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Titolo:
Ion-transfer stripping voltammetry of polyoxyethylene alkyl and alkylphenyl ether surfactants at the organic-gel vertical bar water interface and itsapplication to trace analysis
Autore:
Katano, H; Senda, M;
Indirizzi:
Fukui Prefectural Univ, Dept Biosci, Fukui 9101195, Japan Fukui Prefectural Univ Fukui Japan 9101195 Biosci, Fukui 9101195, Japan
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 496, anno: 2001,
pagine: 103 - 109
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPLEX-FORMATION; POLY(OXYETHYLENE) DERIVATIVES; NITROBENZENE/WATER INTERFACE; NONIONIC SURFACTANTS; POLYETHER COMPLEXES; DROPPING ELECTRODE; METAL IONS; 1,4,7,10,13,16-HEXATHIACYCLOOCTADECANE; 1,2-DICHLOROETHANE; POLAROGRAPHY;
Keywords:
ion-transfer voltammetry; stripping voltammetry; assisted transfer; non-ionic surfactants; Organic-gel vertical bar water interface; trace analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Katano, H Fukui Prefectural Univ, Dept Biosci, Matsuoka Cho, Fukui 9101195, Japan Fukui Prefectural Univ Matsuoka Cho Fukui Japan 9101195 , Japan
Citazione:
H. Katano e M. Senda, "Ion-transfer stripping voltammetry of polyoxyethylene alkyl and alkylphenyl ether surfactants at the organic-gel vertical bar water interface and itsapplication to trace analysis", J ELEC CHEM, 496(1-2), 2001, pp. 103-109

Abstract

Stripping voltammetric behavior of the transfer of poly(oxyethylene) alkyland alkylphenyl ether non-ionic surfactants at trace level at the organic-gel \ water (O-gel \ W) interface has been studied using normal pulse voltammetry (NPV) and pulse amperometry (PA). The method is based on the metal cation-assisted transfer of surfactant into O-gel in an anodic way, that is,pre-electrolysis, to form a metal cation-surfactant complex in O-gel whichis followed by its transfer back into the test solution (W) in a cathodic way by NPV or PA. In the presence of Na+ or Ca2+ ion in W, heptaoxyethylenedodecyl ether gave well-defined cathodic stripping current versus potential curves by NPV. The stripping limiting current as determined by PA was proportional to a concentration of the surfactant in W as low as 10 nM. Other poly(oxyethylene) non-ionic surfactants (NSs, (DP) over bar = 10 similar to38, (DP) over bar being the degree of polymerization) also gave well-defined stripping voltammograms at the O-gel \ W interface in the presence of Ca2+ ion. The stripping limiting currents of NSs of (DP) over bar larger than16 were found to depend on (DP) over bar and the voltammetric conditions, such as the pre-electrolysis potential and the concentration of the assisting cation in W. The result can be explained by theoretical equations in which the formation of a binuclear metal cation-NS complex in addition to a mononuclear one is taken into consideration. Dodecylsulfate and dodecylbenzenesulfonate anionic surfactants in W also gave well-defined voltammograms atthe O-gel \ W interface. Their half-wave potentials are well separated from those of the cation-assisted transfer of NSs, indicating potential advantages of the voltammetric method for the separate determination of non-ionicand anionic surfactants simultaneously. (C) 2001 Elsevier Science B.V. Allrights reserved.

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Documento generato il 30/11/20 alle ore 11:50:23