Solvent extraction of cadmium, cobalt, copper, iron, manganese, nickel and zinc into isobutyl methyl ketone with 2-(2-benzoxazolyl)malonaldehyde and 2-(2-benzoxazolyl)cyanoacetaldehyde. Extraction-atomic absorption spectrometric determination of trace amounts of the metals in molybdates

Abstract

The distribution of 2-(2-benzoxazolyl)malonaldehyde and 2-(2-benzoxazolyl)cyanoacetaldehyde (2-BOCA) and their complexes with Cd, Co, Cu, Fe, Mn, Ni and Zn in the water-isobutyl methyl ketone (IBMK) system was investigated. The dissociation and distribution constants of the ligands studied and also the composition of the extracted species and their conditional extraction constants were evaluated. The extraction system 2-BOCA-IBMK was applied to the determination of Cd, Co, Cu, Fe, Mn, Ni and Zn in high-purity ammonium and sodium molybdate.