Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2011 Vol: 3 Issue: 5

Colorimetric determination of Ziprasidone hydrochloride in pharmaceutical formulations

Abstract

A simple and reproducible visible spectrophotometric method has been developed for the determination of Ziprasidone hydrochloride monohydrate (ZPN) in bulk and in dosage forms. The method is based on the reaction of ZPN with gold (III) chloride in the pH range 4.5 – 5.5 forming pink colour complex solution, showing absorption maxima at 600 nm. The linear plot indicates that Beer’s law is obeyed in the range of 5.0 – 60.0 μg/ml of ziprasidone hydrochloride. The molar absorptivity and Sandell’s sensitivity are 7.48 x 103 mol-1 cm-1 and 0.0604 μg/ cm2 respectively. The standard deviation of the method for ten determinations of 10 μg/ml of ziprasidone hydrochloride is 0.0010. The correlation coefficient (γ) of the experimental data of the calibration plot is 0.9998. The effective range of concentration for accurate determination of ziprasidone hydrochloride as ascertained from Ringbom’s plot and it is 10.0 - 50.0 μg/ml.

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