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Electrodeposition of actinide traces from aqueous alkaline solutions and tributyl phosphate (1991)

Zantuti, F. ; Al-Medehem, B. ; Silin, V. I. ; [et al.]

Springer

Journal of radioanalytical and nuclear chemistry 147 (1991), S. 51-58

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ISSN: 1588-2780

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering

Notes: Abstract The electrodeposition of uranium and trace quantities of239Pu,234Th,144Ce on a stainless steel disk has been investigated from 0.5–2.0M NaOH and the two-phase system: extract of actinides in TBP-aqueous solution of NaOH. The electrodeposition yield of the above elements reaches 98–100% in 40 min of electrolysis with current density 0.4–0.5 A/cm2. The presence of 0.5M Na2CO3, 2.0M NaNO3, 2.0M NaNO2, 0.2M NaF in alkaline solutions does not decrease the electrodeposition yield. The electrodeposited films meet all the requirements of α-spectrometry. The uranium oxidation states (V) and (IV) have been determined in the electrodeposited films.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02039565

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SERRS of azurin adsorbed on a silver surface (1994)

Silin, V. I. ; Gaigalas, A. K.

Chichester [u.a.] : Wiley-Blackwell

Journal of Raman Spectroscopy 25 (1994), S. 903-906

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ISSN: 0377-0486

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: Surface-enhanced resonance Raman (SERR) spectra of azurin, a copper-containing protein, were measured on a silver surface with a double grating. Significant differences in intensity and band wavenumber were obtained between SERR and solution resonance Raman spectra in the region 250-300 cm-1 and near 400 cm-1. Preliminary interpretation of these differences suggests a likely orientation of the azurin protein on the silver surface in which the N(His44)—N(His115)—S(Met119) plane is perpendicular to the metal surface and the imidazole group of His115 is in close proximity to the metal.

Additional Material: 3 Ill.