Flow injection analysis of nonionic surfactants with plasticized poly(vinyl chloride) membrane electrode detector

Takashi Masadome, Nobuhiko Ishibashi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

An electrode based on a poly(vinyl chloride) membrane plasticized with o-nitrophenyl octyl ether, which contains no ion-exchange site, was used as an indicator electrode in FIA of nonionic surfactants. The flow injection manifold was composed of a two-channel system. The sample solution (100 μl) was injected into a sample carrier stream (water), and merged with a stream of baseline potential supporting electrolyte solution (BLSS). The carrier and BLSS were pumped at a flow rate of 1.1 ml/min. The electrode responds to cationic complexes formed between metal ion in BLSS and nonionic surfactants in sample. The electrode detector showed the cationic response with a slope of 25 mV per decade for Triton X-100 from 10-4 M to 10-3 M, when the mixture of 0.1 M BaCl2 or 0.1 M CaCl2 and 10-5 M sodium dodecyl sulfate (NaDS) was used as BLSS. However, the electrode detector showed the cationic potential response with a slope of 45 mV per decade for Triton X-100 from 10-3 M to 10-1 M, when the mixture of 0.1 M NaCl and 10-5 M NaDS was used as BLSS. The response of the detector to other several nonionic surfactants such as poly (ethylene glycol) mono-p-nonylphenyl ether (n = 15, 18) and poly (ethylene glycol) dodecyl ether (n = 7, 25) was similar to that for Triton X-100, when the mixture of 0.1 M NaCl and 10-5 M NaDS was used as BLSS. The detection limit for Triton X-100 became lower with increase of the concentration of NaDS in BLSS. Coexistence of common inorganic electrolytes less than 10-2 M essentially gave no disturbance on the determination of nonionic surfactants. The ionic surfactants, however, gave serious interferences.

Original languageEnglish
Pages (from-to)519-522
Number of pages4
JournalBunseki Kagaku
Volume39
Issue number9
DOIs
Publication statusPublished - 1990
Externally publishedYes

Fingerprint

Vinyl Chloride
Nonionic surfactants
Electrolytes
Detectors
Membranes
Electrodes
Octoxynol
Ether
Polyethylene glycols
Surface-Active Agents
Sodium Dodecyl Sulfate
Metal ions
Ion exchange
Flow rate
Water

Keywords

  • determination of nonionic surfactant
  • FIA
  • o-nitrophenyl octyl ether-plasticized PVC membrane electrode
  • potentiometry

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Flow injection analysis of nonionic surfactants with plasticized poly(vinyl chloride) membrane electrode detector. / Masadome, Takashi; Ishibashi, Nobuhiko.

In: Bunseki Kagaku, Vol. 39, No. 9, 1990, p. 519-522.

Research output: Contribution to journalArticle

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