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时间:2018-10-31
《基于正交偏最小二乘判别分析法分析茯砖茶和千两茶差异性品质成分》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、基于正交偏最小二乘判别分析法分析茯砖茶和千两茶差异性品质成分李永迪张贻杨彭忠谭斌林海燕成分利用工程技术研宄中心湖南省植物功能成分利用协同创新中心摘要:目的分析茯砖茶和千两茶品质成分的差异,为茯砖茶和千两茶品质鉴定和差异鉴别提供依据。方法以44个品质成分为指标并结合正交偏最小二乘判别分析法(orthogonalpartialleastsquaresdiscriminantanalysis,OPLS-DA)分析,选取VIP(variableimportanceinprojection)值大于1且具有显著差异的品质成分作为特征性差异成分。结果茯砖茶
2、中除草酸外,其余各主要成分含量均高于千两茶。经OPLS-DA共识别出9种VTP值大于1的差异成分,•其中水浸出物、茶多酚、咖啡碱、简单儿茶素和儿茶素为标志性差异品质成分。结论采用OPLS-DA分析茶叶样品品质成分,既可以对茯砖茶和千两茶进行鉴别区分,又可以筛选出两种茶类差异品质成分。关键词:茯砖茶;千两茶;正交偏最小二乘判别分析法;品质成分;差异;作者简介:林海燕,博士,工程师,主要研宂方向为茶叶加工及功能成分化学。E-mail:12524101@qq.com作者简介:李永迪,硕士,主要研究方向为茶叶加工及功能成分化学。E~mai1:jess
3、e_leel2@163.com基金:湖南省教育厅科学研宂项目(15C0670)ThedifferenceofqualitycomponentsofFuzhuanteaandQian-1iangteabasedontheorthogonalpartialleastsquaresdiscriminantanalysismodelLIYong-DiZHANGYi-YangTONGZhongTANBinLINHai-YanTeaKeyLaboratoryoftheMinistryofNationalTeachingofHunanAgricultura
4、lUniversity;NationalResearchCenterofEngineeringTechnologyforUtilizationofBotanicalFunctionalIngredients;Abstract:ObjectiveToanalyzethedifferenceinthequalitycomponentsofFuzhuanteaandQian-1iangteainordertoprovidebasisfortheidentificationofqualityanddifferenceofFuzhuanteaandQi
5、an-liangtea.MethodsForty-fourqualitycomponentsasindicatorsandcombinedwithorthogonalpartialleastsquaresdiscriminantanalysis(OPLS-DA)wasused,thequalitycomponentsofvariableimportanceinprojection(VIP)valuegreaterthan1andsignificantdifferencewereselectedascharacteristicdifferenc
6、es.ResultsBesidesoxalicacid,thecontentoftheothermaincomponentsinFuzhuanteawashigherthanQian-liangtea.AccordingtotheOPLS-DAconsensus,therewere9differenttypesofVTPvaluesgreaterthan1,includingwaterextract,teapolyphenol,caffeine,simplecatechins,andcatcchinsasthesignaturediffere
7、nceofqualitycomponents.ConclusionOPLS-DAcanbeusedtoanalyzethequalitycomponentsofteasamples,whichnotonlycandistinguishtheFuzhuanteaandQian-1iangtea,butalsocanscreenoutthedifferencequalitycomponentsofthem.Keyword:Fuzhuantea;Qian-liangtea;orthogonalpartialleastsquaresdiscrimin
8、antanalysis;qualitycomponents:difference;1引言湖南省黑茶代表性产品主要是茯砖茶和千两茶,近年来,随着研究的深入,它们对肥胖
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