英语语法分析

Objective: To study on the character of alliinase in onion.

目的：对洋葱中蒜氨酸酶的性质进行研究。

Ultimately, alliinase was purified up to 20.68 times with a recovery of 38.53% by HA chromatography.

最后经HA柱层析，得到高纯度的蒜氨酸酶，最终纯化倍数为20.68倍，回收率为38.53%。

Objective: To develop HPLC-MS method for detecting catalytic reaction products of alliin by alliinase.

目的：建立蒜酶催化蒜氨酸反应产物的HPLC-MS分析方法。