基于碘值差异的山茶油掺假判别

Discrimination of Adulteration in Camellia Oil based on Difference of Iodine Value

从不皂化物、相对密度、碘值3个理化指标考察山茶油和其他植物油的区别,对所得数据进行统计学分析,结果表明:山茶油的不皂化物和相对密度与其他植物油不存在显著性差异,山茶油的碘值与其他植物油的碘值差异显著(P<0.05),可以作为山茶油掺假判别的依据。对山茶油中掺混不同比例大豆油和玉米油后的碘值测定结果分析表明,当山茶油∶大豆油为19∶1(即掺入大豆油比例5%)时就可判别,当山茶油∶玉米油9∶1(即掺入玉米油比例10%)时就可判别。

The differences between camellia oil and other vegetable oils were investigated from three physical and chemical indexes of unsaponifiable matter,relative density and iodine value,and the obtained data were analyzed statistically.The results showed that there was no significant difference between unsaponifiable matter and relative density of camellia oil and other vegetable oils,and the iodine value of camellia oil was significantly different from that of other vegetable oils（P0.05）,which could be used as the basis for distinguishing adulteration in camellia oil.Analysis of iodine value of camellia oil mixed with soybean oil and corn oil showed that it could be distinguished when the ratio of camellia oil to soybean oil was 19∶1（i.e.5%soybean oil mixed with 95%camellia oil）,and when the ratio of camellia oil to corn oil is 9∶1（i.e.10%corn oil mixed with 90%camellia oil）.