This paper prepared sodium lauryl sulfate with two different methods, and compared the prepared sodium lauryl sulfate's property with standard analyticalpure sample.
介绍了用两种不同的方法制备十二烷基硫酸钠，并对制备出的产物的性能与分析纯的标样进行了比较。
2
The paper describes the analytical methods of trace level hydrocarbon impurities in pure ethene and propene.
本文介绍了聚合级乙烯和丙烯中烃杂质的分析方法。
3
The problem of bars in pure tension and pure bending will be solved exactly by analytical method.