Potentiometric Phosphate Ion Sensor Based on Electrochemical Modified Tungsten Electrode.

ABSTRACT: Determination of phosphate ions in aqueous solutions attracts a great deal of interest in the areas of environment, medicine, and agriculture. As phosphoric acid is a poly basic acid, the different forms of existence at different pH result in direct determination facing a big challenge. Herein, we reported a potentiometric phosphate ion sensor based on a surface-modified tungsten electrode. Pure tungsten was electrodeposited at a constant potential of 0.2 V versus Ag|AgCl in Na₂HPO₄. WO₃ and H₃O₄₀PW₁₂·xH₂O were electrodeposited on the surface of the tungsten electrode. The modified tungsten electrode was used as a working electrode in a two-electrode system to detect the concentration of phosphate ions in a

SUBMITTER: Xu K 

PROVIDER: S-EPMC8173557 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature