Potentiometric titration of anionic polyelectrolytes using a cationic surfactant solution as a titrant and a titrant-sensitive plasticized poly(vinyl chloride) membrane electrode

Takashi Masadome, Toshihiko Imato

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    A potentiometric titration method for the direct determination of anionic polyelectrolytes using a plasticized poly(vinyl chloride) membrane electrode is described. A cationic surfactant solution is used as titrant. The method is based on ion association between the anionic polyelectrolyte in the sample and the cationic surfactant in the titrant. The end-point is detected as a sharp potential change due to an increase in the concentration of the free cationic surfactant at the equivalence point. The sharpness of the titration curve at the end-point is compared for several cationic surfactants; a solution of stearyltrimethylammonium ion has been found to be superior.

    Original languageEnglish
    Pages (from-to)538-540
    Number of pages3
    JournalFresenius' Journal of Analytical Chemistry
    Volume358
    Issue number4
    DOIs
    Publication statusPublished - 1997

    All Science Journal Classification (ASJC) codes

    • Biochemistry

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