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用薄层扫描法对茶多酚中咖啡因的含量进行测定，方法简便，结果准确，重现性好，平均回收率100．1％，RSD％=2．90，最低检测限为0．lμg。
The content of caffeine in tea polyphenols was determined by TLC scanning. The method was simple, accurate and reproducible. The average recovery was 100.1%, RSD% was 2.90, and the minimum detection limit was 0. Lμg.