Recent advances in microemulsion electrokinetic chromatography

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Abstract
Microemulsion electrokinetic chromatography (MEEKC) is an electrodriven separation technique. Separations are typically achieved using oil‐in‐water microemulsions, which are composed of nanometre‐sized droplets of oil suspended in aqueous buffer. The oil droplets are coated in surfactant molecules and the system is stabilised by the addition of a short‐chain alcohol cosurfactant. The novel use of water‐in‐oil microemulsions for MEEKC separations has also been investigated recently. This report summarises the different microemulsion types and compositions used to‐date and their applications with a focus on recent papers (2002–2004). The effects of key operating variables (pH, surfactant, cosurfactant, oil phase, buffer, additives, temperature, organic modifier) and methodology techniques are described.

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