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- W2174503136 abstract "A bare glassy carbon electrode (GCE) was reformed by carboxylated graphene oxide/lanthanum, and the modified electrode, called GO-COOLa/GCE, was fabricated for simultaneously detecting dopamine (DA), uric acid (UA) and nitrite (NO2−) by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and amperometry. Several factors which affected the electrocatalytic activity of the GO-COOLa/GCE electrode, such as the effect of pH, scan rate and concentration were studied. Due to the combination of carboxylated graphene oxide and lanthanum ions, the GO-COOLa/GCE sensor showed rapid response, excellent selectivity and high catalytic performance toward the electrooxidation of DA, UA and NO2−. In optimized conditions, two linear response ranges for determining DA were obtained over ranges of 0.01-1.96×102 μM and 1.96×102-1.23×103 μM with detection limit of 0.018 μM (S/N = 3). And the responses of the GO-COOLa/GCE electrode for UA and NO2− were linear in the region of 1-1.53×103 μM and 1-2.75×103 μM with detection limits of 0.058 μM and 0.070 μM, respectively. Furthermore, this reformed electrode was successfully used to the detection of DA, UA and NO2− in real urine and serum samples, showing its promising application in the electroanalysis of real samples." @default.
- W2174503136 created "2016-06-24" @default.
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- W2174503136 date "2015-11-01" @default.
- W2174503136 modified "2023-10-01" @default.
- W2174503136 title "Simultaneous determination of dopamine, uric acid and nitrite using carboxylated graphene oxide/lanthanum modified electrode" @default.
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- W2174503136 doi "https://doi.org/10.1016/j.electacta.2015.10.001" @default.
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