英语语法分析

AIM: To study the quality standard on catechu and its extract.

目的：研究儿茶及儿茶提取物的质量标准。

HPLC was used to determine the content of brassinolide in Areca catechu pollen.

采用高效液相色谱(hplc)法测定槟榔花粉中芸苔素内酯的含量。

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。