Journal of Chemistry

Journal of Chemistry / 2009 / Article

Open Access

Volume 6 |Article ID 173209 | https://doi.org/10.1155/2009/173209

Reyhaneh Rahnama Kozani, Ferydoun Ashrafi, Masuod Khalilnezhad, Mohammad Reza Jamali, "Kinetic-Spectrophotometric Determination of Iodide Based on its Inhibitory Effect on the Decolorization Reaction of Methyl Orange", Journal of Chemistry, vol. 6, Article ID 173209, 7 pages, 2009. https://doi.org/10.1155/2009/173209

Kinetic-Spectrophotometric Determination of Iodide Based on its Inhibitory Effect on the Decolorization Reaction of Methyl Orange

Received28 Jan 2009
Accepted18 Mar 2009

Abstract

A simple, sensitive, rapid and reliable method has been developed for spectrophotometric determination of iodide based on its inhibition effect on the redox reaction between bromate and hydrochloric acid. The decolorization of methyl orange by the reaction products was used to monitor the reaction spectrophotometrically at 525 nm. The variables affecting the rate of the reaction were investigated. Under the optimum conditions, the limit of detection is 1.5 × 10-7 mol L-1 and calibration range is 2.0 × 10-6–1.3 × 10-4 mol L-1 of iodide. The linearity range of the calibration graph is depends on bromate concentration. The relative standard deviation of ten-replication determination of 8.2 × 10-5 mol L-1 iodide was 1.4%. The proposed method was applied to the determination of iodide in natural water samples with satisfactory results.

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


More related articles

 PDF Download Citation Citation
 Order printed copiesOrder
Views363
Downloads578
Citations