FOOD SCIENCE ›› 2005, Vol. 26 ›› Issue (12): 189-190.

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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

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