Graphite-furnace atomic absorption spectrometric determination of lead and cadmium in foods after solvent extraction and stripping

Novel Approaches to Bioindication of Heavy Metals in Soils Contaminated by Oil Shale Wastes

“…HClO 4 (70% w/w) were added to the almost dry matter, which was dissolved in 25.0 ml 1.0 mM aqueous solution of HNO 3 . The above described sample preparation is based upon Dabeka method [19] but has been improved to have a more complete decomposition of the worm-sample. Finally, 10 ml of the obtained sample solution (to determine zinc ions only 1.0 ml of sample was diluted with water up to 10 ml) was taken for the electrochemical analysis.…”