辐照杀菌对绿茶品质的影响

本文研究了辐照对绿茶主要品质成分、重金属、农药残留及感官品质变化的影响。结果表明:辐照对茶叶中粗蛋白、茶多酚、咖啡碱、重金属元素无显著影响,可溶性糖、氨基酸有一定的影响。氯氰菊酯含量随辐照剂量的增加呈下降趋势,5kGy以下剂量辐照茶叶对绿茶色泽、汤色、滋味、香气无明显影响。根据品质因素综合分析确定,辐照茶叶的适宜剂量为3~5kGy。

EFFECT OF IRRADIATION DECONTAMINATION ON THE QUALITIES OF GREEN TEA

The purpose of this study was to analyze the effects of irradiation on the main chemical components, such as heavy metal elements, pesticide residues as well as sensory qualities of green tea. The results indicated that irradiation had no significant impact on protein, tea polyphenols, theine and heavy metal elements, slight differences in the contents of soluble sugar and amino acids. The content of cypermethrin reduced with the increase of irradiation dose. The color, liquor color, flavor and aroma of the tea decoction changed slightly when irradiated at the dose lower than 5kGy. It was concluded that the optimal doses for the purpose of green tea decontamination was at the range of 3～5kGy according to the analysis of various quality factors.