基于GC-MS技术对不同香型白酒的判别分析

Discriminant analysis of different flavor-type Baijiu based on GC-MS

基于气相色谱-质谱(GC-MS)联用技术检测5种香型白酒挥发性风味成分,并结合聚类分析(CA)、主成分分析(PCA)及偏最小二乘判别分析(PLS-DA)等化学计量学手段分析检测结果,并对不同白酒的香型进行识别和分类。结果表明,不同香型白酒样品中的风味成分具有明显差异,PLS-DA中的2个成分能很好的代表酒样中的基本信息,5种香型的组心质都相互分离,没有重合,将“测试集”和“训练集”的判定结果与实际结果相比较,正确率均为100%。因此,利用GC-MS技术结合化学计量学方法,可用于不同香型白酒的鉴别分析。

The volatile flavor components of five flavor-type Baijiu were detected based on gas chromatography-mass spectrometry(GC-MS),and based on this,the determination results were analyzed by cluster analysis(CA),principal component analysis(PCA),partial least squares discriminant analysis(PLS-DA)and other chemometrics methods,and the different flavor-types Baijiu were identified and classified.The results showed that the flavor components in different flavor-type Baijiu samples were significantly different.Two components could well represent the basic information of the Baijiu samples by PLS-DA,the cores of the five groups were separated from each other without overlap,and the accuracy rates of the judgement results in the"test set"and"training set"were 100%.Therefore,GC-MS technology combined with chemometrics methods could be used for discriminant analysis of different flavor-types Baijiu.