✍ Scribed by C.E. Plock
No coin nor oath required. For personal study only.
The investigation of the organic complexes of neptunium(V1) has been limited to the acetate1 and malonate' complexes. KELLER AND I<IHZRLE~ attempted to prepare the neptunium(VI)-8-hydrosyquinoline complcs, but the neptunium(V1) was rapidly reduced by the complesing l&and. The complexes of neptunium(V) have been more thoroughly investigated -3 *. Glutamic acid, an n-amino acid, has not, however, been used as a complesing ligand for neptunium. The investigation of the glutamate complexes of the actinide elements has been limited to uraniurn(VI)Q*lo. This report is concerned with the voltammctry of the neptunium(V1) glutamate complex at the rotated glassy carbon electrode. EXPERIMENTAL Ap$aratus All voltammograms were obtained at 25" with a calibrated Sargent Model XV recording polarograph. None of the measurements was damped. The electrolysis cell and the glassy carbon electrode (GCE) have been described2*". The electrode was mounted in a Sargent synchronous rotator that had a rotation speed of Goo rev/min. The electrode was cleaned at the end of each measurement, by allowing the electrode to rotate for 15-30 set in concentrated nitric acid. The pH values of the solutions were measured with a Beckman Model H-2 pH meter and aglasselectrode. The PH was adjusted with perchloric acid or sodium hydroxide. The conductometric titrations were performed with a Model RC-16 (Industrial Instruments, USA) line operated conductivity bridge. Reagents The preparation and standardization of the neptunium(V1) and the neptunium-(V) stock solutions have been described"*ll. The disodium glutamate solution was prepared by dissolving sodium hydrogen glutamate monohydrate (Matheson, Coleman and Bell, USA) in a solution containing sufficient sodium hydroxide to neutralize the sodium hydrogen glutamate and make the final solution 0.1 M in sodium hydroxide. All other chemicals were reagent grade and prepared in the usual manner. Purified nitrogen was used to deaerate the test solutior:s. * Work performed under U.S. Atomic Energy Commission contract AT(zg-x)-I x06.
📜 SIMILAR VOLUMES