Preconcentration and Atomic Adsorption Spectrometric Determination of Cadmium, Cobalt, Copper, Iron, Lead, Maganese, Nickel and Zinc in water Samples Using 6-Methyl-2-pyridinecarboxaldehyde-4-phenyl-3-thiosemicarbazone

The reagents 6-methyl-2-pyridinecarboxaldehyde-4-phenyl-3-thiosemicarbazone (MPAPT) has been examined for the pre-concentration of metal ions and determinations using air acetylene flame atomic adsorption spectrometer. The method is based on the complexation and extraction of cadmium(II), cobalt(II), zinc(II) in chloroform. The metals ions back extracted in nitric acid (1:1) or after evaporation of solvent the residue is digested in nitric acid. After necessary adjustment of volume the metal ions were determined in aqueous solution. Pre-concentration is obtained 10-25 times. Metal ions recovery was 95.4-100.8% with coefficient of variation 0.2-7.5%. The method was used for the determination of metals in canal and sewerage waters, within 2-6433 mg/I, with CN 0.2-5.2%.

V K DEWANI ,M Y KHUHAWAR ,P DAS ,