FOOD SCIENCE ›› 2006, Vol. 27 ›› Issue (12): 681-683.

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Determination of Cr(Ⅵ)and Cr(Ⅲ) in Milk

 WANG  Rong, YUAN  Dong, FU  Da-You, ZOU  Shi-Ying, HU  Xue-Lian   

  1. 1.Material and Chemical Engineering Department, Sichuan University of Sciences and Engineering, Zigong 643000, China;2.College of Light Industry, Textile and Food, Sichuan University, Chengdu 610065, China
  • Online:2006-12-15 Published:2011-11-23

Abstract: Color reaction of Cr(Ⅵ)with diphenylcarbohydrazide (DCP) was studied . In aicd medium, Cr(Ⅵ) reacts with DCP to form an purple complex. The apparent molar absorptivity for Cr(Ⅵ) is 4.02×104L/mol·cm at 540nm, and Beer’s law is obeyed in the range of 0~1.0mg/L. The method has been applied for the determination of chromium in milk with satisfactory results.

Key words: spectrophotometry, diphenylcarbohydrazide, chromium, milk