食品科学 ›› 2005, Vol. 26 ›› Issue (12): 189-190.

• 分析检测 • 上一篇    下一篇

催化光度法测定痕量亚硝酸根的研究及在食品中的应用

 严小平, 李成平   

  1. 浙江树人大学生物与环境工程学院
  • 出版日期:2005-12-15 发布日期:2011-10-01

Catalytic Spectrophotometric Determination of Trace Nitrite and Food Application

 YAN  Xiao-Ping, LI  Cheng-Ping   

  1. Biology and Environment Engineering College, Zhejiang Shuren University
  • Online:2005-12-15 Published:2011-10-01

摘要: 基于稀磷酸介质中亚硝酸根催化溴酸钾氧化橙黄Ⅳ的褪色反应,建立测定痕量亚硝酸根的新方法。方法检出限为0.56×10-6g/L,线性范围为0.03~10.00μg/ml,回收率为98.5%~100.4%。该方法已用于食品中亚硝酸根的测定,结果满意。

关键词: 亚硝酸根, 溴酸钾, 橙黄Ⅳ

Abstract: A new catalytic spectrophotometic method for determination of trace nitrite was developed. The method was based on the catalytic effect of NO2 on oxidation of orange Ⅳ by potassium bromate in H3PO4 medium. The detection limit for nitrite was 0.56×10-6gL.The linear range of the determination was 0.03~10.00μgml and the recovery was among 98.5%~100.4%. The method was applied to direct determination of nitrite in food with satisfactory results.

Key words: nitrite, potassium bromate, orange Ⅳ