Determination of benorilate in pharmaceutical formulations and its metabolite in urine at carbon paste electrode modified by silver nanoparticles |
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Authors: | Wang Cheng Yin Hu Xiao Ya |
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Institution: | Department of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting lu, Yangzhou 225002, China |
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Abstract: | Benorilate was determined by the differential pulse voltammetry (DPV) using a carbon paste electrode modified by silver nanoparticles in 1.25 × 10−3 mol l−1 KH2PO4 and Na2HPO4 buffer solution (pH = 6.88, 25 °C) .The anodic peak potential was +0.970 V (versus SCE). A good linear relationship was realized between the anodic peak currents and benorilate concentrations in the range of 1.0 × 10−7 to 2.5 × 10−4 mol l−1 with the detection limit of 1.0 × 10−8 mol l−1. The recovery was 95.2-103.6% with the relative standard deviation of 3.6% (n = 9). The pharmaceutical preparations, benorilate tablets samples and its metabolite (salicylic acid) in urine were determined with the desirable results. |
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Keywords: | Benorilate Carbon paste electrode Differential pulse voltammetry Silver nanoparticles Salicylic acid |
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