Direct and simultaneous spectrophotometric determination of Ni (II) and Co (II) using diethanoldithiocarbamate as complexing agent

Abstract

A direct spectrophotometric method for simultaneous determination of Co(II) and Ni(II), with diethanoldithiocarbamate (DEDC) as complexing agent, is proposed using the maximum absorption at 360 and 638 nm (Co(II)/DEDC) and 390 nm (Ni/DEDC). Adjusting the best metal/ligand ratio, supporting eletrolite, pH, and time of analysis, linear analytical curves from 1.0 10 -6 -4.0 10 -4 for Co(II) in the presence of Ni 1.0 10 -6 -1.0 10 -4 mol L -1 were observed. No further treatment or calculation processes have been necessary. Recoveries in different mixing ratios were of 99%. Interference of Fe(III), Cu(II), Zn(II) and Cd(II), and anions as NO 3 -, Cl -, ClO 4 -, citrate and phosphate has been evaluated. The method was applied to natural waters spiked with the cations.

Synthesis, Structural and Antibacterial Study of Some Metal Ion Dithiocarbamate-Azo Complexes

“…The UV-Vis spectrum of [Ni (DTC)2] complex exhibited two d-d transition peaks at 552nm (18116cm -1 ) and 627nm (15949cm -1 ) which were ascribed to the 1 A1g→ 1 B2g and 1 A1g→ 1 A2g transitions. The appearance of two d-d transition peaks in addition to the diamagnetic character of this complex, which was represented by zero value of the magnetic moment will verify the square planar structure of this complex [20]. The electronic spectrum of [Ni(DTC)2PAN] complex revealed three absorptions appeared at 917nm (10905cm -1 ) belongs to the 3 A2g (F) 3 T2g , 608nm…”