基于近红外光谱指纹图谱的固态速溶茶分类及茶多酚制品分级研究  

Study on Classification of Solid Instant Tea and Grading of Tea Polyphenol Products Based on NIR Finger-Print Spectrum

作　　者：高玉萍[1,2,3] 杨秀芳[1,4] 孔俊豪[1,4] 涂云飞 龚淑英[3] 谭蓉 王静[1] GA0 Yu-ping;YANG Xiu-fang;KONG Jun-hao;TU Yun-fei;GONG Shu-ying;TAN Rong;WANN Jing(Hangzhou Tea Research Institute,CHINA COOP,Hangzhou 310016,China;Zhejiang Agricultural Business College,Shaoxing 312088,China;Department of Tea Science,Zhejiang University,Hangzhou 310058,China;Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources,Hangzhou 310016,China)

机构地区：[1]中华全国供销合作总社杭州茶叶研究院,浙江杭州310016 [2]浙江农业商贸职业学院,浙江绍兴312088 [3]浙江大学茶学系,浙江杭州310058 [4]浙江省茶资源跨界应用技术重点实验室,浙江杭州310016

出　　处：《中国茶叶加工》2017年第5期21-27,共7页China Tea Processing

基　　金："十三五"国家重点研发计划资助(2016YFD0400805);国家质检公益项目资助(2011102010)

摘　　要：固态速溶茶和茶多酚是最为常见的两种茶制品,文章以这两种茶制品为研究对象,开展了茶制品近红外光谱指纹图谱研究。结果表明,通过与不同类别样品近红外平均光谱相似度比较,可实现固态速溶茶种类和茶多酚质量等级的归属判别,其中固态速溶茶和茶多酚的外部验证判别率分别为76.9%和84.6%,对红、绿速溶茶分类的外部验证判别率可达100%。结合主成分分析和Fisher判别分析,对固体速溶茶种类判别的回代验证总判别率为79.4%,交叉验证总判别率为69.1%,而对茶多酚制品质量等级判别的回代验证总判别率为89.7%,交叉验证总判别率为83.3%。Solid instant tea and tea polyphenols are two common types of tea products,which were the focus of the study in this paper.By applying NIR finger-print specturm,it found that identification of the variety of solid instant tea and quality grade of tea polyphenols could be realized according to similarity comparison of average fingerprint.The outer recognition accuracy of solid instant tea and tea polyphenols were 76.9%and 84.6%respectively,and the outer recognition accuracy of instant black tea and instant green tea is 100%.According to NIR spectrum,combined with factor analysis and Fisher discriminant analysis,recognition accuracy of back substitution of instant tea was 79.4%and recognition accuracy of cross validation was 69.1%.Recognition accuracy of back substitution of tea polyphenols was 89.7%,meanwhile,recognition accuracy of cross validation was 83.3%.

关 键 词：速溶茶 茶多酚 近红外光谱 指纹图谱 

分 类 号：O657.33[理学—分析化学] TS272.7[理学—化学]