Preoconcentration of nickel-63 in sea water for liwuid scintillation counting

✍ Scribed by Jem-Mau Lo; Bor-Jen Cheng; Chia-Lian Tseng; Jun-Der Lee

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 436 KB
• Volume: 281
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)85202-u

✦ Synopsis

A preconcentration procedure for enriching 63Ni from sea water for measurement by liquid scintillation counting (LSC) was established. 63Ni was first enriched by adsorption on hydrous magnesium oxide. The precipitate was collected and dissolved in concentrated HCI. 63Ni was separated from the HCl solution by extraction with diethyldithiocarbamate in chloroform followed by back-extraction into Au3+ solution. Finally, 63Ni in the Au3+ solution was extracted with dimethyl glyoxime in xylene and the organic phase containing -Ni was withdrawn for LX. The optimum conditions of the above preconcentration procedure were investigated by means of an r-emitter, aNi, instead of 63Ni, which is a weak B-emitter, as a radioactive tracer. The preconcentration procedure was applied in conjunction with LX to the analysis of a 63Ni-containing simulated sea-water sample and was found to be feasible and practical.