J. Borszeki et I. Korodi, SPECTROCHEMICAL DETERMINATION OF TRACE-ELEMENTS IN ALUMINUM PRODUCTS, Canadian journal of applied spectroscopy, 40(5), 1995, pp. 136-142
We had to develop a solution method to perform parallel control measur
ements in order to improve the analytical reliability of the spectrome
ter. In the first step, we studied the possibility of dissolving the s
ample. We concluded that acid mixtures usable for analyzing macroimpur
ities and alloying elements cause considerable loss in such a concentr
ation range when using an open system. For this reason dissolution sha
lt be carried out in a closed system with a high pressure microwave de
compositor. On the basis of preliminary measurements we knew the limit
s of detection in AA and ICP spectrometry. Therefore we analyzed only
alkaline elements directly from the sample solution by the flame photo
metric method We performed the determination of the other elements aft
er preliminary separation and preconcentration. Celluloses may be used
as well as active carriers in separations. From among methods in the
literature we chose the one which made it possible to separate nest of
the elements. We determined II elements using the method with Hyphan
cellulose. We constructed a hydride-cold vapor generator to determine
hydride forming elements (As, Sb, Sn, Pb, Bi) and Hg, measuring even a
Low concentration range on the order of a tenth of a mg/kg. We perfor
med tests by solid sample optical emission spectrometry in parallel wi
th our investigation in solution Our experience gained from parallel t
ests are promising, backing up the applicability of these analytical m
ethods.