乌龙茶提取物辐照杀菌工艺研究  

Good Irradiation Practice for the Control Microflora in Oolong-tea Extract Powder

作　　者：罗志平[1] 邓钢桥[1] 李文革[1] 王芊[1] 彭玲[1] 张勇[1] 

机构地区：[1]湖南省原子能农业应用研究所,湖南长沙410125

出　　处：《湖南农业科学》2007年第2期114-116,共3页Hunan Agricultural Sciences

基　　金：湖南省农业科学院重点学科资助项目

摘　　要：为制订乌龙茶提取物的辐照杀菌工艺,采用60Co-γ对乌龙茶提取物进行了辐照处理,结果表明:乌龙茶提取物中污染微生物的D10值为2 kGy;吸收剂量10 kGy以下(含)辐照对乌龙茶提取物的感观品质无明显影响,对其中的氨基酸和茶黄素含量的影响也不明显;辐照对乌龙茶提取物中的茶多酚、咖啡碱和茶红素、茶褐素的含量均存在一定影响。综合以上因素,推荐乌龙茶提取物辐照杀菌的最低有效剂量为4 kGy,最高耐受剂量为6 kGy。Effects of ^60Co γ-ray irradiation on sterilization and the function components in oolong-tea extract powder were investigated. The results indicated that the D10 value of contaminated micro-organism in this extract was 2 kGy. There was no significant effect on the color and aroma of the tea under the irradiation dose of 10 kGy. There were sterilization significantly affected the contents of tea polyphenols, caffeine, thearubigins and theaflavin. Based on the data of sterilization and product quality, 4 kGy irradiation was recommended for the minimum effective dose, and 6 kGy was the maximum tolerance dose.

关 键 词：乌龙茶提取物 D10值 辐照杀菌 工艺研究 

分 类 号：S571.137[农业科学—茶叶生产加工]