Ion-selective electrode for bismuth(III) in ethylenediamintetraacetate medium
de Souza Teixeira, MF; Pinto, AZ; Fatibello-Filho, O
HERO ID
1332555
Reference Type
Journal Article
Year
1997
Language
English
PMID
| HERO ID | 1332555 |
|---|---|
| In Press | No |
| Year | 1997 |
| Title | Ion-selective electrode for bismuth(III) in ethylenediamintetraacetate medium |
| Authors | de Souza Teixeira, MF; Pinto, AZ; Fatibello-Filho, O |
| Journal | Talanta |
| Volume | 45 |
| Issue | 2 |
| Page Numbers | 249-255 |
| Abstract | A coated graphite-epoxy ion-selective electrode for bismuth(III), based on the ion-pair between the [Bi(EDTA)](-) anion and tricaprylylmethylammonium cation (Aliquat 336S) incorporated onto a poly(vinylchloride) (PVC) matrix is constructed. A thin membrane film of this ion-pair, dibutylphthalate (DBPh) or ortho-nitrophenyloctylether (o-NPOE) in PVC was deposited directly onto a Perspex(R) tube which contained a graphite-epoxy conductor substrate attached to the end of a glass tube. The coating solution was prepared by dissolving 30% (w/w) of PVC in 10 ml of tetrahydrofuran following addition of 65% (w/w) DBPh or o-NPOE and 5% (w/w) of the ionic pair. The effect of pH, EDTA concentration and some cation and anion on the electrode response is investigated. The bismuth(III) ion-selective electrode shows a linear response in the bismuth(III) concentration range from 1.0 x 10(-8) to 1.0 x 10(-1) mol 1(-1) and 1.0 x 10(-7) to 1.0 x 10(-1) mol 1(-1) and a slope of 56.8 and 59.2 mV dec.(-1) for the polymeric membranes containing DBPh and o-NPOE, respectively. The lifetime of this electrode was superior to 1 year (over 1600 determinations for each polymeric membrane), with practical detection limits of 6.3 x 10(-9) and 4.4 x 10(-8) mol 1(-1) with these plasticizers. Application of this electrode with bismuth(III) determination in a stomach anti-acid sample is described. |
| Doi | 10.1016/s0039-9140(97)00127-6 |
| Pmid | 18966999 |
| Wosid | WOS:A1997YG86300003 |
| Url | http://www.sciencedirect.com/science/article/pii/S0039914097001276 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Coated graphite-epoxy ion-selective electrode; Bismuth(III); Potentiometry |
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