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Clinical Chemistry 38: 1847-1852, 1992;
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Clinical Chemistry, Vol 38, 1847-1852, Copyright © 1992 by American Association for Clinical Chemistry

Automated capillary electrophoresis applied to therapeutic drug monitoring

MA Evenson and JE Wiktorowicz
Department of Medicine, University of Wisconsin, Madison 53706.

Chromatographic separations in conjunction with physical chemical detection methods can provide extremely accurate and highly precise measurements of drugs in biological matrices. Immunochemical methods for drug analyses, on the other hand, although usually fully automated, often lack accuracy, may be subject to matrix interference effects, and frequently exhibit nonlinearities that contribute to suboptimal analytical results. Automated capillary electrophoresis (CE) promises the high accuracy and precision of physical methods with no operator intervention once the sample is loaded into the sample cup. A clean-up step is necessary for the analysis of drugs in biological matrices, but that could also be fully automated. Reagent costs per test with CE approach zero, because of the use of extremely small volumes of buffers, standards, and controls. We present data supporting CE as an alternative separation strategy for 28 commonly used therapeutic drugs. These can be resolved in less than 16 min with an optimized micelle- based buffer system.




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Copyright © 1992 by the American Association for Clinical Chemistry.