采用电子鼻检测羊奶中的牛奶掺入

Discrimination of cow milk in goat milk by electronic nose

通过电子鼻系统检测在羊奶中掺入不同比例的牛奶的混合物中挥发性物质的响应值,利用主成分分析法(PCA)及线性判别分析法(LDA)对羊奶牛奶混合物的挥发性成分进行分析。结果表明:电子鼻各感应器对于原料羊乳和牛乳及杀菌羊乳和牛乳的反应值均不同。对于生奶和杀菌奶,PCA和LDA分析均能够区分羊奶中混入不同比例的牛奶,具有较好的区分性。

The purpose of this paper was to analyze the volatile constituents of goat and cow＇s milk mixture by electronic nose system using principal component analysis（ PCA） and linear discriminate analysis（ LDA）. The results showed that： the raw-or sterilized cow＇s milk was different from goat＇s milk in the response values tested by the sensor of the electronic nose. Both PCA and LDA were valuable in distinguishing goat＇s milk adulterated with cow＇s milk.