Abstract
Availability of lead (Pb) and cadmium (Cd) in farmland soils and its distribution in individual plants of dry‐seeded rice were investigated utilizing graphite furnace atomic absorption spectrometry (GFAAS) with a matrix modification technique. Five extractants were compared, and the operating conditions for GFAAS were optimized. The detection limits were 4.2 ng for Pb with the precision of 1.54% and 0.1 ng for Cd with the precision of 2.38%. The contents of the extractable Pb and Cd in soils were determined with the five extractants, and availability of Pb and Cd in farmland soil was discussed. The contents of Pb and Cd in different parts of dry‐seeded rice were lower than those in dry‐seeded rice soil. The contents of Pb and Cd in rice were lower than in other parts. The end top leaves accumulated the highest amounts of Pb and Cd.
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