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An application of atomic absorption spectrometry using graphite furnace for the determination of minute amounts of antimony and arsenic has been developed from our method for tin which was reported in a previous paper. For the atomization, nitric acid solution are preferable and they should be free from hydrochloric and sulfuric acid. Interferences induced potentially by aluminum, antimony, chromium, iron, selenium, tellurium, tin and zinc could be prevented by an addition of 2000ppm lanthanum nitrate. Less than 12μg of antimony and arsenic were coprecipitated with 10mg of lanthanum and 1mg of iron from an aqueous ammonia solution in order to separate them from unexpected interfering materials befor the determination. The method is applied to the analysis of antimony and arsenic in copper metals.
