DETERMINATION OF PLATINUM IN WINE BY GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY

A method based on graphite furnace atomic absorption spectrometry (GFA AS) was developed for determining platinum in wine, Wine samples were prepared by microwave acid digestion or dry mineralization, The method of standard addition was used for Pt determination in untreated wine samples and mineralized samples, Analyte modifiers and furnace conditi ons were optimized, Effects of cations (Mg2+, Ca2+, K+, Na+, and NH4+) and anions (PO43-, SO42-) were tested separately and in combination, Analytical characteristics of the method were optimized for analyte re covery and signal enhancement, Recoveries ranged from 92.5 to 102%, an d precision reproducibility relative standard deviation varied from 7. 5 to 10%. Red, rose, and white wines from France were analyzed. Platin um levels found in most wines were very low (<10 mu g/L).