食品科学

• 分析检测 • 上一篇    下一篇

满足6 种金属元素测定的混合基体改进剂的选择

耿中华1,2,陈尚龙1,2,张建萍1,2,巫永华1,2,高良鹏1   

  1. 1.徐州工程学院食品(生物)工程学院,江苏 徐州 221111;
    2.徐州工程学院 江苏省食品资源开发与质量安全重点建设实验室,江苏 徐州 221111
  • 出版日期:2014-07-25 发布日期:2014-08-26
  • 基金资助:

    江苏省食品资源开发与质量安全重点建设实验室资助项目(SPKF201317);国家自然科学基金面上项目(31270577)

Screening of Mixed Matrix Modifiers for Determination of Six Metal Elements in Food Matrices

GENG Zhong-hua1,2, CHEN Shang-long1,2, ZHANG Jian-ping1,2, WU Yong-hua1,2, GAO Liang-peng1   

  1. 1. College of Food (Biological) Engineering, Xuzhou Institute of Technology, Xuzhou 221111, China; 2. Jiangsu Key Construction
    Laboratory of Food Resources Development and Quality Safe, Xuzhou Institute of Technology, Xuzhou 221111, China
  • Online:2014-07-25 Published:2014-08-26

摘要:

找出满足Al、Cd、Pb、Cu、Mn和Cr测定的混合基体改进剂及其最佳添加体积。比较了9 种单一基体改进
剂和4 种混合基体改进剂对这6 种金属元素测定的影响,通过F检验和t检验,检验本法和国标方法之间是否有显著
差异。结果表明,含10 g/L磷酸二氢铵和1 g/L酒石酸的混合基体改进剂能满足这6 种金属元素的测定,最佳添加体
积为7 μL,本法与国标方法没有显著差异,本法加标回收率为93.3%~105.2%。以此建立的方法快速、准确、稳
定,具有较高的实用价值,为食品中多元素检测提供科学依据。

关键词: 金属元素, 基体改进剂, 高分辨-连续光源石墨炉原子吸收光谱法

Abstract:

A mixed matrix modifier with optimum volume for the determination of Al, Cd, Pb, Cu, Mn and Cr in food
samples was found by comparing the effects of nine individual matrix modifiers and four mixed ones on the results
of determination of the six metal elements by high resolution-continuum source graphite furnace atomic absorption
spectrometry (HR-CS GFAAS). By using F-test and t-test, we examined whether there were significant differences between
the developed method and the national standard method. A mixed matrix modifier consisting of ammonium dihydrogen
phosphate (10 g/L) and tartaric acid (1 g/L) was found to be the most suitable one, and its optimum volume was 7 μL. There
was no significant difference between this method and the national standard method and the spiked recoveries of our method
ranged from 93.3% to 105.2%. The method developed in this study proved rapid, accurate and stable with a high practical
value. It can provide a scientific basis for multi-element determination in food samples.

Key words: metal element, matrix modifier, high resolution-continuum source graphite furnace atomic absorption spectrometry (HR-CS GFAAS)

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