食品科学 ›› 2008, Vol. 29 ›› Issue (12): 579-583.

• 分析检测 • 上一篇    下一篇

苯芴酮络合-MIBK萃取-涂钨石墨管电热原子吸收法测定食品中痕量锡

 韩华云, 吴江峰, 胥亚云, 徐卫河, 张西林   

  1. 郑州大学化学系; 河南工业大学;
  • 出版日期:2008-12-15 发布日期:2011-12-08

Determination of Trace Tin in Food through Complexing Reaction between Phenylfluorone and Tin-Methyl Butanone(MIBK) Extraction-Electrothermal Atomic Absorption Spectrometry with Tungsten-coated Graphite Tube

 HAN  Hua-Yun, WU  Jiang-Feng, XU  Ya-Yun, XU  Wei-He, ZHANG  Xi-Lin   

  1. 1.Department of Chemistry,Zhengzhou University,Zhengzhou 450052,China; 2. Henan University of Technology,Zhengzhou 450052,China
  • Online:2008-12-15 Published:2011-12-08

摘要: 本实验建立了一种利用涂钨石墨管电热原子吸收法测定食品中痕量锡的新方法,借助苯芴酮与四价锡离子的配合反应,甲基异丁基甲酮(MIBK)萃取富集,直接以有机相进样测定,提高了测定锡的灵敏度和选择性。本法的灵敏度为5.2×10-12g,检测限为1.7×10-11g,相对标准偏差为5.4%,考察了常见离子对锡测定的干扰效应,结果显示,本方法操作简单,大多数常见离子对锡测定不产生干扰,方法用于红枣、大米和多种海产品中锡的测定,结果满意。

关键词: 苯芴酮, MIBK, 电热原子吸收, 涂钨石墨管,

Abstract: In this study,a new analytical procedure was developed for the determination of trace tin in food using electrothermal atomic absorption spectrometry(ET-AAS) with tungsten-coated graphite tube. By means of the complexing reaction between phenylfluorone and Sn4+-MIBK extraction and enrichment,the samples were injected in graphite furnace in form of organic phase,and the sensitivity of determination of tin was greatly improved. The relative standard deviation is 5.4%. The sensitivity is 5.2×10-12 g and the detection limit is 1.7×10-11 g. Interference of coexistent elements and their elimination were also discussed in detail. This analytical method could be applied for the determination of food samples with satisfactory results because of its simpleness and convenience .

Key words: phenylfluorone, MIBK, ET-AAS, tungsten-coated graphite tube, tin(Sn)