Extractive Spectrophotometric Method for Determination of Aripiprazole Hydrochloride in Bulk and Pharmaceutical Formulations

Four simple and sensitive spectrophotometric methods (A – D) for the assay of Aripiprazole in pure and dosage forms based on the formation of chloroform soluble ion-associates under specified experimental conditions are described. Four acidic dyes, namely, wool fast Blue (WFB BL, method A), orange II (Tpooo, method B), Naphthalene Blue 12 BR (NB-12BR, method C), and Azocarmine (AG, method D) are utilized. The extracts of the ion-associates exhibit absorption maxima at 580, 480, 630 and 540 nm for methods A, B, C and D, respectively. Beer's law and the precision and accuracy of the methods are checked by the UV reference.