现代食品科技2024，Vol.40Issue(3)：172-181,10.DOI:10.13982/j.mfst.1673-9078.2024.3.0432
普洱生茶贮藏过程中品质指标的规律变化分析
Analysis of Changes in Quality Indicators during Storage of Raw Pu-erh Tea
摘要
Abstract
In this study,18 raw Pu-erh tea samples with storage times of 3 to 20 years were selected to investigate the changes in quality indicators of raw Pu-erh tea during storage through sensory evaluation and physicochemical composition analysis.The results showed that with increasing storage time,the color of raw Pu-erh tea gradually deepened,while the fresh aroma transformed into an aged fragrance.Simultaneously,the flavor changed from mellow and rich to mellow and neutral,and the color of the leaf bottom turned darker.The sensory quality was seen to improve after storage for 10 years and above,but began to decline after 18 years of storage.The water extract components,caffeine,GC,C,and CG showed irregular changes,while the concentration of gallic acid gradually increased.The contents of free amino acids,EGC,EC,EGCG,GCG,and ECG showed a decreasing trend with increasing storage time.Seventeen quality indicators were standardized and the samples were subjected to correlation analysis,principal component analysis,and cluster analysis that revealed significant correlations among the quality indicators.The tea samples could be divided into five categories by systematic clustering and could be clustered into one category every 3～4 years.In particular,category A had the highest composite score,followed by category D,while category E had the lowest score.Although the quality indicators show a decreasing trend with the increase in number of storage years,they remained stable during 3～4 years of storage.The results provide a basis for an in-depth study on the quality changes of raw Pu-erh tea during storage.关键词
普洱生茶/理化成分/变化规律/相关性分析/主成分分析/聚类分析Key words
raw Pu-erh tea/physicochemical composition/variation pattern/correlation analysis/principal component analysis/cluster analysis引用本文复制引用
焦婷婷,师梦楠,罗慧,王庆华,王白娟,阮殿蓉,周玲,熊昌云..普洱生茶贮藏过程中品质指标的规律变化分析[J].现代食品科技,2024,40(3):172-181,10.基金项目
云南省"万人计划"高技能人才专项基金(YNWR-SXJS-2018-034) （YNWR-SXJS-2018-034）
