食品科学 ›› 2005, Vol. 26 ›› Issue (7): 189-191.

• 分析检测 • 上一篇    下一篇

催化光度法测定食品中的痕量铜

 黄荣斌, 刘连庆, 刘文涵, 徐伟平   

  1. 浙江工业大学化工与材料学院
  • 出版日期:2005-07-15 发布日期:2011-09-19

Catalytic Spectrophotometric Determination of Trace Cu (Ⅱ) in Foodstuffs

 HUANG  Rong-Bin, LIU  Lian-Qing, LIU  Wen-Han, XU  Wei-Ping   

  1. College of Chemical and Materials Engineering ,Zhejiang University of Technology
  • Online:2005-07-15 Published:2011-09-19

摘要: 研究了测定痕量铜的新催化光度法。方法在pH为11.4的条件下,铜(Ⅱ)催化双氧水氧化百里酚兰的反应。测定铜的线性范围为0~180ng/25ml,检出限为0.31ng/ml。用于食品的测定,结果令人满意。

关键词: 铜, 催化光度法, 食品

Abstract: A new catalytic spectrophotometric method was developed for determination of trace Cu(Ⅱ), based on the catalyticeffect of Cu (Ⅱ) on the reaction of Thymol Blue buffer solution buffer solution with H2O2 in pH=11.4, the detection limit was0.31ng/ml and the linear range 0180ng/25ml. The method has also been applied to the determination of trace amounts of manganesein the foodstuffs with satisfactory results.

Key words: cuprum, catalytic spectrotometric method, foodstuff