Electrochemical determination of iodide on a vanadium oxide-polypropylene carbonate coated glassy carbon electrode |
| |
Authors: | Tian Li Liu Li Chen Li Lu Nan Xu Hongding |
| |
Institution: | College of Chemistry, Jilin University, Changchun 130023, PR China |
| |
Abstract: | A vanadium oxide-modified glassy carbon electrode was simply and conveniently fabricated by casting vanadium tri(isoproxide) oxide (VO(OC3H7)3) and poly(propylene carbonate) (PPC) onto the glassy carbon electrode surface. The electrochemical properties of iodide at the VO(OC3H7)3-PPC film-modified glassy carbon electrode were investigated by cyclic voltammetry, and an anodic peak was observed at approximately +0.71 V (vs. SCE). Based on this, a sensitive and convenient electrochemical method was proposed for the determination of iodide. Flow injection amperometry (FIA) exhibited a good linear relationship with the concentration of iodide in the range of 5 × 10−7 mol L−1 and 1 × 10−3 mol L−1, and the detection limit was 1 × 10−7 mol L−1. Quantitative recovery of iodide in synthetic samples has been obtained and the interferences from different cations and anions have been studied. The method has been successfully applied to the determination of iodide in dry edible seaweed. The concentrations of iodide measured by this method are in good agreement with those obtained by spectrophotometric method. |
| |
Keywords: | Vanadium tri(isoproxide) oxide Poly(propylene carbonate) Iodide Flow injection amperometry Electrocatalytic oxidation |
本文献已被 ScienceDirect PubMed 等数据库收录! |