| 用三元络合物萃取-火焰原子吸收法测定食品中痕量镉 |
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| 引用本文： | 韩华云,王亚鸽,杨琳,张威,贾春玲,夏辉. 用三元络合物萃取-火焰原子吸收法测定食品中痕量镉[J]. 河南工业大学学报(自然科学版), 2011, 32(6): 67-71 |
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| 作者姓名： | 韩华云 王亚鸽 杨琳 张威 贾春玲 夏辉 |
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| 作者单位： | 郑州大学化学系,河南郑州,450052 |
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| 摘 要： | 建立了一种测定食品中痕量镉的新方法.以茜素黄R和邻菲罗啉为螯合剂,以甲基异丁基甲酮为萃取剂,直接以有机相进样测定,提高了测定的选择性和灵敏度.考察了介质酸度、缓冲溶液及螯合剂的用量等对测定的影响,优化了测定条件.详细研究了常见元素对镉元素测定的干扰情况,用酒石酸钾钠做掩蔽剂,可以消除大量共存组分的影响.在最佳工作条件下,镉离子质量浓度在3.0×10-3 ～0.25 μg·mL-1范围内线性关系良好,方法的检出限为1.7×10-3 μg· mL-1,对0.2 μg· mL-1的镉标准溶液进行9次平行测定,相对标准偏差为1.1％,检出限低,重现性好.该法用于食品中镉的测定,结果满意.
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| 关 键 词： | 三元络合物 原子吸收光谱法 食品 痕量 镉 |
DETERMINATION OF TRACE CADMIUM IN FOOD SAMPLES BY TRIPLE COMPLEX EXTRACTION AND FLAME ATOMIC ABSORPTION SPECTROMETRY |
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| HAN Hua-yun , WANG Ya-ge , YANG Lin , ZHANG Wei , JIA Chun-ling , XIA Hui. DETERMINATION OF TRACE CADMIUM IN FOOD SAMPLES BY TRIPLE COMPLEX EXTRACTION AND FLAME ATOMIC ABSORPTION SPECTROMETRY[J]. Journal of Henan University of Technology Natural Science Edition, 2011, 32(6): 67-71 |
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| Authors: | HAN Hua-yun WANG Ya-ge YANG Lin ZHANG Wei JIA Chun-ling XIA Hui |
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| Affiliation: | HAN Hua-yun,WANG Ya-ge,YANG Lin,ZHANG Wei,JIA Chun-ling,XIA Hui(Department of Chemistry,Zhengzhou University,Zhengzhou 450052,China) |
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| Abstract: | In this study,a new analytical method was developed for determination of trace cadmium in food by flame atomic absorption spectrometry.In the proposed method,1,10-phenanthroline monohydrate and alizarin yellow R were used as chelating agents,and methyl isobutyl ketone(MIBK) was selected as extractant.The samples were injected in flame atomic absorption spectrometry in form of organic phase,and the selectivity and the sensitivity of the determination of cadmium were greatly improved.The effects of pH,concent... |
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| Keywords: | triple complex flame atomic absorption spectrometry foods trace cadmium |
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