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Determination of Peroxide Value of Edible Oils by Ultraviolet Spectrophotometry

QIN Xiao-yuan,ZHANG Jian-xin,YU Xiu-zhu*,LI Qing-hua,XU Chun-jin   

  1. College of Food Science and Engineering, Northwest A & F University, Yangling 712100, China
  • Online:2013-06-25 Published:2013-06-17

Abstract:

An ultraviolet spectrophotometric method for determining perioxide value (POV) of edible oils was developed
based on the stoichiometric reaction of hydroperoxides with triphenylphosphine (TPP) showing characteristic adsorption
at 264 nm to TPPO showing characteristic adsorption at 266 nm. The presented prediction equations for TPPO were
validated with known and unkown samples, and analyzed in comparison with the national standard method (iodimetry).
Very comparable results of POV were obtained by both methods. In conclusion, the spectrophotometric method may be a
promising alternative to the national standard method for POV determination of edile oils.

Key words: edible oils, peroxide value, ultraviolet spectrophotometry, determination