Abstract
A potentiometric back-titration method for the determination of sulfate ions using a plasticized poly(vinyl chloride) membrane electrode without added ion-exchanger is described. A solution of a derivative of tetraphenylborate is used as titrant. The method is based on the ion association between an excess of 2-aminoperimidinium added to the sulfate containing sample and the tetraphenylborate derivative in the titrant. The titration end-point is detected as a sharp potential change due to an increase in the concentration of the free tetraphenylborate derivative at the equivalence point. The sharpness of the titration curve at the end-point is compared for two tetraphenylborate derivatives. Good results are obtained with a solution of sodium tetrakis (4-fluorophenyl) borate.
| Original language | English |
|---|---|
| Pages (from-to) | 423-425 |
| Number of pages | 3 |
| Journal | Fresenius' Journal of Analytical Chemistry |
| Volume | 362 |
| Issue number | 4 |
| Publication status | Published - 1998 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Biochemistry
Cite this
Potentiometric back-titration of sulfate ion using a tetraphenylborate derivative as a titrant and a titrant-sensitive plasticized poly(vinyl chloride) membrane electrode. / Masadome, Takashi; Asano, Yasukazu.
In: Fresenius' Journal of Analytical Chemistry, Vol. 362, No. 4, 1998, p. 423-425.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Potentiometric back-titration of sulfate ion using a tetraphenylborate derivative as a titrant and a titrant-sensitive plasticized poly(vinyl chloride) membrane electrode
AU - Masadome, Takashi
AU - Asano, Yasukazu
PY - 1998
Y1 - 1998
N2 - A potentiometric back-titration method for the determination of sulfate ions using a plasticized poly(vinyl chloride) membrane electrode without added ion-exchanger is described. A solution of a derivative of tetraphenylborate is used as titrant. The method is based on the ion association between an excess of 2-aminoperimidinium added to the sulfate containing sample and the tetraphenylborate derivative in the titrant. The titration end-point is detected as a sharp potential change due to an increase in the concentration of the free tetraphenylborate derivative at the equivalence point. The sharpness of the titration curve at the end-point is compared for two tetraphenylborate derivatives. Good results are obtained with a solution of sodium tetrakis (4-fluorophenyl) borate.
AB - A potentiometric back-titration method for the determination of sulfate ions using a plasticized poly(vinyl chloride) membrane electrode without added ion-exchanger is described. A solution of a derivative of tetraphenylborate is used as titrant. The method is based on the ion association between an excess of 2-aminoperimidinium added to the sulfate containing sample and the tetraphenylborate derivative in the titrant. The titration end-point is detected as a sharp potential change due to an increase in the concentration of the free tetraphenylborate derivative at the equivalence point. The sharpness of the titration curve at the end-point is compared for two tetraphenylborate derivatives. Good results are obtained with a solution of sodium tetrakis (4-fluorophenyl) borate.
UR - http://www.scopus.com/inward/record.url?scp=25144502625&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=25144502625&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:25144502625
VL - 362
SP - 423
EP - 425
JO - Fresenius Zeitschrift fur Analytische Chemie
JF - Fresenius Zeitschrift fur Analytische Chemie
SN - 0016-1152
IS - 4
ER -