Abstract
A graphite rod electrothermal atomizer has been used for the AAS determination of traces of gold in hydrochloric and in hydrobromic acid solutions, and also after extraction into HBr-saturated methyl isobutyl ketone. Photographic film samples were decomposed first by enzyme action then by nitric acid/peroxide oxidation, and the gold was extracted into MIBK. For 10-μl aliquots of solution the 3 s limits of detection were 3 × 10 −10g for aqueous solutions, 7 × 10 −10g for MIBK, and 7 × 10 −9 g/cm 2 for film.
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