Titrimetric determination of anionic surfactant content in anionic/nonionic surfactant mixture solution by anionic surfactant selective electrode

Authors : Junwei WANG, Zhiping DU, Wanxu WANG, Wei XUE

Pages : 545-555

Doi:10.3906/sag-1211-31

View : 14 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A new polyvinyl chloride insert ignore into journalissuearticles values(PVC); membrane electrode for determining the concentration of sodium dodecylsulfate insert ignore into journalissuearticles values(SDS); based on a neutral ion pair complex of dodecyltrimethylammonium-dodecylsulfate insert ignore into journalissuearticles values(DTA+DS-); as ionophore is described in this paper. The construction and characteristic performance of the PVC membrane electrode displays a Nernstian slope of --56.9 \pm 0.3 mV/decade in the concentration range of 2.0 \times 10-6 to 3.2 \times 10-3 mol L-1 and a detection limit of 1.6 \times 10-6 mol L-1. The lifetime of the electrode is more than 3 months without showing significant change in the values of slope or linear concentration range. The electrode has wide pH range of application and short response time. The electrode shows selective response to DS- and poor response to common anions except DBS-. The electrode was used as an end point indicator electrode for the determination of SDS content in sodium dodecylsulfate/nonylphenol ethoxylates insert ignore into journalissuearticles values(SDS/NP-10); mixture solution by potentiometric titration using Hyamine standard solution as titrant. The maximum mol ratio insert ignore into journalissuearticles values(ninsert ignore into journalissuearticles values(NP-10);: ninsert ignore into journalissuearticles values(SDS);); when SDS cannot be determined in SDS/NP-10 mixture solution can be obtained.
Keywords : Anionic surfactant selective electrode, anionic surfactant, mixture solution, potentiometric titration