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表面活性剂(包括阴、阳离子和非离子性表面活性剂)已經在印染、香料、药物、矿石浮选、金属防腐等工业中得到广泛的应用。到目前为止,对阳离子活性剂(作为商品或原材料)的含量分析已提出了很多方法,例如定氮法、定有机氯法、磷钼酸鹽、黄血鹽、重鉻酸鹽等沉淀法、极譜分析法以及与染料滴定生成絡合物的方法等。1948年,白尔(Barr)等提出若以溴酚藍为指示剂,阴、阳离子活性剂可以定量地在两液相中进行分配滴定(Partition titration)。这个方法对于阴、阳离子活性剂商
Surfactants (including anionic, cationic and nonionic surfactants) have been widely used in industries such as printing and dyeing, perfumes, pharmaceuticals, ore flotation and metal corrosion protection. Hitherto, many methods have been proposed for content analysis of cationic active agents (as commercial products or raw materials), for example, precipitation methods such as nitrogen fixation, organic chlorine method, phosphomolybdate, yellow blood salt, dichromate, Polarographic analysis and dye titration with complex formation methods and so on. In 1948, Barr et al. Proposed that if bromophenol blue is used as an indicator, the anionic and cationic agents can be quantitatively titrated in two liquid phases. This method for the anion and cation active agent