Collect. Czech. Chem. Commun. 1980, 45, 3313-3319

Atomic absorption spectrometry of cobalt in the presence of chelating agents

Josef Komárek, Dalibor Kolčava and Lumír Sommer

Department of Analytical Chemistry, Purkyně University, 611 37 Brno


The effect of chelating agents on the determination of cobalt in various flames, in a graphite cuvette and tantalum boat was studied considering the expected reaction mechanism of the atomization of cobalt and the reagent donor atom. A marked increase in the sensitivity of the determination of cobalt was observed in the presence of 1-(2-pyridylazo)-2-naphthol, pyrrolidinedithiocarboxylate, diethyldithiocarbamate, 8-mercaptoquinoline, 8-hydroxyquinoline and thenoyltrifluoroacetone for atomization from a tantalum boat. The optimum conditions for the determination of cobalt in the presence of 1-(2-pyridylazo)-1-naphthol are given.