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Free disopyramide levels in blood serum, the monitoring of which is especially effective for antiarrhythmic therapy, were determined in situ using a disopyramide-sensitive membrane electrode. Sodium tetrakis[3,5-bis(2-methoxyhexafluoro-2-propyl)phenyl]borate was incorporated as the ion-exchanger and 2-fluoro-2 -nitrodiphenyl ether as the solvent mediator in a poly(vinyl chloride) membrane matrix...
A procainamide-selective electrode was constructed and applied for the determination of procainamide concentration in blood serum. The detection limit was 1.5 μg ml -1 , but determination down to 0.5 μg ml -1 was possible with an appropriate calibration. The results correlated well with those obtained by a fluorescence polarization immunoassay which is widely used for the...
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