Ion flotation of dichromate and of complexed cyanide: Surfactants for qualitative analysis

Robert B. Grieves, Jitendra K. Ghosal, Dibakar Bhattacharyya

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10 Scopus citations

Abstract

Ion flotation studies have shown that a surface-active agent is useful for qualitative analysis of complex ions in dilute aqueous solution, with the surfactant forming a particulate complex with the complex ion of concern. Experiments with a monovalent, cationic surfactant have established the prevalence of Cr2O72- (HCrO4-) and not CrO42-; of [Fe(CN)6]4- and [Fe(CN)5H2O]3-; and of [FeFe(CN)6]2- and not [FeFe(CN)6]- or [Fe(CN)6]3-. The results can be contrasted to those with ions that do not form particulate complexes with the surfactant, such as HPO42- and phenolate; with the latter, no qualitative analytical information can be gained. Ion flotation appears to be a promising technique in general for the determination of ionic species present in aqueous solution; the surfactant must react with the ion of significance to form a particulate complex and the initial surfactant concentration must be controlled carefully.

Original languageEnglish
Pages (from-to)591-593
Number of pages3
JournalJournal of the American Oil Chemists' Society
Volume45
Issue number9
DOIs
StatePublished - Sep 1968

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Organic Chemistry

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