食品科学

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氢化物发生-高分辨连续光源原子吸收光谱法测定食品中的汞和砷

任 婷,曹 珺,赵丽娇*,钟儒刚   

  1. 北京工业大学生命科学与生物工程学院,环境与病毒肿瘤学北京市重点实验室,北京 100124
  • 出版日期:2014-04-25 发布日期:2014-05-13
  • 通讯作者: 赵丽娇
  • 基金资助:

    国家自然科学基金面上项目(21277001);北京市科技新星计划项目(2009B08);
    北京市教育委员会科技计划面上项目(KZ201110005003)

Determination of Mercury and Arsenic in Foods by Hydride Generation-High Resolution Continuum Source Atomic Absorption Spectrometry

REN Ting, CAO Jun, ZHAO Li-jiao*, ZHONG Ru-gang   

  1. Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bioengineering,
    Beijing University of Technology, Beijing 100124, China
  • Online:2014-04-25 Published:2014-05-13
  • Contact: ZHAO Li-jiao

摘要:

使用氢化物发生-高分辨连续光源原子吸收光谱法对谷类、蔬菜、饮品、水产品和乳制品5 类共22 种常见食品中汞和砷的含量进行检测。建立样品预处理和连续光源原子吸收光谱法定量分析的方法,汞和砷的检出限分别为0.067、0.088 μg/L,加标回收率为97.0%~104.2%和96.4%~105.1%,相对标准偏差为0.8%~4.7%和3.5%~4.9%(n=6)。结果表明:全麦面、咖啡和4 种海鲜类样品中的汞含量较高;韭菜、带鱼、贝类和虾中的砷含量较高。

关键词: 氢化物发生-高分辨连续光源原子吸收光谱法, 食品, 汞, 砷, 定量分析

Abstract:

Hydride generation-high resolution continuum source atomic absorption spectrometry (HG-HRCS-AAS) has been
employed in this work to determine mercury (Hg) and arsenic (As) levels in 22 kind of foods including cereals, vegetables,
beverage, aquatic products and dairy foods. The methods for sample pretreatment and quantitative analysis were established. The
limit of detection (LOD) was 0.067 μg/L for Hg and 0.088 μg/L for As. The recoveries of Hg and As from spiked samples were
97.0%–104.2% and 96.4%–105.1%, with RSD of 0.8%–4.7% and 3.5%–4.9% (n = 6), respectively. The results showed that the
content of Hg was higher in whole wheat flour, coffee and aquatic products samples and was detectable in fruit juice samples. The
content of As in Chinese leek, coiliaspp, shellfish and shrimp was higher than that in other tested foods.

Key words: hydride generation-high resolution continuum source atomic absorption spectrometry, foods, mercury, arsenic, quantitative analysis

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