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Matrix-elimination ion chromatography with post-column reaction detection for the determination of iodide in saline waters

Citation

Brandao, ACM and Buchberger, WW and Butler, ECV and Fagan, PA and Haddad, PR, Matrix-elimination ion chromatography with post-column reaction detection for the determination of iodide in saline waters, Journal of Chromatography A, 706, (1-2) pp. 271-275. ISSN 0021-9673 (1995) [Refereed Article]


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DOI: doi:10.1016/0021-9673(94)01207-U

Abstract

An ion chromatographic method has been developed for the determination of traces of iodide in saline waters. A Dionex IonPac AS11 anion-exchange column was used with a mobile phase containing sodium chloride in order to remove interferences of the sample matrix in both the chromatographic separation and detection. This matrix-elimination procedure was reinforced by a post-column reaction detection that was both selective and sensitive for iodide and was based on the reaction of iodide with 4,4′-bis(dimethylamino)diphenylmethane in the presence of N-chlorosuccinimide. Detection was carried out at 605 nm. The detection limit for iodide in seawater is at about 0.8 ppb for a 150-μl injection, and the relative standard deviation at 5 ppb is better than 4%. Bromide is a potential interference, but is well separated from iodide. No interferences from dissolved organic matter in natural samples have been observed.

Item Details

Item Type:Refereed Article
Keywords:iodine, iodate, saline water, seawater, salinity
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Analytical Chemistry not elsewhere classified
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Environment not elsewhere classified
Author:Brandao, ACM (Ms Ana Brandao)
Author:Fagan, PA (Mr Peter Fagan)
Author:Haddad, PR (Professor Paul Haddad)
ID Code:3645
Year Published:1995
Web of Science® Times Cited:35
Deposited By:IASOS
Deposited On:1995-08-01
Last Modified:2013-01-17
Downloads:0

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