A high performance liquid chromatographic assay for quantitating amodiaquine (A) in tablets, urine, plasma, bile and saliva is described. The method involved acid extraction of the drug from tablets and chloroform extraction of its base from the biological fluids after alkalinization with ammonia. Quinidine was used as the internal standard. A #x3BC;-Bondapak phenyl column was used for separation together with a mobile phase made of methanol, water and glacial acetic acid (pH 2.3). Good chromatograms with efficient separation of drug and internal standard peaks were observed. Retention times of 5.2 and 7.1 min. were obtained for the drug and the internal standard respectively. Correlation between areas under the curve and drug concentration was high. The mean percentage recovery of A from tablets was 102.03, while from the biological fluids, it ranged from 85.2 to 104.61. Urine and saliva obtained from volunteers and bile obtained from animals administering amodiaquine showed chromatograms similar to those obtained for blank samples spiked with A. Interference from table't excipients of biological fluids was undetectable or negligible. The method was found to be precise and simple.
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