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Titolo:
The behavior of a poly(aniline) solid contact pH selective electrode basedon N,N,N ',N '-tetrabenzylethanediamine ionophore
Autore:
Han, WS; Park, MY; Cho, DH; Hong, TK; Lee, DH; Park, JM; Chung, KC;
Indirizzi:
Konkuk Univ, Dept Chem, Seoul 143701, South Korea Konkuk Univ Seoul South Korea 143701 ept Chem, Seoul 143701, South Korea Hanseo Univ, Dept Chem, Chungnam 356820, South Korea Hanseo Univ Chungnam South Korea 356820 em, Chungnam 356820, South Korea
Titolo Testata:
ANALYTICAL SCIENCES
fascicolo: 6, volume: 17, anno: 2001,
pagine: 727 - 732
SICI:
0910-6340(200106)17:6<727:TBOAPS>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEUTRAL CARRIER; MEMBRANE ELECTRODES; ION; POTASSIUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Chung, KC Konkuk Univ, Dept Chem, Seoul 143701, South Korea Konkuk Univ Seoul South Korea 143701 Seoul 143701, South Korea
Citazione:
W.S. Han et al., "The behavior of a poly(aniline) solid contact pH selective electrode basedon N,N,N ',N '-tetrabenzylethanediamine ionophore", ANAL SCI, 17(6), 2001, pp. 727-732

Abstract

A hydrogen ion-selective solid-contact electrode based on N,N,N',N'-tetrabenzylethanediamine has shown the best Nernstian slope and selectivity and the widest response range in a Tris buffered pH sample solution. Its linear dynamic range was pH 3.50 - 11.94, and the Nernstian slope showed 52.1 mV/pH (at 20 +/- 0.2 degreesC). When it was directly applied to human whole blood tin pH range 6.0 - 8.5) we could obtain the same satisfying results. This electrode continuously contacted a Tris 7.47 buffered solution, human whole blood and a hydrofluoric acid solution for one month without any loss ofperformance. Also, hydrofluoric acid did not influence the surface of thiselectrode, and thus it was maintained without showing any changes in potentials after being used in a hydrofluoric acid solution. The standard deviation in the determined e.m.f. differences was 1.5 mV (N = 5) for Tris buffersolutions of pH 6.5 and 1.1 mV at a Tris buffer solutions of pH 8.5. The 90% response time of the electrodes obtained by injecting of hydrochloric acid into the Tris buffer sample solution was less than 10 s. Especially, in the this paper, with these potential response characteristics of hydrogen ion selective poly(aniline) solid contact electrode, we have also presented the pH response mechanism of this electrode and the role of poly(aniline) and a doped anion in a poly(aniline) layer.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 08:18:12