GC Analysis of Terpenes in Cannabis on Equity™-1 after Headspace SPME using 50/30 μm DVB/CAR/PDMS Fiber
材料
SPME 光纤
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS)
needle size 23 ga, StableFlex, for use with autosampler分析色谱柱
标准
配件
顶空瓶，螺旋盖，圆底（仅小瓶），100个装
volume 10 mL, clear glass vial, thread for 18, O.D. × H 22.5 mm × 46 mm, pkg of 100 ea顶空样品瓶的磁性螺旋盖，18 mm螺纹，1.5mm隔垫，100个装
PTFE/silicone septum (white PTFE/blue silicone), septum thickness 1.5 mm, pkg of 100 eaCONDITIONS
sample/matrix
0.5 g dried cannabis in 10 mL headspace vial
SPME fiber
Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), 50/30 μm (57298-U)
extraction
20 min, headspace, 40 °C
desorption process
3 min, 270 °C
sample preparation
30 min equilibration at 40 °C prior to extraction
sample preparation
fiber postbake after extraction, 3 min at 270 °C
column
Equity-1, 60 m x 0.25 mm I.D., 0.25 μm (28047-U)
oven
60 °C (2 min), 5 °C/min to 275 °C (5 min)
inj. temp.
270 °C
detector
MSD
MSD interface
300 °C
carrier gas
helium, 1 mL/min constant flow
liner
0.75 mm ID, SPME
说明
分析说明
Terpenes are contained in the essential oils derived from plants, and often impart characteristic aromas to the plant and/or oil. Cannabis sativa (cannabis) contains more than 100 different terpenes and terpenoids, including mono, sesqui, di and tri, as well as other misc. compounds of terpenoid orgin. Terpene profile does not necessarily indicate geographic orgin of a cannabis sample, however it can be used in forensic applications to determine the common source of different samples. In addition, different cannabis strains have been developed which have distinct aromas and flavors, a result of the differing amounts of specific terpenes present. In this application, headspace-SPME combined with GC/MS was used to analyze some of the terpenes present in dried cannabis. Sample was obtained courtesy of Dr. Hari H. Singh, Program Director at the Chemistry & Physiological Systems Research Branch of the National Institute on Drug Abuse at the National Institute of Health. The exact strain of the sample was not known. Chromatographic separation was performed on an Equity™-1 capillary GC column, and identification was done using retention indices and spectral library match.
法律信息
Equity is a trademark of Sigma-Aldrich Co. LLC