法医学杂志 ›› 2013, Vol. 29 ›› Issue (6): 425-430.DOI: 10.3969/j.issn.1004-5619.2013.06.006

• 论著 • 上一篇    下一篇

电热板消解电感耦合等离子体质谱法测定人发中33种无机元素的含量

骆如欣,马  栋,张素静,卓先义   

  1. (司法部司法鉴定科学技术研究所 上海市法医学重点实验室,上海 200063)
  • 发布日期:2013-12-25 出版日期:2013-12-28
  • 通讯作者: 马栋,男,副主任法医师,主要从事毒物分析研究;E-mail:madong_112@sina.com; 卓先义,男,研究员,硕士研究生导师,主要从事毒物分析研究;E-mail:zhuoxy@ssfjd.cn
  • 作者简介:骆如欣(1986—),男,河北邯郸人,硕士研究生,主要从事毒物分析研究;E-mail:luorx@ssfjd.cn
  • 基金资助:

    “十二五”国家科技支撑计划项目(2012BAK16B02);国家自然科学基金青年项目(81302613);上海市技术标准专项(13DZ0503001);上海市法医学重点实验室资助项目(13DZ2271500)

Determination of 33 Inorganic Elements in Human Hair by Electricity Plate Digestion and Inductively Coupled Plasma-Mass Spectrometry

LUO RU-XIN, MA DONG, ZHANG SU-JING, ZHUO XIAN-YI   

  1. (Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, P.R.China, Shanghai 200063, China)
  • Online:2013-12-25 Published:2013-12-28

摘要: 目的 建立头发中33种无机元素的电热板消解电感耦合等离子体质谱(inductively coupled plasma-mass spectrometry,ICP-MS)测定方法。 方法 以锂(6Li)、锗(72Ge)、钇(89Y)、铟(115In)、铽(159Tb)作内标,硝酸和过氧化氢作为消解酸体系,采用电热板消解对头发进行前处理,ICP-MS法分析人发中33种无机元素的含量。 结果 电热板消解ICP-MS法的检出限为0.000 1 μg/g(Th)~10.9 μg/g(Ca),定量限为0.000 5 μg/g(Th)~25 μg/g(Ca),加标回收率为86%~113%,日内及日间精密度≤9.2%,与微波消解法检测结果相比,差异无统计学意义。 结论 电热板消解ICP-MS法高效、准确度高,适用于对头发中33种无机元素的分析。

关键词: 法医毒理学, 电感耦合等离子体质谱, 电热板消解, 元素, 头发

Abstract: Objective To establish the electricity plate digestion and inductively coupled plasma-mass spectrometry (ICP-MS) method for determination of 33 inorganic elements in human hair. Methods Lithium (6Li), Germanium (72Ge), Yttrium (89Y), Indium (115In), and Terbium (159Tb) were used as internal standards. The electric heating board digestion in a mixture of nitric acid and hydrogen peroxide was used as the pre-treatment of the hair. Thirty-three inorganic elements in human hair were analyzed by ICP-MS method. Results The detection limit of ICP-MS was 0.000 1 μg/g(Th)~10.9 μg/g(Ca) and the limit of quantitation was 0.000 5 μg/g(Th)~25 μg/g(Ca). The recovery rate of this method was 86%- 113%. The RSD for the intra-day and inter-day were less than 9.2%. The method was not statistically different from microwave digestion method. Conclusion This method is highly efficient and accurate. It can be used for analysis of 33 inorganic elements in human hair.

Key words: forensic toxicology, inductively coupled plasma-mass spectrometry, electric heating board digestion, elements, hair

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