食品科学 ›› 2017, Vol. 38 ›› Issue (17): 145-150.doi: 10.7506/spkx1002-6630-201717024

• 基础研究 • 上一篇    下一篇

基于色差系统的黄茶外观色泽评价模型构建及其关键物质基础分析

王 璟1,2,高 静1,刘思彤1,汪 芳2,戴前颖1,*,许勇泉2,*,尹军峰2   

  1. 1.安徽农业大学 茶树生物学与资源利用国家重点实验室,安徽 合肥 230036;2.中国农业科学院茶叶研究所,浙江 杭州 310008
  • 出版日期:2017-09-15 发布日期:2017-09-12
  • 基金资助:
    中国农业科学院农业创新工程项目(CAAS-ASTIP-2014-TRICAAS);浙江省平阳黄汤品质提升关键技术研究与示范项目(SKZ201302);2015年安徽省重大科技攻关项目(15CZZ03111);浙江省杰出青年基金项目(LR17C160001)

Establishment of an Evaluation Model for Color of Yellow Tea Based on Color Difference and Analysis of Key Pigments

WANG Jing1,2, GAO Jing1, LIU Sitong1, WANG Fang2, DAI Qianying1,*, XU Yongquan2,*, YIN Junfeng2   

  1. 1. State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China;2. Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
  • Online:2017-09-15 Published:2017-09-12

摘要: 基于市售黄茶外观色泽的色差分析结果和感官审评得分,建立色泽指标与外观色泽评分之间的关系函数,并进一步分析其与生化成分含量的相关性。结果表明:不同黄茶在外观色泽上表现出较大的差异,对黄茶的整体品质有极显著影响(P<0.01);由色相(O)值经数据转换所得的色度(Ps)值与外观色泽评分有较好的相关性;建立了Ps值-外观色泽评分的二次拟合模型,经验证,模型准确率为98.9%,Ps值可用于分析黄茶外观色泽品质;Ps值与茶红素含量呈极显著正相关(P<0.01),与总叶绿素含量呈显著负相关(P<0.05),由此可知黄茶干茶的外观色泽与这两种生化成分有关。本实验建立了黄茶外观色泽的色差评价方法,可为黄茶色泽研究提供一定的理论依据。

关键词: 黄茶, 色泽, 色泽评价模型, 相关性

Abstract: Based on the results of color difference and sensory evaluation of commercial yellow tea samples, we established the relationship between color parameters and sensory scores for color, and analyzed the correlation between color and chemical components. The results showed that there was a remarkable difference in color among yellow tea samples, which had a significant influence on the sensory quality of yellow tea (P < 0.01). Good correlation was found between sensory scores for color and chroma (Ps) value, converted from hue value (O) in chromatic aberration system, which was fitted to a quadratic model. The accuracy of the model was found to be 98.9%. Therefore, Ps value could be regarded as an index to evaluate the color quality of yellow tea. Ps value was positively correlated with thearubigins content (P < 0.01) and negatively correlated with chlorophyll content in yellow tea (P < 0.05). Therefore these two components were considered to be related to the color of yellow tea. The model presented in this study can provide a theoretical basis to evaluate the color of yellow tea.

Key words: yellow tea, color, color evaluation model, correlation

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