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A Comprehensive Multi-Analyte Method for Hair Analysis: Substance-Specific Quantification Ranges and Tool for Task-Oriented Data Evaluation.
Journal of Analytical Toxicology ( IF 2.5 ) Pub Date : 2020-09-27 , DOI: 10.1093/jat/bkaa131
C Scholz 1 , J Cabalzar 2 , T Kraemer 3 , M R Baumgartner 1
Affiliation  

The aim of the present study was to quantify a large number of analytes including opioids, stimulants, benzodiazepines, z-drugs, antidepressants and neuroleptics within a single sample workup followed by a single analytical measurement. Expected drug concentrations in hair are strongly substance-dependent. Therefore, three different calibration ranges were implemented: 0.5–600 pg/mg (group 1), 10–12,000 pg/mg (group 2), and 50–60,000 pg/mg (group 3). In order to avoid saturation effects, different strategies were applied for selected transitions including the use of parent mass ions containing one or two 13C-isotopes and detuning of the declustering potential and/or collision energy. Drugs were extracted from pulverized hair by a two-step extraction protocol and measured by LC–MS-MS using Scheduled MRM™ Algorithm Pro. In total, 275 MRM transitions including 43 deuterated standards were measured. The method has been fully validated according to international guidelines. A MultiQuant™ software based tool for task-oriented data evaluation was established which allows extracting selected information from the measured data sets. The matrix effects and recoveries were within the allowed ranges for the majority of the analytes. The lower limits of quantification (LLOQs) were for approx. 54% of the analytes in the low-pg/mg-range (0.5–5 pg/mg) and for approximately 25% of the analytes between 10 and 50 pg/mg. These LLOQs considered cut-offs by the SoHT, if recommended. The herein established multi-analyte approach meets the specific requirements of forensic hair testing and can be used for the rapid and robust measurement of a wide range of psychoactive substances. The analyte-specific wide concentration ranges open up a wide field of applications.

中文翻译:

一种用于头发分析的综合多分析物方法:物质特定的量化范围和面向任务的数据评估工具。

本研究的目的是在单个样品处理中量化大量分析物,包括阿片类药物、兴奋剂、苯二氮卓类药物、z-药物、抗抑郁药和神经安定药,然后进行一次分析测量。头发中的预期药物浓度强烈依赖于物质。因此,实施了三种不同的校准范围:0.5–600 pg/mg(第 1 组)、10–12,000 pg/mg(第 2 组)和 50–60,000 pg/mg(第 3 组)。为了避免饱和效应,对选定的离子对应用了不同的策略,包括使用含有一个或两个13C-同位素和去簇势和/或碰撞能量的失谐。通过两步提取方案从粉碎的头发中提取药物,并使用 Scheduled MRM™ Algorithm Pro 通过 LC-MS-MS 进行测量。总共测量了 275 个 MRM 离子对,包括 43 个氘代标准品。该方法已根据国际准则进行了充分验证。建立了一个基于 MultiQuant™ 软件的工具,用于面向任务的数据评估,它允许从测量数据集中提取选定的信息。大多数分析物的基质效应和回收率都在允许的范围内。定量下限 (LLOQ) 约为 54% 的分析物在低 pg/mg 范围 (0.5–5 pg/mg) 和大约 25% 的分析物在 10 到 50 pg/mg 之间。这些 LLOQ 被 SoHT 视为截止点,如果推荐。本文建立的多分析物方法满足法医毛发测试的特定要求,可用于快速、稳健地测量范围广泛的精神活性物质。特定于分析物的宽浓度范围开辟了广泛的应用领域。
更新日期:2020-09-28
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