graphite furnace atomic absorption spectrometry with malilrix modification for determination of lead in drinking water

an amoniumvanadate plus sodium molybdate mixed modifier graphite furnace atomic absorption spectrometric method has been developed for determination of traces of lead in drinking water. the concentration of lead in the sample is obtained by direct comparison to linear working graph prepared from aqueous standards in the modifier medium, the results indicate the better performance of the proposed modifier over pd-mg. recovery of lead from spiked samples was 99.4%. the withinrun and within-batch precisions, rsd, were less than 4%. the limit of detection based on three times the standard deviation of the blank was 0.07 µg i . the sensitivity and siihplicity of the method make it attractive for routine determination of lead in environmental samples.