Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10562939 | Talanta | 2005 | 6 Pages |
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 Ã 10â7 mol Lâ1 and 1 Ã 10â3 mol Lâ1, and the detection limit was 1 Ã 10â7 mol Lâ1. 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.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Li Tian, Li Liu, Li Chen, Nan Lu, Hongding Xu,