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Electrocatalytic oxidation of thiosulfate at the 2,7-BFEFMCPE occurs at a potential about 460 mV less positive than that unmodified carbon paste electrode.The diffusion coefficient(=5.6×10~(-5) cm~2 s~(-1)),the kinetic parameters such as electron transfer coefficient,(=0.5) and k_h(=1.21×10~(-3) cm s~(-1)) of thiosulfate oxidation at the surface of,2,7-BFEFMCPE were determined.The electrocatalytic oxidation peak current of thiosulfate showed two linear dynamic ranges(0.0006-0.009 mmol/L and 0.009- 0.900 mmol/L) and a detection limit of 0.00015 mmol/L.This method was also examined as a new electrochemical sensor for the determination of thiosulfate in real sample.
Electrocatalytic oxidation of thiosulfate at the 2,7-BFEFMCPE at a potential of 460 mV less positive than that of unmodified carbon paste electrode. The diffusion coefficient (= 5.6 × 10 -5 cm -2 s -1) , the kinetic parameters such as electron transfer coefficient, (= 0.5) and k_h (= 1.21 × 10 -3 cm s -1)) of thiosulfate oxidation at the surface of, 2,7-BFEFMCPE were determined. The electrocatalytic oxidation peak current of thiosulfate showed two linear dynamic ranges (0.0006-0.009 mmol / L and 0.009-0.900 mmol / L) and a detection limit of 0.00015 mmol / L. This method was also examined as a new electrochemical sensor for the determination of thiosulfate in real sample.