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Clinical Chemistry 26: 638-640, 1980;
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Clinical Chemistry, Vol 26, 638-640, Copyright © 1980 by American Association for Clinical Chemistry

Gas-chromatographic determination of disopyramide and its mono-N- dealkylated metabolite in serum with use of a nitrogen-selective detector

JE Bredesen

I describe a rapid, simple routine gas-liquid chromatographic method for simultaneous isothermal quantitation of disopyramide and its mono-N- dealkylated metabolite. The method involves one extraction step with dichloromethane, derivatization of the metabolite, and gas chromatography with an OV-17 liquid phase. Standard curves were linear over the concentration range tested (0.1-25 mg/L) and the maximum coefficient of variation was 9.2%. Quantitation of both disopyramide and its mono-N-dealkylated metabolite with the present method is less time-consuming than are gas-chromatographic methods previously described.




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