By Alfred J. Moses
Read or Download Analytical Chemistry of the Actinide Elements PDF
Best general & reference books
"Examines all identified business approaches utilizing form selective zeolites. moment variation comprises new, updated info at the particular positive aspects that make zeolites form selective, the function form selective catalysis can play supplying environmentally fresh fuels, 12-membered oxygen ring platforms, mesopore platforms, and extra.
This ebook evaluation sequence offers present traits in smooth biotechnology. the purpose is to hide all points of this interdisciplinary expertise the place wisdom, equipment and services are required from chemistry, biochemistry, microbiology, genetics, chemical engineering and desktop technological know-how. Volumes are prepared topically and supply a finished dialogue of advancements within the respective box during the last 3-5 years.
The electronic global profoundly shapes how we paintings and devour and likewise how we play, socialize, create identities, and interact in politics and civic lifestyles. certainly, we're so enmeshed in electronic networks—from social media to mobile phones—that it truly is challenging to conceive of them from the surface or to visualize another, not to mention defy their likely inescapable strength and common sense.
- Applied biochemistry and bioengineering
- Anelastic Relaxation in Crystalline Solids
- General Chemistry
- Ion Association in Proton Transfer Reactions. Use of ESR for the Quantitative Determination of Gas Phase Atom and Radical Concentrations
- Living Chemistry
Extra info for Analytical Chemistry of the Actinide Elements
HC1, F - cat. 5 min 1min 20 20 20 * Aeration may be necessary to oxidize U +3 to U +4 . 24 — — — SEPARATIONS 25 Because of large differences in extraction coefficients between the actinides, it is not feasible to extract them as a group. A similar situation exists with ion exchange separations. 2 U N I T PROCESSES FOR THE SEPARATION OF ACTINIDES Step Procedure Separation of Extraction hexavalent actinides Precipitation ( 1 ) 0 · 5 Μ Η Ν 0 3 , 2 M Mg(N0 3 ) 2 , ethyl ether ( 2 ) 0 · 1 Μ H N 0 3 , 3 M Ca(N0 3 ) 2 , hexone (3)pH 1-5, 3 M acetylacetone in hexone (1) 1 M C H 3 C 0 2 H , 0-5 M CH 3 C0 2 Na, 5 M N a N 0 3 , U + e carrier Joint separa- Extraction tion of tetraand hexavalent actinides Precipitation (1)8M (2) 1 M (3) pH (4) 2 M (1) pH H N 0 3 , ethyl ether H N 0 3 , 4 M Ca(N0 3 ) 2 , hexone ~ 4, 3 M acetylacetone in chloroform H N 0 3 , tributyl phosphate ~ 1, excess H 2 O a Separation of Extraction tetravalent actinides ( l ) p H 1-0, 1*5M cupferron in chloroform (2)pH 1-0, 0-1 M T T A in benzene (3)pH 2 0 , 2 M acetylacetone in benzene (only U and Pu) Precipitation ( 1 ) 0 · 2 Μ I03~, 3 M H + , Ce + 4 or Zr+ 4 carrier ( 2 ) 0 · 3 Μ H 3 P 0 4 , 3 M H+, Zr+ 4 or Bi+3 carrier (3) m-nitrobenzoic acid, p H ~ 3, T h + 4 carrier Joint separa- Precipitation (1) 1-3 M H F , 1 M H+, La+ 3 carrier tion of tri( 2 ) 0 1 M H 2 C 2 0 4 , I M H+, Ce+4 or Th+ 4 and tetracarrier valent Ion (1) Sorption on cation exchange resin, eluactinides Exchange tion with complexing agent Separation of No satisfactory process for the selective separation of trivalent trivalent actinides actinides 26 THE ACTINIDE ELEMENTS oxidation states of 4, 5 and 6.
REFERENCES 1. Handbook of Chemical Methods for the Determination of Uranium in Minerals and Ores, H . M . Stationery Office, London, 1950. 2. C. J. RODDEN and J. J. TREGONING, Manual of Analytical Methods for the Determination of Uranium and Thorium in their Ores, revised edition, New Brunswick Laboratory, U . S . Government Printing Office, Washington, 1955. 3. F . S. GRIMALDI, I. M A Y , M . H . FLETCHER and J. S. Geo. Surv. Bull. No. 1006, Washington, 1954. 4. W. F . HILLEBRAND and G. E. F .
EMULSION TECHNIQUES Very low levels of alpha activity can be determined by exposure of the separated material to a nuclear track emulsion. This technique is particularly useful in health physics analyses, where urine specimens must be analyzed for rather low levels of plutonium and other elements. Following is an outline of the analytical method, recommended by Schwendiman and Healy13 for the determination of plutonium in urine. Procedure for the determination ofplutonium in urine. Coprecipitate Pu on L a F 3 and dissolve the precipitate.
Analytical Chemistry of the Actinide Elements by Alfred J. Moses