Abstract
A stability-indicating LC method was developed for the simultaneous determination of ibuprofen and diphenhydramine citrate in pharmaceutical dosage forms. The chromatographic separation was achieved on an Inertsil ODS 3V, 150 × 4.6 mm, 5 μm, column. The mobile phase contained a mixture of 50 mM potassium dihydrogen phosphate buffer:acetonitrile:triethylamine:glacial acetic acid (55:45:0.2:0.2, v/v/v/v). This method allowed the determination of 2.85–9.14 mg mL−1 of ibuprofen and 0.54–1.73 mg mL−1 of diphenhydramine citrate, in a diluent consisting of pH 7.2, 50 mM potassium dihydrogen phosphate buffer:acetonitrile (40:60, v/v). The flow rate was 1.2 mL min−1 and the detection wavelength was 260 nm. The limit of detection for ibuprofen and diphenhydramine citrate was 1.72 and 0.54 μg mL−1 and the limit of quantification was 5.73 and 1.64 μg mL−1, respectively. This method was validated for accuracy, precision and linearity. The method was also found to be stability indicating.
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Acknowledgements
The authors wish to thank the management of Dr.Reddy’s Laboratories Ltd for supporting this work. Cooperation from colleagues of Research and Development and Analytical Research and Development of Dr.Reddy’s Laboratories Ltd is appreciated.
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Rao, D.D., Venkat Rao, P., Sait, S.S. et al. Simultaneous Determination of Ibuprofen and Diphenhydramine Citrate in Tablets by Validated LC. Chroma 69, 1133–1136 (2009). https://doi.org/10.1365/s10337-009-0977-3
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DOI: https://doi.org/10.1365/s10337-009-0977-3