FOOD SCIENCE ›› 2004, Vol. 25 ›› Issue (5): 158-160.

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Determination of Tin with Phosphomolybdate Blue Spectrophotometry by Tin (Ⅳ)—Reduced Zinc

 SANG  Hong-Qing, HUANG  Yu-Quan, ZHANG  Hu   

  1. 1.Anhui Normal College of Technology;2.Anhui Fuyang Meilu Food Idustrial Co., Ltd
  • Online:2004-05-15 Published:2011-10-24

Abstract: A new method is presented for the determination of tin in food. The method is based on that zinc can be reduced toSn4+ to Sn2+. The reaction of Sn2+ with phosphomolybdate ammonium formed blue substance on certain conditions. Beer’s lawwas obeyed in the range of 0~20g/ml for tin. The detection limit was 0.001g/ml, and the recovery was 96.9%~102.06%.

Key words: tin, zinc, phosphomolybdate blue, spectrophotometry