Objective To establish a solid phase extraction(SPE) with atom absorption spectrometry(AAS) for the determination of lead in soy sauce samples.Methods The samples were pretreated by microwave digestion.After the digested solution being adjusted to pH 5.5 by ammonium acetate,the solution was then passed through a DigiSEP-Blue cartridge pretreated by 5 ml of 1 mol/L ammonium acetate for the removal of large amount of salt.The eluate from the DigiSEP-Blue cartridge washed by 8ml of 2 mol/L nitric a...