摘要
采用苯酚硫酸法,以葡萄糖作为标准品,对茶中多糖进行提取和含量分析.结果显示在85℃下3%碳酸钠溶液中提取可得最大值,多糖含量可达3%～8%.表明采取比色法测定多糖含量简单、可靠.
To extract and analyze the contents of polysaccharide in three tea power. Using phenol-sulfuric acid and UV spectra to determine the polysaccharide in 490nm. The content of polysaccharide had a good linearity in the range of 10～80μg.ml^(-1) , A=1.3234V+0.2348 , r=0.9993. The average adds the kind recovery rate 99.9%(n=5),RSD=1.30%. Under 85℃ and 3% sodium carbonate solution can get the biggest value the contents of polysaccharide in three tea power can amount to 3%～8%.Conclusion: The method is simple rapid and with a good reproducibility and can be used quantitive analysis method for this preparation.
出处
《喀什师范学院学报》
2005年第3期57-58,共2页
Journal of Kashgar Teachers College
关键词
红茶
绿茶
茯茶
多糖测定
苯酚硫酸法
Black tea
Green tea
Brick tea
Polysaccharide
Phenol-sulfuric acid
