Collect. Czech. Chem. Commun. 1981, 46, 708-716

The atomic absorption spectrometry of molybdenum in the presence of sulphonated aromatic compounds

Josef Komárek, Vít Mahr and Lumír Sommer

Department of Analytical Chemistry, Purkyně University, 611 37 Brno


The effect of sulphonated aromatic compounds on the atomization of molybdenum in acetylene-air and nitrous oxide-acetylene flames was studied. The absorbance signal is increased in the presence of these compounds only in acetylene-nitrous oxide flames and in the presence of potassium or sodium salts. Otherwise, the absorbance is decreased. The probable mechanism of the effect of sulphonated aromatic groups during the atomization of molybdenum is discussed. The determination in the presence of 0.1M 5-sulphosalicylic acid and 9.5 mg ml-1 KCl is without interference and has high sensitivity.