Fully Automated Determination of Amphetamines and Synthetic Designer Drugs in Hair Samples Using Headspace Solid-Phase Microextraction and Gas Chromatography--Mass Spectrometry
作者:F. Musshoff、H. P. Junker、D. W. Lachenmeier、L. Kroener、B. Madea
DOI:10.1093/chromsci/40.6.359
日期:2002.7.1
This study describes a fully automated procedure using alkaline hydrolysis and headspace (HS) solid-phase microextraction (SPME) followed by onfiber derivatization and gas chromatographic (GC)-mass spectrometric (MS) detection of amphetamine, methamphetamine, methylendioxyamphetamine, methylendioxymethamphetamine, methylendioxyethylamphetamine, methylendioxyphenylbutanamine, and methylmethylendioxyphenylbutanamine in human hair samples. Ten milligrams of hair is washed with deionized water, petroleum ether, and dichloromethane. After the addition of deuterated internal standards the sample is hydrolyzed with sodium hydroxide and directly submitted to HS-SPME. After the absorption of analytes for an on-fiber derivatization procedure the fiber is directly placed into the HS of a second vial containing N-methyl-bis(trifluoroacetamide) before GC-MS analysis. The limits of detection are determined between 0.01 and 0.17 ng/mg. Absolute analyte recoveries are in the range between 0.3% and 7.5%. Linearity is proven over a range from 0.1 to 50 ng/mg with coefficients of correlation from 0.998 to 1. In comparison with conventional methods of hair analysis, this fully automated HS-SPME-GC-MS procedure is substantially faster and easier to perform without using solvents. It uses minimal sample amounts and has the same degree of sensitivity and reproducibility.
本研究介绍了一种全自动程序,利用碱性水解和顶空 (HS) 固相微萃取 (SPME),然后在纤维上进行衍生和气相色谱 (GC) - 质谱 (MS) 检测人体毛发样品中的苯丙胺、甲基苯丙胺、甲苯二氧基苯丙胺、甲苯二氧基甲基苯丙胺、甲苯二氧基乙基苯丙胺、甲苯二氧基苯基丁胺和甲基甲苯二氧基苯基丁胺。用去离子水、石油醚和二氯甲烷洗涤 10 毫克的头发。加入氚代内标后,用氢氧化钠对样品进行水解,然后直接送入 HS-SPME。纤维上衍生程序吸收分析物后,直接将纤维放入第二个含有 N-甲基双(三氟乙酰胺)的小瓶的 HS 中,然后进行气相色谱-质谱分析。检测限在 0.01 至 0.17 纳克/毫克之间。分析物的绝对回收率在 0.3% 到 7.5% 之间。与传统的毛发分析方法相比,这种全自动 HS-SPME-GC-MS 程序速度更快,操作更简便,无需使用溶剂。它使用的样品量极少,灵敏度和重现性相同。