New bidentate dithiocarbamate ligand (NaL) namely . To characterize the ligand and its complexes, used different analyses methods such FTIR, UV-Vis, elemental microanalysis, atomic absoreption, magnetic susceptibility, conductance, melting points, 1 H-13 C-NMR spectroscopy, thermal analysis and mass spectrum. These studies indicated the formation of DTC complexes which their geometries about metal centers are octahedral; except Pd-complex is square planer. The bacterial activity evaluation against investigated bacterial species indicated that the metal complexes are more active than the free ligand when compared them.
A new calcium ion-selective electrode was assembled from complex synthesized by calcium ion and zincon which doped in pvc with suitable mediator and solvent . The prepared complex was identified by UV-Visible and IR spectrophotometry. The new electrode was characterized by its high slope (29.55 ±0.02 mV/decade) compared with calcium phosphate electrode (26.67±0.022 mV/decade) and long lifetime (10 months) . The linear range of the electrode was 10-5-10-1M and the detaction limit was 10-5M . Response time was in the range of 20-60 seconds depending on the concentration of the solution and the lifetime of the electrode. The electrode was linearly working at a pH of (5-10).Most of anions were severely interfered and these were exploited to determine calcium and the anions in precipitation titrations . Cations were slightly interfered especially at high interferent concentrations .The new electrode was applied for the determination of calcium in tap water which offered excellent results compared with flame emission photometric method.
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