法医学杂志 ›› 2024, Vol. 40 ›› Issue (5): 454-460.DOI: 10.12116/j.issn.1004-5619.2023.330702

• 论著 • 上一篇    下一篇

HPLC-MS/MS法检测尿液中依托咪酯及依托咪酯酸

何天夫(), 朱焕慧, 田源源, 金银霜, 林贤文, 王松才()   

  1. 广州市刑事科学技术研究所,广东 广州 510442
  • 收稿日期:2023-07-26 发布日期:2025-02-11 出版日期:2024-10-25
  • 通讯作者: 王松才
  • 作者简介:何天夫(1993—),男,硕士,工程师,主要从事毒物毒理学研究;E-mail:2406603895@qq.com
  • 基金资助:
    广州市民生科技攻关专题资助项目(2019030009)

Detection of Etomidate and Etomidate Acid in Urine Using HPLC-MS/MS Method

Tian-fu HE(), Huan-hui ZHU, Yuan-yuan TIAN, Yin-shuang JIN, Xian-wen LIN, Song-cai WANG()   

  1. Guangzhou Forensic Science Institute, Guangzhou 510442, China
  • Received:2023-07-26 Online:2025-02-11 Published:2024-10-25
  • Contact: Song-cai WANG

摘要:

目的 建立一种尿液样品中依托咪酯和依托咪酯酸的高效液相色谱-串联质谱(high performance liquid chromatography-tandem mass spectrometry,HPLC-MS/MS)检测方法。 方法 待测尿液样品中加入乙腈沉淀蛋白,离心后取上清液过膜,使用C18色谱柱进行分离,流动相为0.1%甲酸水溶液和乙腈,以0.4 mL/min的流速梯度洗脱。采用电喷雾电离(electrospray ionization,ESI)正离子模式扫描,多反应监测模式检测。通过选择性、线性、检出限等技术参数验证后,应用于1例依托咪酯中毒死亡案例。 结果 尿液样品中依托咪酯和依托咪酯酸的检出限分别为0.2和0.5 ng/mL,定量限分别为0.5和1.0 ng/mL,线性范围内线性关系良好(r>0.995 0)。在低、中、高3个质量浓度水平(依托咪酯:0.5、5、50 ng/mL;依托咪酯酸:1、10、100 ng/mL),基质效应在5.42%~18.47%范围内,提取回收率大于84.25%,稳定性大于88.23%,准确度、精密度和稀释可靠性均满足实验要求。采用本方法从吸食过量依托咪酯死者的尿液中成功检出依托咪酯和依托咪酯酸,质量浓度分别为8.82和27.88 μg/mL。 结论 该方法前处理简单、灵敏度高、线性范围宽,适用于法庭科学领域尿液样品中依托咪酯和依托咪酯酸的检测。

关键词: 法医学, 毒物分析, 依托咪酯, 依托咪酯酸, 高效液相色谱-串联质谱法, 尿液

Abstract:

Objective To establish a high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method for the detection of etomidate and etomidate acid in urine samples. Methods Protein in the urine samples was precipitated by adding acetonitrile, and the supernatant was obtained after centrifugation and filtered. The supernatant was separated on a C18 column with a mobile phase consisting of 0.1% formic acid solution and acetonitrile at a flow rate of 0.4 mL/min. The detection was performed in positive electrospray ionization (ESI) and multiple reaction monitoring (MRM) modes. The method was validated for selectivity, linearity and limit of detection (LOD), and applied to a case of etomidate poisoning death. Results The LOD of etomidate and etomidate acid were 0.2 and 0.5 ng/mL, respectively, and the limit of quantitation (LOQ) were 0.5 and 1.0 ng/mL, respectively. Good linear relationship was observed within the linear range (r>0.995 0). At three concentration levels (0.5, 5, 50 ng/mL for etomidate and 1, 10, 100 ng/mL for etomidate acid), the matrix effect was within the range of 5.42% to 18.47%, the extraction recovery rate was greater than 84.25% and the stability was greater than 88.23%. The accuracy, precision and dilution reliability all met the experimental requirements. Etomidate and etomidate acid were successfully detected with the concentrations of 8.82 and 27.88 μg/mL in the urine of a deceased individual who had consumed excessive etomidate. Conclusion The method has simple pretreatment, high sensitivity and wide linear range, which can be applied to the detection of etomidate and etomidate acid in urine samples in forensic science.

Key words: forensic medicine, toxicological analysis, etomidate, etomidate acid, high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), urine

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