APPLICATION OF AN ALL-SOLID-STATE ION-SELECTIVE ELECTRODE FOR THE AUTOMATED TITRATION OF ANIONIC SURFACTANTS

被引：42

作者：

ALEGRET, S ^{[1
]}

ALONSO, J ^{[1
]}

BARTROLI, J ^{[1
]}

BAROROMA, J ^{[1
]}

SANCHEZ, J ^{[1
]}

DELVALLE, M ^{[1
]}

机构：

[1] UNIV AUTONOMA BARCELONA,DEPT QUIM,SENSORS & BIOSENSORS GRP,E-08193 BARCELONA,SPAIN

来源：

ANALYST | 1994年 / 119卷 / 11期

关键词：

ANIONIC SURFACTANT DETERMINATION; SURFACTANT-SELECTIVE ELECTRODE; POTENTIOMETRIC TITRATION; POLY(VINYL CHLORIDE) MEMBRANE ELECTRODE;

D O I：

10.1039/an9941902319

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A poly(vinyl chloride) matrix membrane electrode responsive to anionic surfactants in an all-solid-state graphite-epoxy support was applied to the determination of anionic surfactants by potentiometric titration, using Hyamine 1622 as the titrant, in a pH 2.2 phosphate buffer. The results from this method compare favourably with those of the two-phase mixed indicator titration method for several commercial anionic surfactants (alkylsulfates, alkylbenzenesulfonates, alpha-alkene sulfonates, alkyl ether sulfates and sulfosuccinates). The performance characteristics improve the commercially available surfactant electrodes: the standard deviation for the titration of 4 mmol dm(-3) dodecylsulfate with 4 mmol dm(-3) titrant is 0.15% (n = 23), the relative standard deviation of the end-point potential is 0.95% and the average value of the potential jump is 140 mV, which allows for the titration of surfactants at concentrations down to 10 mu mol dm(-3) and shows its applicability in routine analysis.

引用

页码：2319 / 2322

页数：4

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