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Journal of biochemical and biophysical methods 1999-Jan

Fast separation of 16 seizure drug substances using non-aqueous capillary electrophoresis.

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I Bjørnsdottir
S H Hansen

Keywords

Abstract

A fast and simple method for separation of 16 seizure drug substances using capillary electrophoresis in a non-aqueous separation medium is described. The separation medium consists of a mixture of acetonitrile, methanol and glycerol with ammonium acetate/acetic acid as the electrolyte. The analytes are detected by UV detection at 214 nm. Injection from the detection end (8.5 cm to detector) combined with the usage of a short capillary (32.5 cm total length) makes it possible to separate all 16 amines within 2 min. The choice of solvents, electrolytes and viscosity increasing additives are discussed with special emphasis to their influence on the separation selectivity.

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