Abstract
A fast, sensitive and specific method for the determination of chlorpheniramine in plasma is described. The drug was extracted with diethylether, back extracted in hydrochloric acid and reextracted in diethylether. The extract was evaporated to dryness and reconstituted in isopropyl alcohol. The isopropyl alcoholic solution was gas chromatographed without any derivatization and the detection was carried out using a nitrogen sensitive detector. The mean recovery of chlorpheniramine was found to be 96% and a drug level as low as 0.5 ng/ml can be accurately measured.
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