Abstract
The separation of 13 aniline derivatives by micellar electrokinetic chromatography (MEKC) with four anionic surfactants was demonstrated. We used sodium dodecyl sulfate (SDS), sodium N-lauroyl- N-methyl-β-alaninate (ALE), sodium N-lauroyl- N-methyltaurate (LMT) and sodium laurylsulfoacetate (LSA) as surfactants. The first application of LSA to MEKC was described. The surfactants having amido linkages, ALE and LMT, gave better separation than SDS. LSA has an ester linkage and its ionic group is sulfonate. Separation with LSA was also better than that with SDS. LSA showed different selectivity from the other surfactants. The effect of the linkages on migration behavior was investigated.
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