Foam separation of anions: Hydration, entropy, and selectivity

R. B. Grieves, D. Bhattacharyya

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


A selectivity coefficient for the foam separation of Fe(CN)6 4- Ag(S2O3)2 3-, Cr2O7 2- S2O3 2- HPO4 2-, and I- from solutions containing ethylhexadecyldimethyl ammonium bromide is related to the absolute partial molal entropy of each ion. The entropy, which correlates well with the degree of hydration, enables an estimate of the selectivity of an ion flotation or foam fractionation by a surfactant.

Original languageEnglish
Pages (from-to)603-612
Number of pages10
JournalAnalytical Letters
Issue number9
StatePublished - Sep 1 1971


  • flotation
  • foam separation selectivity partial molal entropy

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Spectroscopy
  • Clinical Biochemistry
  • Biochemistry, medical
  • Electrochemistry


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