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Rapid Neutron Activation Analysis of Arsenic in A Wide Range of Samples by Solvent Extraction of the Iodide

A. R. Byrne ; Department of Nuclear Chemistry, »J . Stefan« Institute, University of Ljubljana, 61000 Ljubljana, Slovenia, Yugoslavia
A . Vakselj ; Department of Nuclear Chemistry, »J . Stefan« Institute, University of Ljubljana, 61000 Ljubljana, Slovenia, Yugoslavia


Puni tekst: engleski pdf 10.168 Kb

str. 225-235

preuzimanja: 104

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Sažetak

A method is described for neutron activation analysis of
arsenic in biological samples, inorganic matrices, water samples,
metals and glass, based on the quantitative and selective solvent
extraction of arsenic iodide into toluene. Depending on the sample,
extraction is carried out from sulphuric, perchloric or hydrochloric
acids containing alkali iodide. After washing the organic phase,
arsenic may be either measured directly or stripped back into an
aqueous medium. The 0.56 MeV y-ray of 76As is counted in a well-
type 3 x 3 inch NaI(Tl) crystal and multichannel analyser. For
moderate neutron doses (20 h at 2 X 1012 cm--2 s-1), levels down
to 0.1 :ng/g may be measured. Results are presented for various
samples inc1uding some international standard materials.

Ključne riječi

Hrčak ID:

196819

URI

https://hrcak.srce.hr/196819

Posjeta: 233 *