通过对甘薯叶、茎中的总黄酮含量进行了提取，以芦丁为对照品，用紫外分光光度计对其含量进行了初步测定。

This paper reported the extraction and the preliminary determination of flavonoids in sweet potato leaves and stems by UV-spectrophotometry using rutin as comparison sample.

youdao

目的 比较侧柏叶生品和炭品中鞣质的含量。

Objective To compare the tannin contents of Platycladus orientalis (L. ) Franco and its carbonisatus.

youdao