食品科学 ›› 2013, Vol. 34 ›› Issue (10): 227-230.

• 分析检测 • 上一篇    下一篇

电感耦合等离子体质谱法测定坚果中微量元素

聂西度,符 靓   

  1. 1.湖南工学院材料与化学工程学院,湖南 衡阳 421002;2.长江师范学院化学化工学院,重庆 408100
  • 收稿日期:2012-05-27 修回日期:2013-04-09 出版日期:2013-05-25 发布日期:2013-05-07
  • 通讯作者: 符靓 E-mail:fuliang@vip.163.com
  • 基金资助:

    重庆市自然科学基金资助项目

Determination of Trace Elements in Nuts by Inductively Coupled Plasma Mass Spectrometry

,NIE Xi-du,FU Liang   

  1. 1. College of Materials and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China;
    2. College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
  • Received:2012-05-27 Revised:2013-04-09 Online:2013-05-25 Published:2013-05-07

摘要:

建立电感耦合等离子体质谱法测定坚果Li、Al、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Se、Rb、Sr、Mo、Ag、Cd、Sn、Sb、Ba、Hg、Tl、Pb 24种微量元素的分析方法。应用碰撞反应系统和炬屏蔽系统校正了质谱工作过程中的多原子离子干扰,利用5%甲醇在等离子体中的增敏效应改善了难电离元素质谱分析的灵敏度,获得了仪器的最佳质谱工作参数。采用国家标准物质大米(GBW 10045)验证方法的准确性和精密度。结果表明,所有待测元素的检出限在0.002~0.290μg/L之间。该方法准确度高、精密度好,可用于坚果的质量评价和安全评估。

关键词: 电感耦合等离子体质谱法, 坚果, 八极杆碰撞/反应池, 微量元素, 甲醇

Abstract:

This paper describes a simple method for the determination of Li, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se,
Rb, Sr, Mo, Ag, Cd, Sn, Sb, Ba, Hg, Tl and Pb in nuts using inductively coupled plasma-mass spectrometry (ICP-MS). An
octopole reaction system (ORS) and a shield torch system (STS) were used to eliminate the interferences from polyatomic
ions. The sensitivity of element analysis for those which are difficult to ionize was improved by the addition of 5% methanol.
Optimum instrumental working parameters were established. The accuracy and precision of the proposed method were
validated by the use of rice reference material (GBW 10045). The limits of detection for 24 elements were in the range of
0.002–0.290 μg/L. This method was sensitive, precise and applicable for quality evaluation and safety assessment of nuts.

Key words: inductively coupled plasma mass spectrometry (ICP-MS), nuts, octopole reaction system (ORS), trace elements, methanol

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