rob
authors.initials: R
authors.lastname: Verpoorte
mesh_terms: D002186:Cannabinoids / Q000032:analysis* / Q000737:chemistry; D002188:Cannabis / Q000737:chemistry* / Q000145:classification; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer / Q000379:methods*; D003720:Densitometry / Q000379:methods; D013759:Dronabinol / Q000032:analysis / Q000737:chemistry; D035264:Flowers / Q000737:chemistry; D016014:Linear Models; D015394:Molecular Structure; D015203:Reproducibility of Results; D013045:Species Specificity
chemical_list: D002186:Cannabinoids; D013759:Dronabinol