英语语法分析

Methods: Polysaccharide, imperatorin and extractives in different varieties were detected according to document and Chinese Pharmacopeia.

方法：接文献方法和药典规定检测北沙参不同栽培品种的多糖、欧前胡素、浸出物等成分含量。

Result: Total 15 coumarins were separated, the relative contents of oxyimperatorin, imperatorin and isoimperatorin being up to 42.40%, 22.14% and 12.12% respectively.

结果：气相色谱质谱联用技术共鉴定出15种香豆素类成分，主要成分氧化前胡素、欧前胡素、异欧前胡素的相对含量分别达到42 .40 % ，2 2 .14 %和12 .12 % ；

Methods:The total content of coumarins was determined by UV. The content of imperatorin, isoimperatorin and oxypeucedanin hydrate in different samples was carried out by HPLC.

方法：运用紫外分光光度法测定总香豆素含量； HPLC法测定水合氧化前胡素、欧前胡素、异欧前胡素的含量。