Abstract
Capillary electrophoresis (CE) is a powerful technique for enantioseparations due to its high separation efficiency, high versatility, speed of analysis and low consumption of samples and reagents. Non-aqueous capillary electrophoresis (NACE) appears as a promising technique to perform enantioseparations when the drugs, chiral selectors or samples are non-water soluble. Chiral separations have been performed by NACE mainly using alcoholic solvents as BGEs, with problems of current breakdowns and changes in the BGE composition, due to their high volatility. In this work, the suitability of DMSO as BGE in NACE has been evaluated. Different experimental variables affecting the enantioresolution of three drugs have been evaluated, finally achieving complete enantioresolution of two drugs (verapamil, Rs=1.5 and pindolol, Rs=2.0) and partial resolution of the third one (fenfluramine, Rs=1.2). DMSO has been demonstrated to be a good alternative to methanolic BGEs in NACE.
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