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当前位置: 首页 > 文章 > 基于电导率的地沟油快速定性与半定量分析 食品科学 2011,32 (18) 304-307
Position: Home > Articles > Fast Qualitative and Semi-quantitative Analysis of Hogwash Oil by Conductivity FOOD SCIENCE 2011,32 (18) 304-307

基于电导率的地沟油快速定性与半定量分析

作  者：
王飞艳;于修烛;吕曼曼;李亚品;韩凌霜
单  位：
西北农林科技大学食品科学与工程学院
关键词：
地沟油;电导率;定性和半定量分析
摘  要：
以食用油和地沟油为试材,建立基于电导率的地沟油定性与半定量检测方法。探讨油脂种类、温度、振荡时间、水油比对测定结果的影响,确定检测条件,并测定各类地沟油和食用油的萃取水相电导率,并建立食用油与处理后地沟油掺杂定量模型并对模型进行验证。结果表明检测条件为在室温条件下水油比4:1(mL/g)、振荡混合30s、静置分层10min,在此条件下,测得毛地沟油水相电导率为30.15～130.80μS/cm,处理后地沟油水相电导率为22.37～44.61μS/cm,食用油水相电导率为3.18～9.18μS/cm;测定食用油水相电导率大于10μS/cm,可以初步断定其掺伪;模型可实现半定量分析。
译  名：
Fast Qualitative and Semi-quantitative Analysis of Hogwash Oil by Conductivity
作  者：
WANG Fei-yan,YU Xiu-zhu,L Man-man,LI Ya-pin,HAN Ling-shuang(College of Food Science and Engineering,Northwest A & F University,Yangling 712100,China)
关键词：
hogwash oil;conductivity;qualitative and semi-quantitative analysis
摘  要：
Fast qualitative and semi-quantitative detection methods to distinguish hogwash oil in edible oil were developed by measuring conductivity.The effects of oil type,temperature,oscillation time,and oil/water ratio on conductivity were explored to establish optimal detection conditions.Through determining the conductivity of all kinds of hogwash oil and edible oil,a quantitative adulteration model of hogwash oil in edible oil was established and validated.The results indicated that the conductivities of crude hogwash oil,refined hogwash oil and edible oil in water phase were determined to be 30.15-130.80,22.37-44.61μS/cm and 3.18-9.18μS/cm,respectively,under the conditions: room temperature,oscillation time of 30 s,oil/water ratio of 1:4(g/mL) and phase separation time 10 min.When the conductivity of an edible oil sample was higher than 10μS/cm,the adulteration of this edible oil could be concluded and the semi-quantitative analysis can be completed by the established model.

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