HuiFen Hannah Zhang, Jia Ying Hilda Loh, Hooi Yan Moy, Chi Pang Lui
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An Improved GC-MS/MS Method for a Fast Multidrug Analysis in Hair.
This study presents the development and validation of a drug testing method in hair, employing a semi-automated sample preparation procedure and gas chromatography-tandem mass spectrometry (GC-MS/MS) for simultaneous multidrug analysis in hair. The method aims to detect and quantify multiple drugs in hair, including amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine, 3,4-methylenedioxymethamphetamine, ketamine, norketamine, cocaine, benzoylecgonine, morphine, codeine and 6-monoacetylmorphine, using a comprehensive procedure involving decontamination, pulverization, clean-up using supported-liquid extraction (SLE) and a two-step derivatization process. The method validation included specificity, linearity, limit of detection (LOD), limit of quantification (LOQ), precision, accuracy, carryover, robustness and stability. The results indicate a linearity range of 0.1-5 ng/mg for all drugs except methamphetamine, which has a linearity range of 0.2-5 ng/mg. The accuracy and precision of the method are within ±20%, with the LOQ at 0.2 ng/mg for methamphetamine, 0.1 ng/mg for amphetamine and MDMA and 0.05 ng/mg for the rest of the drugs. The LODs were found to be 0.1 ng/mg for methamphetamine, 0.05 ng/mg for amphetamine and MDMA and 0.025 ng/mg for other drugs. This method has demonstrated its accuracy by comparing the quantitative test results with the expected results, using hair samples from the proficiency test service providers. This test method offers efficient testing of multiple drugs in a single analysis, significantly improves the hair analysis workflow in a routine testing laboratory by reducing turnaround time and the amount of hair sample required.
期刊介绍:
As the incidence of drugs escalates in 21st century living, their detection and analysis have become increasingly important. Sport, the workplace, crime investigation, homeland security, the pharmaceutical industry and the environment are just some of the high profile arenas in which analytical testing has provided an important investigative tool for uncovering the presence of extraneous substances.
In addition to the usual publishing fare of primary research articles, case reports and letters, Drug Testing and Analysis offers a unique combination of; ‘How to’ material such as ‘Tutorials’ and ‘Reviews’, Speculative pieces (‘Commentaries’ and ‘Perspectives'', providing a broader scientific and social context to the aspects of analytical testing), ‘Annual banned substance reviews’ (delivering a critical evaluation of the methods used in the characterization of established and newly outlawed compounds).
Rather than focus on the application of a single technique, Drug Testing and Analysis employs a unique multidisciplinary approach to the field of controversial compound determination. Papers discussing chromatography, mass spectrometry, immunological approaches, 1D/2D gel electrophoresis, to name just a few select methods, are welcomed where their application is related to any of the six key topics listed below.