One simple and sensitive non extractive colorimetric method has been developed for the quantitative estimation of Olanzapine form Pharmaceutical tablet dosage form. Developed method is based on formation of ion pair colored complex of drug with Bromocresol Green Dye. The formed complex in Methylene Chloride solvent does not require any extraction and showed absorbance maxima at 415.5 nm. Linearity was observed in concentration range of 0-10 µgm/ml of olanzapine. The results of analysis were validated statistically and by recovery studies.
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