HIGH-PRESSURE LIQUID-CHROMATOGRAPHIC DETERMINATION OF HYDROCHLOROTHIAZIDE (HCT) IN PHARMACEUTICAL PREPARATIONS AND HUMAN SERUM AFTER SOLID-PHASE EXTRACTION

A rapid, accurate, and sensitive method hasbeen developed for the quan titative determination of hydrochlorothiazide (HCT), an antihypertensi ve-diuretic agent. A Nucleosil C-18 100x4.6 mn 5 mu m analytical colum n was used with a mixture of CH3CN-1% acetic acid, at a volume ratio 2 0:80. Detection was performed with a variable wavelength UV-visible de tector at 270 mn, resulting in detection limits of 0.2 ng per 20 CLL i njection. For the quantitative determination, hydroflumethazide (HFM) was used as internal standard at a concentration of 4.08 ng/mu L. A re ctilinear relationship was observed up to 20 ng/mu L. Analysis time wa s less than 6 min. Copyright (C) 1998 by Marcel Dekker, Inc.