福建农业科技 ›› 2019, Vol. 50 ›› Issue (11): 51-54.doi: 10.13651/j.cnki.fjnykj.2019.11.009

• 食品科学 • 上一篇    

微波消解和电感耦合等离子体质谱法(ICP-MS)测定小米中12种元素含量

陈晓东   

  1. 宁德市工业产品生产许可证审查技术中心, 福建 宁德 352100
  • 收稿日期:2019-10-02 发布日期:2020-01-18
  • 作者简介:陈晓东,女,1978年生,工程师,主要从事食品生产许可证审查和检验检测等工作。

Determination of the Contents of 12 Elements in Millet by Microwave Digestion and Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

CHEN Xiao-dong   

  1. Ningde Production License Examination Technology Center of Industrial Product, Ningde, Fujian 352100, China
  • Received:2019-10-02 Published:2020-01-18

摘要: 建立微波消解和电感耦合等离子体质谱法(ICP-MS)联用同时测定小米中多种元素含量的检测方法。样品经硝酸微波消解后,通过优化仪器参数、采用碰撞/反应池(ORS)技术等方式消除质谱干扰,在线加入内标校正基体干扰和漂移,用ICP-MS测定小米中Ca、Mg、Fe、Mn、Cr、Ni、Cu、Zn、As、Cd、Hg、Pb共12种元素含量。结果表明:12种元素线性关系良好,其相关系数r均大于0.9995,加标回收率在90.0%~102.2%,相对标准偏差RSD均小于6.6%。采用国家标准物质大米(GBW10010)和小麦(GBW10011)进行方法验证,结果准确可靠。结果证明该方法具有准确、快速、简便、灵敏等优点,适用于小米中多种元素含量的同时测定分析。

关键词: 微波消解, 电感耦合等离子体质谱法, 小米, 元素, 含量

Abstract: Microwave digestion and inductively coupled plasma mass spectrometry (ICP-MS) were used to simultaneously determine the contents of various elements in millet. After the microwave digestion with nitric acid, the mass spectral interference was eliminated by optimizing the instrument parameters and adopting the collision/reaction tank (ORS) technology, and the internal standards were added online to correct the matrix interference and drifting. The contents of Ca, Mg, Fe, Mn, Cr, Ni, Cu, Zn, As, Cd, Hg and Pb in millet were determined by ICP-MS. The results showed that the linear relationship of the 12 elements was good, the correlation coefficient r was all greater than 0.9995, the adding standard recovery was 90.0%-102.2%, and the relative standard deviation (RSD) was all less than 6.6%. The results were verified by using national standard substance rice (GBW10010) and wheat (GBW10011), which was accurate and reliable. The results showed that the method was accurate, rapid, simple and sensitive, and was suitable for the simultaneous determination and analysis of the contents of various elements in millet.

Key words: Microwave digestion, Inductively coupled plasma mass spectrometry, Millet, Elements, Content

中图分类号: 

  • S515