摘要
研究了电子鼻对山羊奶中与膻味有关的游离己酸、辛酸和癸酸的响应差异,为建立电子鼻客观评价山羊奶膻味强度方法提供理论依据。用电子鼻检测不同游离己酸、辛酸和癸酸质量浓度的山羊奶,采用主成分(PCA)、线性判别(LDA)及偏最小二乘回归(PLS)分析电子鼻响应值。结果表明:PCA及LDA都能够区分出不同游离己酸、辛酸和癸酸质量浓度的山羊奶,且LDA区分效果优于PCA;PLS分析的决定系数分别为83.09%,88.92%,61.68%,表明电子鼻响应值与游离己酸、辛酸、癸酸有一定的线性关系。说明应用电子鼻技术评价山羊奶膻味强度具有一定的可行性。
The recognition of electronic nose for free hexanoic acid, octanoic acid and decanoic acid related with the goat odour in goats＇ milk was studied, in order to provide theoretical basis for the establishment of the objective evaluation of electronic nose to goats＇ milk odour intensity method. Electronic nose was used to detect different free hexanoic acid, octanoic acid and decanoic acid content of goats＇ milk, then principal component（PCA）, linear discriminant analysis（LDA） and partial least squares regression（PLS） was used to analyze the responses of electronic nose. The results showed that PCA and LDA are able to distinguish different free hexanoic acid, octanoic acid and decanoic acid content of goats＇ milk, and LDA is superior to that of PCA; the correlation coefficient of PLS analysis are 83.09%, 88.92% and 61.68% , which shows that the electronic nose responses and free hexanoic acid, octanoic acid and decanoic acid have a certain linear relationship. All of these showed that Electronic nose technology has certain feasibility in evaluating the intensity of goat odour.
出处
《中国乳品工业》
CAS
CSCD
北大核心
2015年第3期18-21,共4页
China Dairy Industry
基金
陕西省社发攻关项目(2013k13-04-10)
关键词
致膻游离脂肪酸
山羊奶膻味
电子鼻
free fatty acid responsible for goat odour
goats＇ milk odour
electronic nose
