一种简化的紫外分光光度法测定热氧化菜籽油过氧化物值。

A simplified UV spectrometric method for determination of peroxide value in thermally oxidized canola oil.

机构信息

National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.

出版信息

Talanta. 2010 Mar 15;80(5):1823-6. doi: 10.1016/j.talanta.2009.10.028. Epub 2009 Oct 23.

DOI:10.1016/j.talanta.2009.10.028

PMID:20152417

Abstract

The aim of present study was to develop a simple method on UV spectrometer for the determination of peroxide value (PV) of the frying oil. The basis of the PV determination was the stoichiometric reaction of triphenylphosphine (TPP) with the hydroperoxides present in frying oil to produce triphenylphosphine oxide (TPPO), which exhibits a readily measurable absorption band at 240 nm by ultraviolet region. The PV ranged between 0.15 and 11.66 meq. of active oxygen per kilogram of oil as the canola oil was heated from 0 to 12h in the fryer at 180 degrees C. The proposed method was correlated with official AOCS titration method and best correlation coefficient (R(2)=0.99525) was achieved, proving that there is no significant difference in the results. Therefore, developed method could serve as an alternative to the titration method, for the determination of PV in frying oils.

摘要

本研究旨在开发一种在紫外分光光度计上测定煎炸油过氧化物值（PV）的简单方法。PV 的测定基础是三苯基膦（TPP）与煎炸油中存在的过氧化物的定量反应，生成三苯基氧膦（TPPO），在紫外区 240nm 处有一个可测量的吸收带。当菜籽油在 180°C 的炸锅中加热 0 至 12 小时时，活性氧的 PV 范围为 0.15 至 11.66meq/kg。所提出的方法与官方 AOCS 滴定法相关联，并且获得了最佳相关系数（R(2)=0.99525），证明结果没有显著差异。因此，开发的方法可以替代滴定法，用于测定煎炸油中的 PV。