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Titolo:
Determination of chemical species of iodine in seawater by radiochemical neutron activation analysis combined with ion-exchange preseparation
Autore:
Hou, XL; Dahlgaard, H; Rietz, B; Jacobsen, U; Nielsen, SP; Aarkrog, A;
Indirizzi:
Riso Natl Lab, DK-4000 Roskilde, Denmark Riso Natl Lab Roskilde Denmark DK-4000 tl Lab, DK-4000 Roskilde, Denmark
Titolo Testata:
ANALYTICAL CHEMISTRY
fascicolo: 14, volume: 71, anno: 1999,
pagine: 2745 - 2750
SICI:
0003-2700(19990715)71:14<2745:DOCSOI>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISSOLVED IODINE; NATURAL-WATERS; ORGANIC IODINE; MARINE WATERS; SPECIATION; SEA; CHROMATOGRAPHY; BROMINE; COLUMN; IODATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Hou, XL Riso Natl Lab, POB 49, DK-4000 Roskilde, Denmark Riso Natl Lab POB49 Roskilde Denmark DK-4000 0 Roskilde, Denmark
Citazione:
X.L. Hou et al., "Determination of chemical species of iodine in seawater by radiochemical neutron activation analysis combined with ion-exchange preseparation", ANALYT CHEM, 71(14), 1999, pp. 2745-2750

Abstract

A method for the determination of iodide, iodate, organic iodine, and total iodine in seawater was developed. The behaviors of loading, washing, and eluting of iodide, iodate, acid organic iodine in a strongly basic anion-exchange column (AG1-x4, chlorine form) were studied by I-131 tracer. Iodide was separated from other iodine species and other ions by directly passing filtered natural seawater through an anion-exchange column, washing with deionized water and 0.5 mol/L KNO3 solution, and eluting with 2.0 mol/L KNO3. Organic iodine was separated by passing seawater through an ion-exchange column after iodate had been converted to iodide by KHSO3 and collecting effluent during loading and washing with deionized water. The iodine content was determined by neutron activation analysis with postirradiation separation using CCl4 extraction. Studies of the effect of chlorine, bromine, and iodine concentrations on the extraction separation show that the recovery of iodine decreases with increasing Br- and Cl- concentrations and decreasing I- concentration. Under the experimental conditions, iodine in seawater wasquantitatively recovered, and a 0.2 mu g/L detection limit for iodine was obtained. Concentrations of total iodine, I-, IO3-, anti organic iodine in seawater collected from Roskilde Fjord, Denmark, were determined.

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Documento generato il 04/12/20 alle ore 19:18:34