ISSN:
1040-0397
Keywords:
Adsorptive stripping voltammetry
;
Ion association complex
;
Ferrocenyl cationic surfactant
;
Anionic surfactant
;
Carbon paste electrode
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Adsorption stripping voltammetry (AdSV) for anionic surfactants was examined, based on ion association with an electroactive ferrocenyl cationic surfactant. The ion association complex between an anionic surfactant and a ferrocenyl cationic surfactant accumulated on the carbon paste electrode (CPE) in the absence of an applied potential. The concentration of anionic surfactant was indirectly evaluated from the oxidation wave of the ferrocenyl cationic surfactant. By means of AdSV, levels of anionic surfactants of 10-7 mol dm-3 could be measured with good selectivity. The role of pasting liquids on the accumulation behavior of ferrocenyl TMA were examined by a comparison of two pasting liquids. The first, 2-nitrophenyl octyl ether (NPOE) was capable of extracting the ferrocenyl TMA salt, while the other, di-n-octylphthalate (DOP) was not. The voltammograms of ferrocenyl TMA varied considerably with the pasting liquids. In particular, the peak potentials at NPOE-CPE gradually shifted with time, as a result of the extraction of the ferrocenyl TMA salt into the CPE. However, the peak potential at DOP-CPE remained constant.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140090913
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