Abstract:

      We employed automatic digestion instrument to decompose soil sample and prepared determinationpending solution. We also employed graphite furnace atomic absorption spectrometry to determine Pb and Cd content in soil samples. Experimental results show that its correlation coefficient is greater than 0.999 0, and that the relative standard deviation of Pb and Cd is less than 5%. Test results for national standard substances GBW07447, GBW07450 and GBW07452 coincide with reference values. The method is simple, rapid and accurate and applicable to the determination of Pb and Cd in batches of soil samples.

Key words: automatic digestion, graphite furnace atomic absorption spectrometry, Pb, Cd, soil samples