Cationic diazacrown ether for the separation of positional isomers by capillary electrophoresis |
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Authors: | Mori M Tsue H Tanaka S |
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Institution: | Division of Material Science, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Japan. |
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Abstract: | The use of a positively charged diazacrown ether, N,N,N',N'-tetramethyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane dichloride (1), in capillary electrophoresis is reported, for the first time. The addition of the cationic diazacrown 1 to the running buffer permitted the successful separation of positional isomers of aromatic anions such as naphthalenedisulfonate, naphthalenedicarboxylate and phthalate. At a concentration of 1 of 2 mM, all the analyte anions were completely separated in less than 5 min. The ion association constants of the solute anions with diazacrown 1 were evaluated and the findings are discussed. |
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