UV spectrophotometry was applied to determine the contents of active tannic acid in catechu and its extract.

采用紫外分光光度法测定儿茶及儿茶提取物中活性鞣质的含量。

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UV spectrophotometry was applied to determine the contents of active tannic acid in catechu and its extract.

采用紫外分光光度法测定儿茶及儿茶提取物中活性鞣质的含量。

youdao