Sorption-atomic-absorption determination of cadmium and lead in soil.

摘要

A highly sensitive rapid flow sorption-atomic-absorption technique was developed for the determination of cadmium and lead in neutral and acid soil extractions as well as in the solutions obtained after the autoclave decomposition of soil samples. The analytical procedure is automated and includes the preconcentration of metals on microcolumns packed with DETATA sorbent, the direct desorption of metals into the spectrometer atomizer, and the recording of the analytical signal. The detection limitsof cadmium and lead are 0.1 and 5.0mug/litre, respectively, after the preconcentration of solutions for 60 s and the atomization in the propane-butane-air flame.