电感耦合等离子体质谱法测定食品抗结剂硅铝酸钠中重金属元素

聂西度; 符靓

doi:10.13386/j.issn1002-0306.2015.12.003

电感耦合等离子体质谱法测定食品抗结剂硅铝酸钠中重金属元素

聂西度¹,
符靓²

1. 湖南工学院材料与化学工程学院
2. 长江师范学院化学化工学院

基金项目:

湖南省教育厅重点科研项目(14A035)；重庆市教委重点科研项目(KJ1401209)；湖南省重点学科建设项目(湘教发[2011]76号)资助；

详细信息

作者简介:
聂西度 (1964-) , 男, 博士, 教授, 主要从事无机质谱分析方法的研究与应用。;

符靓 (1987-) , 女, 博士, 主要从事质谱分析化学的研究与应用。;

中图分类号: O657.63;TS207.3
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出版历程
- 收稿日期: 2014-08-31

Determination of heavy metal elements in food antcaking agent sodium aluminosilicate by inductively coupled plasma mass spectrometry

NIE Xi-du¹,
FU Liang²

Department of Material and Chemical Engineering, Hunan Institute of Technology
College of Chemistry and Chemical Engineering, Yangtze Normal University

摘要

摘要: 以氢氟酸和硝酸为混合试剂采用密闭微波消解系统消解食品抗结剂硅铝酸钠样品,建立电感耦合等离子体质谱（ICP-MS）法测定硅铝酸钠中Cr、Ni、As、Cd、Sn、Sb、Hg、Pb等8种重金属元素的分析方法。研究了高盐基体存在时所产生的多原子离子质谱干扰,选择CH4为反应气,应用动态反应池（DRC）技术校正分析过程中的质谱干扰,采用基体匹配法并选择Rh为内标元素校正基体效应及元素分析信号的漂移。分析结果表明,该方法测定硅铝酸钠中8种重金属元素的检出限为1.85¹2.31ng/L,相对标准偏差在2.09%⁵.56%之间,样品的加标回收率为93.19%¹08.47%。国家标准（GBW07423）参考物质的分析结果与所提供的参考值基本一致。方法简单、快速、准确,可用于食品抗结剂硅铝酸钠的质量控制和安全评价。
- 硅铝酸钠 /
- 电感耦合等离子体质谱 /
- 重金属元素 /
- 动态反应池 /
- 基体效应
Abstract: A method for simultaneous and quantitative determination of Cr, Ni, As, Cd, Sn, Sb, Hg and Pb in food antcaking agent sodium aluminosilicate by inductively coupled plasma mass spectrometry ( ICP- MS) was established. The samples were dissolved by using the mixture of HNO3+HF in a closed-vessel microwave digestion system, and then the 8 heavy metals elements in the digestion solution were analyzed directly by ICP- MS. The polyatomic ion interferences of mass spectrometry caused by the high salt substrate were investigated. The CH4 were used as reactant gas, and the dynamic reaction cell (DRC) could eliminate the mass spectral interferences raised in analytical process. The matrix maching and Rh as internal standard element were used to corrected matrix effect and signal drift to correct the matrix effect and signal drift. The results showed that the detection limits of the 8 heavy metals elements were in the range of 1.85 ¹2.31ng/L, relative standard deviations were in the range of 2.09%⁵.56%, and the recoveries of standard addition were in the ranges of 93.19%¹08.47%, respectively. The results of reference standard materials (GBW07423) were in good agreement with the certified value. The method was simple, rapid, accurate and reliable, and could be used in food antcaking agent sodium aluminosilicate quality control and safety estimations.
- sodium aluminosilicate /
- inductively coupled plasma mass spectrometry /
- heavy metal elements /
- dynamic reaction cell /
- matrix effect

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参考文献(15)

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