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  • Title: [Plasma determination of 7 common drugs by high performance liquid chromatography].
    Author: Richard L, Leducq B, Baty C, Jambou J.
    Journal: Ann Biol Clin (Paris); 1989; 47(2):79-84. PubMed ID: 2500042.
    Abstract:
    A high performance liquid-chromatographic procedure is reported for measuring the plasma concentration of 5 anticonvulsants: phenobarbital, phenytoin, carbamazepine, ethosuximide, valproic acid and 2 bronchodilators: theophylline and caffeine. Limits of detection of ethosuximide and valproic acid are 28 mumol/l, 5 mumol/l for the other drugs. Linearity limits are always very upper than the higher therapeutic dose concentration, the inter assay relative standard deviation are less than 8 p. cent for the 7 drugs at the 3 levels of concentration and the analytical recoveries ranged from 93 to 104 p. cent. The technique is simple and rapid: 4 anticonvulsants are simultaneously extracted and dosed, valproic acid, only has to be dosed lonely. Finally, comparatively to the other immunoassay technique, this method is cheaper.
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