A simple and rapid Q-Absorbance ratio method has been developed for simultaneous estimation of Metronidazole and Norfloxacin in suspension. Methanol was used as solvent & calibration curve was linear over the concentration range 4-24 µg/ml for MET & 2-14 µg/ml for NOR in Q-absorbance ratio method. For Q absorption ratio method 281.6 nm (λmax of NOR) and at 292 nm (Iso-absorptive point) was selected as analytical wavelength & % recovery for MET & NOR was found to be 98.44-99.93 and 99.27-99.91 respectively.
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