Determination of impurities in high-purity gold, with a gas-stabilized low-temperature arc.
A gas-stabilized arc with aerosol supply has been used for emission spectrometric determination of Al, B, Be, Co, Cr, Fe, Ga, In, Mg, Mn, Ni, Pd, Rh and Zn, as impurities in high-purity gold. Two analytical procedures were compared: (a) direct aspiration of dissolved samples containing 2% of gold and 0.25M KCl as buffer, and (b) separation of impurities by ether extraction of gold from 1M HCl followed by impurity determination with a stabilized arc. Limits of detection, precision and recovery of the extraction procedure are given.
Zmbova
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B
Boris Kidric Institute, Vinca, 11001 Beograd, Yugoslavia.
Marinković
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M