Studies on the Microwave Treatment Effect on the Structures of Caffeine and Tea-polysaccharide in Tea

Abstract

Abstract: By using mid -grade and lowgrade green tea as rawmaterial,the chemical structures of caffeine and tea -polysaccharide extracts by mic rowave treatment were studied in the paper.By using purified water as the solvent,tea was extractedunder mic rowave treatment,thenthe greentea was leached3times withpurifiedwater.The caffeine and the -polysaccharid e were separated fromthe extracted s olution and purified.The results of the analysis of UV -Vis and IRshowed that the microwave had no effecf on the chemical structures of caffeine and tea -polysaccharide.

Key words: microwave, tea, caffeine, tea -poly sacharide, structure

WANG Xing-Ping, ZHOU Zhi, MO Kai-Ju, ZHANG Jia-Nian. Studies on the Microwave Treatment Effect on the Structures of Caffeine and Tea-polysaccharide in Tea[J]. FOOD SCIENCE, 2003, 24(3): 44-46.

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Studies on the Microwave Treatment Effect on the Structures of Caffeine and Tea-polysaccharide in Tea

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