Determination of antimony in wine by hydride generation graphite furnace atomic absorption spectrometry

A method was developed for the determination of Sb in wine by electrothermal atomic absorption spectrometry, based on preconcentration by hydride generation with collection directly in the graphite furnace. Thiourea was added for prereduction of Sb(V) to Sb(III). The hydride was directly generated from diluted wine. Palladium was used as modifier in the collection step; the overall efficiency of the hydride/trapping system was found to be 67%. Sb was determined in several samples of red wine; the concentrations found were in the range 0.6 to 5.7 mu g/L Sb. The detection limit of the method was 39 pg Sb, corresponding to 0.13 mu g/L Sb in wine when 0.3 mL wine was analyzed.