FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (12): 579-583.

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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

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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)