Effect of hydrophobicity of marker anions on the sensitivity of end-point detection for potentiometric titrations of anionic polyelectrolytes

Takashi Masadome, Toshihiko Imato

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A potentiometric titration method is described for the determination of anionic polyelectrolytes using a marker anion and a plasticized poly (vinyl chloride) membrane electrode sensitive to this marker anion. A solution of an anionic polyelectrolyte, such as potassium poly (vinyl sulfate) (PVSK) added the marker ion has been titrated with a solution of poly (diallyldimethylammonium chloride) (Cat-floc). The end-point has been detected as a sharp potential change due to the rapid decrease in the concentration of the marker ion caused by its association with the titrant, Cat-floc. The sharpness of the endpoint of the titration curve has been compared for several marker ions and the dodecylbenzenesulfonate ion was found to be the best among the marker anions studied.

Original languageEnglish
Pages (from-to)596-597
Number of pages2
JournalFresenius' Journal of Analytical Chemistry
Volume352
Issue number6
DOIs
Publication statusPublished - 1995 Jan
Externally publishedYes

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Hydrophobicity
Polyelectrolytes
Titration
Anions
Ions
Vinyl Chloride
Sulfates
Potassium
Association reactions
Membranes
Electrodes
poly-N,N-dimethyl-N,N-diallylammonium chloride

ASJC Scopus subject areas

  • Biochemistry

Cite this

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abstract = "A potentiometric titration method is described for the determination of anionic polyelectrolytes using a marker anion and a plasticized poly (vinyl chloride) membrane electrode sensitive to this marker anion. A solution of an anionic polyelectrolyte, such as potassium poly (vinyl sulfate) (PVSK) added the marker ion has been titrated with a solution of poly (diallyldimethylammonium chloride) (Cat-floc). The end-point has been detected as a sharp potential change due to the rapid decrease in the concentration of the marker ion caused by its association with the titrant, Cat-floc. The sharpness of the endpoint of the titration curve has been compared for several marker ions and the dodecylbenzenesulfonate ion was found to be the best among the marker anions studied.",
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T1 - Effect of hydrophobicity of marker anions on the sensitivity of end-point detection for potentiometric titrations of anionic polyelectrolytes

AU - Masadome, Takashi

AU - Imato, Toshihiko

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N2 - A potentiometric titration method is described for the determination of anionic polyelectrolytes using a marker anion and a plasticized poly (vinyl chloride) membrane electrode sensitive to this marker anion. A solution of an anionic polyelectrolyte, such as potassium poly (vinyl sulfate) (PVSK) added the marker ion has been titrated with a solution of poly (diallyldimethylammonium chloride) (Cat-floc). The end-point has been detected as a sharp potential change due to the rapid decrease in the concentration of the marker ion caused by its association with the titrant, Cat-floc. The sharpness of the endpoint of the titration curve has been compared for several marker ions and the dodecylbenzenesulfonate ion was found to be the best among the marker anions studied.

AB - A potentiometric titration method is described for the determination of anionic polyelectrolytes using a marker anion and a plasticized poly (vinyl chloride) membrane electrode sensitive to this marker anion. A solution of an anionic polyelectrolyte, such as potassium poly (vinyl sulfate) (PVSK) added the marker ion has been titrated with a solution of poly (diallyldimethylammonium chloride) (Cat-floc). The end-point has been detected as a sharp potential change due to the rapid decrease in the concentration of the marker ion caused by its association with the titrant, Cat-floc. The sharpness of the endpoint of the titration curve has been compared for several marker ions and the dodecylbenzenesulfonate ion was found to be the best among the marker anions studied.

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