主成分及聚类分析用于洽洽香瓜子的快速鉴别

Rapid identification of qiaqia aroma sunflower seeds by principal component analysis and cluster analysis

采用同时蒸馏萃取(SDE)与GC-MS联用对洽洽香瓜子和6种不同品牌香瓜的挥发性成分进行了分析,共分离鉴定出129种挥发性成分,主要由醛类、酮类、酯类、烯烃类、醚类、含硫含氮类、酚类、醇类和酸类化合物组成,不同品牌的香瓜子含有其特有的挥发性风味物质。利用SPSS 19.0分析软件对所得的129种挥发性成分进行主成分分析,取累积贡献率为92.44%的前8个主成分进行聚类分析。结果表明,通过主成分聚类分析能很好的将洽洽香瓜子与其他品牌的香瓜子鉴别区分开。

There were 129 kinds of volatile compounds identified from Qiaqia and other brands sunflower seeds by SDE and GC-MS. The volatile compounds were primarily including aldehydes, ketones, esters, olefins, ethers, phenols, alcohols, acids and compounds containing nitrogen or sulphur. Different brands of aroma sunflower seeds contain their unique volatile flavor compounds. 129 kinds of volatile compounds were analyzed by principal component analysis with the SPSS 19.0 software and 8 principal components with cumulative contribution rate of 92.44% was chosen for the cluster analysis. The result showed that Qiaqia aroma sunflower seeds can be significantly distinguished from the other brands by the principal component and cluster analysis. The results were helpful for further research of chemical identification, improvement of processing technology and flavour formation mechanism of aroma sunflower seeds.