摘要利用自吸效应背景校正，以磷酸氢二铵为基体改进剂，石墨炉原子吸收法测定土壤和底泥中的铅、镉。

• The contents of Pb and Cd in soils and base-muds are determined by graphite furnace atomic absorption spectrometry with self-absorption background correction and (NH4)2HP04 as matrix modifier.