摘要
研究了4,4′-(2-氯-4-硝基重氮氨基)联苯与阳离子表面活性剂氯化十六烷基吡啶发生显色反应,提出了光度法测定氯化十六烷基吡啶的新方法。实验结果表明,在碱性介质中,4,4′-(2-氯-4-硝基重氮氨基)联苯与氯化十六烷基吡啶形成1∶2紫红色离子缔合物,最大吸收波长位于570 nm处,表观摩尔吸光系数为2.16×104L·mol-1.cm-1。表面活性剂的浓度在0～3.0×10-5mol/L范围内符合比耳定律。方法可直接应用于合成水样中阳离子表面活性剂的测定。
In this paper,the colour reaction of CPC with 4,4′-Di（2-chloro-4-nitrophenyl-diazoamino）biphenyl（CNDADP） has been studied.The results show that in the medium of pH10.6,CNDADP reacts with CPC to form a purple-red ion pair complex with the molar ratio of 1：2.The ion pair complex exhibits maximum absorption at 570nm with a molar absorptivity of 2.16×104L·mol-1·cm-1,and Beer＇s law is obeyed in the range of 0～3.0×10-5 mol/L.The method has been applied to the determination of micro CPC in water samples with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2011年第7期91-94,共4页
Chinese Journal of Analysis Laboratory
