英语语法分析

The preparation of sodium metasilicate pentahydrate using aqueous crystallization method is studied.

对采用溶液结晶法制取五水偏硅酸钠进行了研究。

The decomposition temperature and heat of cefazolin sodium pentahydrate were measured by the differential scanning calorimetry technique.

采用差热分析法测定头孢唑林钠的分解温度和分解热；

Compared the catalytic activity of ferric chloride hexahydrate, stannic chloride pentahydrate and sodium bisulfate monohydrate for synthesis of nerolin bromelia.

比较了六水三氯化铁、五水四氯化锡和一水硫酸氢钠催化合成橙花素的催化活性。