Lead in soils and sediments

Xan et al. [124] described a highly selective method for the determination of traces of lead in soils and sediments. It is based on the preconcentration of lead on a microcolumn packed with a macrocycle immobilised on silica gel. 

The mean eoncentrations of lead in soil and sediment samples (Table 1) range between... 

Silva et al. [131] investigated the determination of lead in soil and sediment slurries with ruthenium permanent modifier using LS AAS and HR-CS AAS, and comparing the analytical lines at 217.001 nm and 283.306 nm. It is well known that the former line provides about two-times higher sensitivity, but it is rarely used in conventional LS AAS because of its inferior SNR, its shorter linear working range, and its higher susceptibility... 

---