RESUMO
RESUMEN Actualmente, hay un creciente interés por el estudio de Cannabis sativa y sus componentes ya que se le atribuye propiedades terapéuticas en el tratamiento de enfermedades. En Colombia y específicamente en el departamento del Cauca se comercializan productos de cannabis tanto para fines no medicinales como terapéuticos. En consecuencia, es necesario el análisis de estos productos de manera que se pueda conocer la composición de los mismos y el posible efecto que pueda tener sobre la salud. El análisis de los componentes de estos productos se llevó a cabo empleando la cromatografía líquida de alta resolución (CLAR) y espectrometría de masas (EM), de tal manera que permitieron la identificación de las principales especies cannabinoides; Δ9-tetra hidrocannabinol (THC), cannabidiol (CBD), cannabinol (CBN), cannabigerol (CBG). La separación de los analitos se llevó a cabo mediante la implementación de una columna analítica C18 de fase reversa, elución isocrática 1 mL/ min, presión del sistema 800 PSI, una mezcla de acetonitrilo ACN y buffer fosfato (KHPO4) en relación 65/35 como fase móvil, volumen de inyección de 10 µL, un tiempo de análisis de 15 min, y detección a 220 nm.
SUMMARY Cannabis sativa has now experienced an increasing interest in the study of its components since it is attributed therapeutic properties in the treatment of diseases. In Colombia and specifically in the Cauca Department, Cannabis products are marketed both for non-medicinal and therapeutic purposes. Consequently, it is necessary to analyze these products in such a way that the composition of the products and their possible effect on health can be known. The analysis ofthe components of these products was carried out using high performance liquid chromatog-raphy (HPLC) and mass spectrometry (MS), in such a way that they allowed the identification of the main cannabinoid species; Δ9-tetra hydrocannabinol (THC), cannabidiol (CBD), cannabinol (CBN), cannabigerol (CBG). The separation of the analytes was carried out by means of the implementation of a reverse phase C18 analytical column, isocratic elution 1 mL/min, system pressure 800 PSI, a mixture of acetonitrile ACN and phosphate buffer (KHPO4) in relation 65/35 as mobile phase, injection volume of10 µL, analysis time of15 min, and detection at 220 nm.
RESUMO
An analytical method of ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC/PDA-QDa) for the qualitative and quantitative analysis of Δ9-tetrahydrocannabinol (Δ9-THC), cannabidiol (CBD), and cannabinol (CBN) in confiscated cannabis was developed.The seized cannabis was extracted in methanol by sonication.The binary mobile phase consisted of methanol (containing 0.1% formic acid) and water.After centrifugation, the supernatant was separated on Waters UPLC BEH C18 column (50 mm×2.1 mm, 1.7 μm) with isocratic elution at a flow rate of 0.2 mL/min.The three cannabinoids were analyzed by photodiode array (PDA) detector at 220 nm and confirmed by mass spectrometer QDa.The correlation coefficient of standard curve for the three cannabinoids in linearity range was not less than 0.999, as well as the recoveries were 82%-102% with the relative standard deviations (RSD) of 0.36%-4.12% at three spiked levels.The method is specific, easy, quick and suitable for confirmation of the cannabinoids in seized cannabis.Cannabis plants in different areas were classified by their chemical phenotype as drug-type or fiber-type plants, taking into account the phenotypic index Δ9-THC, (Δ9-THC+CBN)/CBD, or the Δ9-THC/CBD and the (Δ9-THC+CBN)/CBD ratios.The analysis of the original composition of plant material is necessary for the detection and the quality control of cannabis plants.
RESUMO
OBJECTIVES@#To establish a high performance liquid chromatographic （HPLC） method for simultaneous determination of three effective constituents, including tetrahydrocannabinol （THC）, cannabidiol （CBD） and cannabinol （CBN） in Cannabis plants.@*METHODS@#A C₁₈ column was used in this study, and acetonitrile-phosphate buffer （0.015 mol/L KH₂PO₄） was used as mobile phase at a flow rate of 1.0 mL/min. At a detection wavelength of 220 mm, UV absorption spectra were collected at the wavelength range of 190-400 nm, and the spectra and retention time were counted as qualitative evidence.@*RESULTS@#THC, CBD and CBN could be well separated by this method. Three components had good linear relationship in the range of 0.4-40 μg/mL （R²≥0.999 3）. The recoveries were over 87%. The limits of detection were 1.8 ng, 2.0 ng and 1.3 ng, respectively. The relative standard deviation （RSD） were less than 5% for both inter-day and intra-day precisions.@*CONCLUSIONS@#Reversed-phase HPLC method is simple, rapid and accurate, and it is suitable for the qualitative and quantitative detection of THC, CBD and CBN in Cannabis plants.