The use novel water-in-oil microemulsions in microemulsion electrokinetic chromatography

Kevin D. Altria, Margo F. Broderick, Sheila Donegan, Joe Power

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


We describe the novel use of water-in-oil (W/O) microemulsions to achieve unique separations in microemulsion electrokinetic chromatography (MEEKC). The choise and concentration of the buffer type, surfactant and co-surfactant were all examined and optimized. Separations of a range of neutral and acidic analytes was shown to be markedly different to that obtained by (oil-in-water) O/W MEEKC. Neutral solutes are separated by virtue of their solubility (log P) values in O/W MEEKC with the more water-insoluble solutes migrating last. This separation process does not occur in W/O, as neutral solutes are not separated in order of log P.

Original languageEnglish
Pages (from-to)645-652
Number of pages8
Issue number4-5
Publication statusPublished - Feb 2004


  • Microemulsion electrokinetic chromatography
  • Water-in-oil emulsion


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