不同等级霍山黄芽茶滋味的电子舌评价及呈味氨基酸组成  

Taste and Delicious Amino Acid Composition of Huoshanhuangya Tea with Different Grades Determined by an Electronic Tongue

作　　者：范培珍[1,2] 郑雨婷[1] 王梦馨[1] 薄晓培 崔林[1] 韩宝瑜[1] 

机构地区：[1]中国计量大学浙江省生物计量及检验检疫技术重点实验室,浙江杭州310018 [2]六安职业技术学院,安徽六安237158

出　　处：《贵州农业科学》2017年第5期105-109,共5页Guizhou Agricultural Sciences

基　　金：荷兰Solidaridad基金会项目"Capacity Building Project on Sustainable Tea in China"(SOL 2010/714)

摘　　要：为快速科学地判定茶叶等级,采用电子舌技术结合HPLC技术研究不同等级霍山黄芽茶的滋味品质及其呈味氨基酸组成。结果表明:电子舌测得特一级茶、一级茶至三级茶的鲜度值和复合滋味值显著递减,HPLC测得特一级茶、一级茶和三级茶的游离氨基酸总量分别为51.92 mg/g、46.45 mg/g和43.01mg/g,各级茶的茶氨酸含量均占游离氨基酸总量的70%以上,特一级茶和一级茶的游离氨基酸总量和茶氨酸含量均与三级茶间的差异显著(P<0.05);单组分氨基酸含量在0.02~29.811mg/g,特一级茶的谷氨酸、丝氨酸、精氨酸、丙氨酸、酪氨酸、异亮氨酸、亮氨酸和赖氨酸等8种主要氨基酸含量明显高于一级茶。茶汤鲜度值与氨基酸含量呈正相关,电子舌可凭借茶叶氨基酸组成和含量区别霍山黄芽茶的等级。The taste quality and delicious amino acid composition of Huoshanhuangya Tea with different grades were determined by the electronic tongue and HPLC to rapidly and scientifically decide tea grade.Results：The umami and complex taste values of Huoshanhuangya Tea with different grades decrease from Special grade 1and Grade 1to Grade 3significantly.Total free amino acid amount of Huoshanhuangya Tea with Special grade 1,Grade 1and Grade 3is 51.92 mg/g,46.45 mg/g and43.01mg/g respectively and the theanine content of Huoshanhuangya Tea with Special grade 1,Grade 1and Grade 3accounts for above 70% of total free amino acid.Total free amino acid and theanine content of Huoshanhuangya Tea with Special grade 1and Grade 1are higher than Huoshanhuangya Tea with Grade 3significantly.The monocomponent amino acid content of Huoshanhuangya Tea with three different grades is 0.02～29.811mg/g.The Glu,Ser,Arg,Ala,Ile,Leu and Lys content of Huoshanhuangya Tea with Special grade 1is higher than Huoshanhuangya Tea with Grade 1obviously.The umami value of tea soup is positively related to amino acid content of tea soup.The electronic tongue can be used to decide the grade of Huoshanhuangya Tea based on amino acid composition and content of Huoshanhuangya Tea.

关 键 词：霍山黄芽茶 电子舌 茶汤滋味 游离氨基酸 茶氨酸 等级判定 

分 类 号：S571.1[农业科学—茶叶生产加工]