This analytic method introduced direct alkaline hydrolysis, omitted laborious preliminarypurification steps of samples prior to GC, and the method was simple and convenient.
该方法引入了直接碱水解皂化烟叶及主流烟气粒相组分，省去了一般烟草样品测定中的所需的预分离过程。
2
This paper introduces nanofiltration for nickel plating rinse water treatment in small-scale test, industrial practice and preliminarypurification of nickel sulfate, respectively.
本文主要介绍了用纳滤膜处理电镀镍漂洗水的小试研究、工业实践及硫酸镍初步纯化研究。
3
The paper deals with the preliminary study on the simple purification process of water quality in the estuarine area and gives a simple treatment of water for larval nursing of Penaeus sinensis.