Objective To develop a GC-MS/MS method for determination of 2′-diclazepam in blood.Methods The sampling blood was extracted via HLB cartridge (a product from Waters Corporation, enabling operation of the auto-SPE (solid-phase extraction) for this determination) that was eluted with ethyl acetate, having the collected eluate subjected to GC-MS/MS analysis.Results For the 2′-diclazepam tested, a linear relationship was present between the concentration and peak area from the calibration curve in the range of 20~20μg/mL, demonstrating the limit of detection (LOD) being 10ng/mL. Moreover, the average recoveries were shown within the range of 81.8%~90.4%, and the relative standard deviations among 4.89%~5.47%.Conclusion The here-established method is of high sensitivity, selectivity and strong operability, suitable for determination of diclazepam in blood.
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2014
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... -氯地西泮的药物依赖、强奸、抢劫等案件,引起刑事科学技术工作者的高度重视[1,2] ...
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2017
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... -氯地西泮的药物依赖、强奸、抢劫等案件,引起刑事科学技术工作者的高度重视[1,2] ...
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... 取空白血液1 mL 1份,与检材平行操作,作为空白对照检材[3] ...
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2014
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石银涛, 段杰, 王绘军, 等. 自动固相萃取/液相色谱一串联质谱法测定血液中氯硝西泮及其代谢产物7一氨基氯硝西泮[J]. , 2014, 33(12): 1436-1440. (SHIYintao, DUANJie, WANGHuijun, et al. Quantitation of clonazepam and its major metabolite 7-Aminoclonazepam in blood by automated solid phase extraction and liquid chromatography -tand em mass spectrometry[J]. , 2014, 33(12): 1436-1440. )
An automated solid phase extraction/liquid chromatography-tandem mass spectrometric(ASPE/LC-MS/MS) method for the quantitative determination of clonazepam and its major metabolite 7-aminoclonazepam in blood.The samples were cleaned up with a C18 solid phase extraction cartridge using methanol as elute solution,and separated on a Waters AtlantisTM dC18 column(150 mm×3.9 mm,5.0 μm) by gradient elution using methanol and water(containing 0.1% formic acid) as mobile phase.The analysis of target compounds were carried out by LC-MS/MS under multiple reaction monitoring(MRM) in positive ionization mode.The calibration curves showed good linearities in the concentration range of 2-1 000 μg/L with correlation coefficients more than 0.995 9.The detection limits of the method were in the range of 0.2-0.5 μg/L.The mean recoveries at three spiked levels of 50,200,1 000 μg/L were in the range of 72.6%-96.3%,with relative standard deviations of 4.2%-10.3%.The proposed method was rapid,sensitive,simple and accurate,and could be used to detect clonazepam and 7-aminoclonazepam in forensic toxicology.