Voltammetric analysis of Cu (II), Cd (II) and Zn (II) complexes and their cyclic voltammetry with several cephalosporin antibiotics

Syntheses, structures and properties of a new compound of the type [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)]2[Zn(SCN)4]·H2O with zinc in two cationic and one anionic complexes

“…2). In the case of free Zn 2+ ions there was only one reduction peak at about −1.4 V related to the reduction of Zn II to Zn 0 [16]. In order to evaluate the origin of the two reduction peaks of 1, the ratio of currents of the metal-centered and ligand-centered peaks were measured as about 1:1 and 1:2 for the first and second Diagram 1.…”

Removal of cephalexin from aqueous solutions by original and Cu(II)/Fe(III) impregnated activated carbons developed from lotus stalks Kinetics and equilibrium studies

“…The dominant species of copper is Cu 2+ below pH 6 [49]. When pH is 2.5 the percent removal of CEX is higher than in the pH range from 2.5 to 6.5, which can be explained in that CEX forms complexes with Cu(II) [50]. For AC-Fe, the maximum adsorption of CEX was obtained at pH 4.5-6.5.…”

Spectrophotometric Determination Studies of Cefotaxime (CFX) and their CFX- Cd (II) and CFX- Cu (II) Complexes

“…The absorbance was measured at 350nm against the reagent blank. A graph is drawn between the volume of CFX and absorbance 26 . The data are shown in Table 8 and Fig 8. The point of the intersections in graph gives the composition of these complexes [27][28] .…”

“…Graph is plotted (Figures 3 & 4) between pH and absorbance values are given in Table.2. The intensity of the color increases with time, but the maximum color develop is possible 13 only after heating the system for half an hour at 50 to 60°C. In explaining the results on CFX-Cd (II) and CFX-Cu (II) complexes 14 -15 , the author has proved that hydrolysis of the drug are not required for complex formation.…”