Two accurate, precise, sensitive and economical procedures for simultaneous estimation of Cefpodoxime proxetil and Potassium clavulanate in tablet dosage form have been developed. The methods employed were absorbance correction method (I) and first order derivative spectroscopic method (II). The first method employs wavelength 288 nm for direct estimation of Cefpodoxime proxetil where Potassium clavulanate shows nil absorbance. Estimation of Potassium clavulanate is carried out after correction for absorbance of Cefpodoxime proxetil at 218 nm. The second method is based on first order derivative spectroscopy. Wavelengths 235.6 nm and 308.2 nm were selected for the estimation of the Potassium clavulanate and Cefpodoxime proxetil, respectively. Both the drugs obey Beer's law in the concentration range 5-50 microg/ml. The results of analysis have been validated statistically and by recovery studies. The percentage assay was found to be 99.54 +/- 0.285 for Cefpodoxime proxetil and 98.53 +/- 0.760 for Potassium clavulanate (Mean +/- SD) by method I and 99.93 +/- 0.270 for Cefpodoxime proxetil and 99.40 +/- 0.723 for Potassium clavulanate (Mean +/- S.D) by method II respectively.
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