Direct determination of gallium on polyurethane foam by X-ray fluorescence.
Gallium chloride is easily extracted from 6M HCl by comminuted polyether-type polyurethane foam. After the extraction step, the gallium absorbed by the PU foam can be quantitatively determined by X-ray fluorescence. A procedure for the direct determination of gallium absorbed by PU foam by XRFS is thus described. Gallium is determined at levels as low as 60 ng/ml (C(L)), with a calibration sensitivity of 424 cps ml/mug, within a linear range 0.1-2.30 mug/ml. The procedure investigated was successfully applied to determination of gallium in aluminum alloys, bauxite and industrial residue samples.
Carvalho
M S
MS
Instituto de Engenharia Nuclear, Comissão Nacional de Energia Nuclear, Cidade Universitária, Ilha do Fundão-Rio de Janeiro-Brasil 21945-970.
Medeiros
J A
JA
Nóbrega
A W
AW
Mantovano
J L
JL
Rocha
V P
VP