FIA of cationic surfactants using plasticized polyvinyl chloride membrane electrode

Takashi Masadome, Toshihiko Imato, Nobuhiko Ishibashi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A flow system for the determination of cationic surfactants in the presence of anionic surfactant is proposed. The system consists of a microcolumn packed with anion-exchange resin and a surfactant-selective polyvinyl chloride membrane electrode detector. The membrane was plasticized with phthalic acid di(2-ethylhexyl) ester. Anionic surfactants were removed by the anion-exchange resin column. The cationic surfactant was eluted by methanol/H2O = 50/50(v/v, %) and detected. The electrode detector showed the linear response with a potential slope of 45 mV/decade for dodecyltrimethylammo-nium (DTA) ion from 5×10-7 to 1×10-5M. The detection limit for DTA was 1.0×10-8 M. The proposed method was free from interferences from coexisting inorganic electrolytes, anionic surfactants and nonionic surfactants. By this method, a trace level of cationic surfactants in river water could be determined.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalBunseki Kagaku
Volume40
Issue number1
DOIs
Publication statusPublished - 1991
Externally publishedYes

Keywords

  • cationic surfactant
  • FIA
  • ion selective electrode
  • micro column packed with ion exchange resin

ASJC Scopus subject areas

  • Analytical Chemistry

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