Behaviour of cadmium, cobalt and lead in chlorine-containing organic solvents in electrothermal atomic absorption spectrometry

Abstract

The behaviour of Cd, Co and Pb in chlorine-containing organic solvents (1,2-dichloroethane, chloroform and carbon tetrachloride) in electrothermal atomic absorption spectrometry was investigated. The influence of the chlorine content in the solvent, the chemical form of the analyte, the atomizer type and the chemical form of palladium used as a chemical modifier was evaluated. Loss-free atomization, levelling of the absorbance signals for various solvents and lowering of the non-specific light absorbance were established using tungsten-impregnated tubes as atomizers.