云南化工2012，Vol.39Issue(2)：19-21,3.
普洱生茶和熟茶中咖啡因含量测试
Studies on Caffeine Content in Pu-Er Crude Tea and Pu-Er Ripe Tea
陈靖 1邹艳丽 1李聪 2王波 1谢启明1
作者信息
- 1. 楚雄师范学院化学与生命科学系,云南楚雄675000
- 2. 云南大学化学科学与工程学院,云南昆明650091
- 折叠
摘要
Abstract
Caffein was respectively extracted from 15 kinds of Pu-Er crude tea and 15 kinds of ripe tea by the boiling-water method.The caffein content was respectively determined by the ultraviolet spectrophotometric method,taken caffein as reference standard and the distilled water as the blank control,the absorbance of the reference and test solution was determined at 274 nm and the content of caffein was calculated by using the standard curve.The regression equation was y=47.945x＋0.0015,R2=0.9999（Y and X stand for absorbance and concentration of caffein respectively）,the average percentage composition of caffeine in Pu-Er crude tea was 4.29%,3.31% in Pu-Er ripe tea.The caffeine content of Pu-Er ripe tea is reduced during manufacturing process.关键词
普洱生茶/普洱熟茶/咖啡因Key words
Pu-Er crude tea/Pu-Er ripe tea/caffeine分类
数理科学引用本文复制引用
陈靖,邹艳丽,李聪,王波,谢启明..普洱生茶和熟茶中咖啡因含量测试[J].云南化工,2012,39(2):19-21,3.
