一种新的阴离子表面活性剂电极的研制及应用

A New PVC-Coated Carbon Rod Electrode for Anionic Surfactants and its Application in Environmental Monitoring

研制出一种新的阴离子表面活性剂电极，电极膜最佳组成：ＴＨＤＡ－ＤＢＳ５ｍｇ，ＤＢＰ０．４ｍｌ，ＮＢ０．３ｍｌ，ＰＶＣ粉０．２ｇ，电极线性范围１×１０（－３）－８．１×１０（－７）ｍｏｌ／Ｌ，级差５８ｍＶ／ｄｅｃ，对ＤＢＳ和ＳＤＳ检测限分别为５．６×１０（－７），ｍｏｌ／Ｌ和７．４×１０（－７）ｍｏｌ／Ｌ。电极制作简单，成本低廉，性能稳定，已用于环境水样中阴离子表面活性剂的快速准确测定。

A new anionic surfactant selective electrode prepared by Coating a graphite rod with PVC compound.containing triheptyl-dedecyl ammonium and dodecylbenzene sulfonate THDA-DBS is deveped.The optimum coating membrane composition is THDA-DBS 5 mg,DBP 0.4 ml,NBO.3ml and PCC 0.2 g.The electrode exhibits nernstain response to the surfactant anions over the concentration range 1×10-3 to 8.1×10-7 mol/Lwith a slope of 58 mV per decade.The detection limits are 5.6×10-7 mol/L for DBS and 7.4×10-7 mol/L fad SDS.The electrode shows high stability and selectivity,and it is easy to make and 4ore,and inexpensive.The electrode has been used sucCeSSfully for the determination of anionic aetergents in environmental water samples.