SOCHOR Jiří1, MAJZLÍK Petr1, SALAŠ Petr1, ADAM Vojtěch1, TRNKOVÁ Libuše2,
HUBÁLEK Jaromír3, KIZEK René1
(1Mendelova univerzita v Brně, 2Masarykova univerzita, 3Vysoké učení technické v Brně)
Studium dostupnosti iontů těžkých kovů pomocí různých extrakčních postupů a elektrochemické detekce A study of availability of heavy metal ions by using various exracction procedures and electrochemical detection
Determination of heavy metals (cadmium, lead, zinc and copper) in soil matrixes belongs to essential procedures for environmental
monitoring. In spite of the fact that heavy metals are naturally occurred in the soil, a considerable toxicity of their high
concentrations has been proven. Electrochemical techniques are effective tool to detect very low heavy metal concentrations
in the biological matrixes. However, due to the complexity of the biological sample, a specific extraction step is required
to improve the determination. This work is focused on optimization of the extraction procedure of the heavy metals (Cu, Cd, Pb, Zn)
from the soil matrix. Seven procedures based on extraction by EDTA, CH3COOH, NaNO3, H2O,
KCl and CaCl2 were compared using
electrochemical detection carried out by differential pulse voltammetry.
Key words: heavy metals, soil, extraction methods, differential pulsed voltammetry.