This paper prepared sodium lauryl sulfate with two different methods, and compared the prepared sodium lauryl sulfate's property with standard analytical pure 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。
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。
The problem of bars in pure tension and pure bending will be solved exactly by analytical method.
用解析法精确地求解了杆的纯拉伸和纯弯曲问题。
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