METHOD: With diazepam as the internal standard, a two step extraction was performed with tert butyl methyl ether. 方法:取血浆300μl,以地西泮为内标,采用有机相(叔丁基甲醚)两步提取。
A method for determination of the molecular weight distribution, which shows the internal quality of AEO products, of nonionic surfactants of dodecyl polyoxyethylene ether ( AEO) was studied. 对非离子表面活性剂十二醇聚氧乙烯醚(AEO)产品的内在质量&分子量分布的测定方法进行了研究。
The internal flow drag reduction property of inwall of lower adhesive work was investigated by treating the inwall of glass conduit with absolute diethyl ether solution of vinyl triethoxy silicane to depress the adhesive work between the inwall and fluid water. 以乙烯基三乙氧基硅烷无水乙醚溶液处理玻璃管道内壁,降低流体水与管壁间的粘附功,研究了低粘附功内壁管道的内流减阻性能。