The determination of iodide in sea water by neutron activation analysis

✍ Scribed by George T.F. Wong; Peter G. Brewer

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 546 KB
• Volume: 81
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)89461-1

✦ Synopsis

A simple and sensitive method for the determination of iodide in sea water by neutron activation analysis has been developed. Iodide is separated from most other anions by passing sea water through a strongly basic anion-exchange column, recovered by elution with 2 M sodium nitrate, and concentrated from the eluate by precipitation #as palladium(I1) iodide in the presenceof excess of palladium(I1) with c*lemental palladium as carrier; elemental palladium is generated by reduction of some of the palladium(I1) with thiosolfatc. The precipitate is separated from the supcrnatant liquid by filtration. Checks on the efficiency of separation by means of added "'I showed recoveries of 100 ? 3 %. The filter paper containing the precipitate is pressed into a pellet for neutron activation analysis by irradiation for 5 min at a flux of 4 . 10" n cm ? s ' and counting the 'X I 442.7-keV photopeak.