All the chemicals used were of analysis grade without further purification. 3,3′,5,5′-Tetramethylbenzidine (TMB) was obtained from Tokyo Chemical Industry Co., Ltd. (Tokyo, Japan). glucose oxidase (GOx) was obtained from Aladdin Reagent Co., Ltd. (Shanghai, China). V2O5, oxalic acid, methanol, glucose, hydrogen peroxide (H2O2, 30%), etc., were purchased from Beijing Chemical Works (Beijing, China). The water used in the experiments was purified.
Oxalic acid
Manufactured by Beijing Chemical Works
Sourced in China
Oxalic acid is a dicarboxylic acid commonly used in chemical laboratories. It is a crystalline solid with the chemical formula C2H2O4. Oxalic acid is a versatile compound with various applications in analytical and synthetic chemistry.
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Lab products found in correlation
2 protocols using oxalic acid
1
TMB-based Glucose Oxidase Assay
2
Fabrication of Pine-Shaped Pt Electrode
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First, we polished the Ti substrate (1.5 cm by 1.5 cm by 0.5 mm) with sandpaper and sonicated it twice in ethanol to remove silicon particles. Next, the polished Ti substrate was etched in 10 wt % oxalic acid (Beijing Chemical Works) at ~90°C for 1 hour and then rinsed by ample deionized water. The SAL/flat Ti substrate was prepared by following the fabrication process of the SAL/flat Pt electrode. Then, the pine-shaped Pt was electrodeposited on the SAL/flat Ti substrate with a deposition potential of −0.264 V versus Ag/AgCl. H2PtCl6 (3 mM) solution with KNO3 (100 mM) was used as electrolyte in the electrodeposition process. The working electrode was the SAL/flat Ti substrate, while the Pt plate was used as the counter electrode (fig. S18). Pt mass loading is ~4.5 mg cm−2 on the Ti-based SAL/SAB Pt electrode.
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