CAJ | 학술논문

食用油本身是不导电物质，而使用过的地沟油含有大量食盐、调味品等可电离物质。故可通过测定食用油的电导率鉴别是否掺入地沟油。用去离子水提取油脂得到油脂水提物，再通过测定水提物电导率鉴别油脂是否掺入地沟油。结果表明，合格食用油电导率在10μs/cm左右，而地沟油电导率为80.7μs/cm，远远高于合格食用油。将地沟油以不同比例与食用油混合，测定电导率回归方程为Y=71.927X+12.641，R2=0.9997。此法可用于地沟油的鉴别且简单、有效。并利用此法对成都市售散装食用油掺入地沟油情况进行调查，为市场监管部门提供监管建议。
식용유본신시불도전물질，이사용과적지구유함유대량식염、조미품등가전리물질。고가통과측정식용유적전도솔감별시부참입지구유。용거리자수제취유지득도유지수제물，재통과측정수제물전도솔감별유지시부참입지구유。결과표명，합격식용유전도솔재10μs/cm좌우，이지구유전도솔위80.7μs/cm，원원고우합격식용유。장지구유이불동비례여식용유혼합，측정전도솔회귀방정위Y=71.927X+12.641，R2=0.9997。차법가용우지구유적감별차간단、유효。병이용차법대성도시수산장식용유참입지구유정황진행조사，위시장감관부문제공감관건의。
Edible oil is not electrically conductive substance, Hogwash oil contains a lot of salt, spices and other ionizable substances. Therefore, by the determination of the edible oil conductivity can identification whether it mixed with hogwash oil. The results show that conductivity of qualified edible oil was about 10 μs/cm. The conductivity of the hogwash oil was 80.7μs/cm, far higher than the qualified edible oil. Measured the conductivity of qualified edible oil that mixed with hogwash oil in different proportions. The regression equation was Y =71.927X+12.641, R2=0.999 7.So, this method could be used to identification the hogwash oil and was simple and effective. Investigate situation of edible oil in bulk mixed with hogwash oil method on Chengdu by this method, provided supervision recommended for market supervision department.