The solvent extraction of vanadium by a chloroform solution of α‐benzoin oxime was investigated. The most favorable condition for the extraction has been found in the pH rang of 1.8 to 3.0 in sulfate or chloride buffer solutions, but with better extraction efficiency when sulfate was used. A solution of 2×10−2 M α‐benzoin oxime in chloroform was used, and 1×10−4 to 2×10−2 M vanadium(V) was extracted favorably in about 89% yield by a single extraction, and in about 97% yield by a double extraction. The effects of shaking time, concentration of α‐benzoin oxime, and diverse ions have also been investigated. Vanadium(V) can be readily extracted without interference in the presence of copper(II), aluminum(III), iron(III), silver(I), zirconium(IV), and chromium(III).

The uranyl ion in 5‐sulfosalicylic acid (5‐SSA) solution has been investigated by polarography. The constitution of the chelate species was confirmed by conductometric titration, under the experimental conditions: temperature 25±0.1C. pH = 2.0‐9.0. ligand concentration 10‐200 mM. At pH < 4.8, the chelate species, UO2(HA)22−, is predominant. At pH 6.0. the complex species. UO2(A)24 mainly exists. The chelate species. UO2(HA)22−, and UO2(A)24, co‐exist between pH 4.8‐6.0. The diffusion coefficients and stability constants have been determined by equations derived from Ilkovic equation.

Dithiocarbamate derivatives is a versatile ligand that contain two atoms of sulfur as a strong electron donor. It combines with metals. N-phenylaminedithiocarbamate has synthesized and applied in solvent exctration. Synthesis carried out with addition carbon disulphide to N-phenylamine and concentrated pottasium hydroxyde in metanol. The result was characterized by spectroscopy 1 H-NMR, 13 C-NMR, FTIR, Elemental Analysis, that showed molecular structure was significant. Applied N-Phenylaminedithiocarbamate in solvent extraction showed precent of result Cu(II), Co(II), Cr(III) and Ni (II) were 90.45%-99.99% at pH 4-9.

The polarography characteristic of uranyl ion in chromotropic acid solution was investigated systematically over the pH range 2.0 to 10.0 with ligand concentrations varying from 0.010 M to 0.200 M. At pH 5.5, the one‐electron reversible reduction waves were obtained. The temperature coefficient of the half‐wave potential was obtained to be −0.32 mV per degree and the mean value of id/h1/2 is 0.340 ± 0.003. The electrode reaction is UO2(HA)24− + c = UO2(HA)2− + HA3− Where pH 5.5, an irreversible and diffusion‐controlled wave was obtained. The diffusion coefficients and kinetic parameters of complex species were determined by deducing instantaneous equations.

Micelles formed from gelatin solutions were studied by sedimentation and optical mixing spectroscopy (OMS). We sampled gelatin solutions at various centrifugal speeds. Single exponential autocorrelation functions of the gelatin solutions were measured at 27°C and at 90° scattering angle by OMS. Calculation of the diffusion coefficient D from the measured autocorrelation function of scattered light has been carried out in this studied. A calculation of the micellar radius from the Stokes‐Einstein equation was carried out. We also calculated the sedimentation coefficient and molecular weight of gelatin micelles and found that the polydisperse gelatin micelles were formed at 50mg/mL.