Optimization of Simultaneous Detection Method for Heavy Metal Elements Content of Pb,Cd,Cr,Hg and As in Soil.

Microwave digestion method was used to digest the soil at one time. Atomic absorption method and atomic fluorescence method were used to simultaneously detect five heavy metal elements content in soil, including Pb,Cd,Cr,Hg and As. The acid system for digestion was optimized for volatile element Hg and refractory element Pb and Cr,and the instrument detection method was optimized for the problem of the narrow linear range of atomic absorption. The determination results show that the measured values are within the uncertainty range of the reference materials,and the relative deviations are all less than 8%. [ABSTRACT FROM AUTHOR]