A simple and sensitive method for the determination of iodide and iodate in raw, ultraviolet- and ozone-treated aquacultural seawater samples using ion chromatography coupled to an ultraviolet detector. Issue 28 (5th July 2016)

• Record Type: Journal Article
• Authors: Rodriguez, E. Sanz; Setiawan, A. N.; Pope, S.; Haddad, P. R.; Nesterenko, P. N.; Paull, B.
• Is Part Of: Analytical methods. Volume 8:Issue 28(2016)
• Page Start: 5587
• Page End: 5595
• Publication Date: 2016-07-05
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/c6ay01381c
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : A new and sensitive ion chromatographic method for the speciation of iodine in aquacultural seawater samples has been developed. Abstract : A new ion chromatographic method for the speciation of iodine in aquacultural seawater samples has been developed. This simple, isocratic, non-suppressed ion chromatographic method, which uses an electrolytically generated potassium hydroxide eluent with a high capacity anion exchange column (Dionex IonPac AS20, 250 × 4 mm ID, 7.5 μm), allows the direct injection of undiluted seawater samples, with detection based upon standard ultraviolet absorbance (226 nm). Using a sample injection volume of 125 μL, a method limit of detection for iodide of 9.45 nM in seawater was achieved, with an absolute detection limit of 0.15 ng. Speciation (iodide/iodate) was accomplished via off-line sample reduction using ascorbic acid (0.2 M) and HCl (6 M). The new method was applied to the study of iodine speciation in raw, ultraviolet- and ozone-treated aquacultural seawater samples.