电感耦合等离子体质谱的钡中毒检验方法研究  

Detection of Barium Poisoning by Inductively Coupled Plasma Mass Spectrometry

作　　者：李想[1] 夏鑫鑫 朱昱[1] LI Xiang;XIA Xin-xin;ZHU Yu(Criminal Investigation Police University of China,Shenyang 110854,China)

机构地区：[1]中国刑事警察学院,辽宁沈阳110854

出　　处：《化学试剂》2021年第5期671-675,共5页Chemical Reagents

摘　　要：建立了碰撞反应池-电感耦合等离子体质谱分析测定中毒案件中胃内容和血样钡元素含量的研究方法。通过优化消解液体系、消解时间和消解温度,确定样品前处理的最优消解条件。用碰撞反应池技术降低电感耦合等离子质谱分析中多原子分子造成的干扰。研究结果表明,钡的检出限为0.40 ng/g,回收率在94.80%~105.75%之间,说明所建立的方法具有灵敏度高、准确度高和线性范围宽等优势,适用于胃内容和血中钡含量的检验,可确定中毒或者死亡原因、中毒来源和摄入途径。The method of inductively coupled plasma mass spectrometry(ICP-MS) with the kinetic energy discrimination model(KED) was established for the determination of barium concentration in stomach and blood samples of poisoning cases.By optimizing the digestion liquid system, digestion time and digestion temperature, the optimal digestion conditions for sample pretreatment were determined.In the method, KED was used to eliminate interference from the polyatomic molecules.The limit of detection for barium was 0.40 ng/g.The recovery rate was 94.80%~105.75%.The developed methods had the advantages of high sensitivity, high accuracy and wide linear range.It was suitable for examining barium concentration of stomach and blood samples and was used to determine the cause of poisoning or death, source of poisoning and route of ingestion.

关 键 词：碰撞反应池 电感耦合等离子体质谱 胃内容 血 

分 类 号：O655.1[理学—分析化学]