Multicomponent analysis using overlapped spectra presents a great challenge in pharmaceutical quality control analysis. The present study was aimed to develop a simple and accurate UV spectrophotometric method for the determination of diclofenac sodium in the presence of lidocaine hydrochloride in an injectable dosage form. The proposed method is based on the simultaneous analysis of diclofenac sodium and lidocaine hydrochloride using two wavelengths (276 nm and 235 nm). Method validation was conducted in accordance with the ICH guidelines. The Beer-Lambert law was obeyed in a concentration range of 6 – 24 and 1.6 – 6.4 μg/mL for diclofenac sodium and lidocaine hydrochloride, respectively, with correlation coefficient not less than 0.996. It proved to be a precise method (RSD% < 3%, n = 6) with good recovery results, which reflects the freedom of interference with lidocaine and other excipients. Thus, the developed method has proved to be accurate and valid for the simultaneous analysis of diclofenac sodium and lidocaine hydrochloride.
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The authors are thankful for the local factories for providing the reference standards of the drugs under study.
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Mukkawi, R., Shantier, S. & Gadkariem, E.A. Spectrophotometric Method for the Simultaneous Analysis of Diclofenac Sodium and Lidocaine Hydrochloride in Bulk and Dosage Forms. Pharm Chem J 55, 831–834 (2021). https://doi.org/10.1007/s11094-021-02503-z
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DOI: https://doi.org/10.1007/s11094-021-02503-z