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  • Articles: DFG German National Licenses  (10)
  • Electronic Resource  (10)
  • 1995-1999  (4)
  • 1965-1969  (6)
Source
  • Articles: DFG German National Licenses  (10)
Material
  • Electronic Resource  (10)
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Extraction of certain elements from hydrobromic and perchloric acid (1968)
    Springer
    Microchimica acta 56 (1968), S. 981-987 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Die Extraktion von Pa, Fe, Hg, Ag, Zn, Co und Se aus Bromwasserstoffund Perchlorsäurelösungen mit Trilaurylamin oder Tributylphosphat wurde in Abhängigkeit von der Säurekonzentration in der wäßrigen Phase und der Lösungsmittelkonzentration in der organischen Phase untersucht. Der Extraktionsvorgang wurde an Hand der Ergebnisse diskutiert. Ebenso wurden die besten Bedingungen für die Trennung der genannten Metallionen ermittelt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01221167
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Extraction of radiogold and radiomereury and some other radioisotopes with mesityl oxide (1968)
    Springer
    Microchimica acta 56 (1968), S. 988-991 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Extraktion vieler Elemente aus salpetersaurem, salzsaurem und schwefelsaurem Medium mit Mesityloxid wurde untersucht. Am besten lassen sich Gold und Quecksilber extrahieren. Optimale Bedingungen für die Trennung dieser beiden von den meisten anderen Elementen wurden festgestellt.
    Notes: Summary The extraction of many elements with mesityl oxide has been studied from nitric, hydrochloric, and sulphuric acid media. Highest extraction from the three acidic media was obtained for gold and mercury. Optimum conditions for the separation of these two elements from most other elements were determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01221168
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Standard addition for yield determination in radiochemical separation by solvent extraction (1968)
    Springer
    Microchimica acta 56 (1968), S. 368-370 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein Verfahren zur Bestimmung der Ausbeute bei der radiochemischen Trennung durch Lösungsmittelextraktion wird beschrieben.
    Notes: Summary A procedure is described for the determination of yields in radiochemical separation by solvent extraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01223572
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Solvent extraction production of high specific activity59Fe and carrier free54Mn from irradiated iron targets (1969)
    Springer
    Microchimica acta 57 (1969), S. 280-285 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Drei verschiedene Verfahren zur Herstellung von59Fe und54Mn aus bestrahlten Eisentargets mit Tridodecylamin, Tributylphosphat und Isobutylmethylketon wurden beschrieben. Sie sind einfacher und wirtschaftlicher als die bisherigen. Die Ausbeute war stets höher als 90%. Die erhaltenen Isotopen sind radiochemisch sehr rein.
    Notes: Summary Three different procedures have been worked up for the production of59Fe and54Mn from irradiated iron targets using tridodecylamine, tributylphosphate, and isobutylmethyl ketone. These procedures are more simple and economic than those previously reported. The yield as estimated by the standard addition technique was found to be always higher than 90%. The separated isotopes were found to be radiochemically very pure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01224091
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Studies on sorption of antimony and europium from liquid organic and aqueous radioactive wastes on different sorbents (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 221 (1997), S. 153-159 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Sorption of124Sb(III) from benzene, toluene, o-xylene and nitrobenzene on treated fly ash, pyrolysis residue and bentonite clay was studied at room temperature using the batch method. In comparison to a former study for the sorption of124Sb(V), the results revealed relatively higher sorption of the trivalent state than the pentavalent one. According to the type of the nonpolar solvent used, the order of uptake of the radioactive isotopes was often o-xylene≥toluene〉benzene. The sorption tendency of the sorbents used towards the radionuclides was: bentonite≥pyrolysis residue〉treated fly ash. Sorption from an aqueous medium on the same sorbents has also been investigated for124Sb(III) compared to124Sb(V),152Eu(III) and their mixtures. The obtained results showed that the order of uptake of the different radionuclides was: Eu(III)〉〉Sb(III)〉Sb(V)〉mixture. The investigation was extended to the desorption studies of these radionuclides in the acidic and the neutral media from the dried radioactivity loaded sorbents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035258
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Extraction and separation of zinc and cadmium chlorides by TOPO from mixed media (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 227 (1998), S. 143-146 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effect of water-miscible alcohols and acetone on the extraction and separation of Cd and Zn chlorides by TOPO was systematically investigated. The maximum extraction of Zn chloride with 0.1 M TOPO decreases in the order: acetone〉methanol〉ethanol〉2-propanol〉2-butanol. For alcohols, the sequence of decreasing extractability is thus parallel to the order of their dielectric constants. This can be explained by the increase of HCl extraction by TOPO in the same direction. The presence of additives in the polar phase prevents the formation of a bulky white precipitate encountered during extraction of ZnCl2 from pure aqueous solutions. A decrease of Cd chloride extraction was generally noticed in presence of additives; this is more noticeable for the longer chain alcohols. The highest separation factor (E for ZnCl2 and CdCl2 in 0.48M HCl is obtained from 30% methanol (13.8 compared to about 3.8 in absence of methanol) and from 10–20% acetone where it reaches 30.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02386447
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Adsorption of Sb(V) from radioactive organic waste solutions on different adsorbents (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 214 (1996), S. 41-50 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The adsorption of radioantimony (122Sb and124Sb) on pyrolysis residue, bentonite and fly ash from its solutions in benzene, toluene and xylene was investigated. The radioactivity of the isotopes was measured in the organic solution above the adsorbents as a function of time. After 24 h, the sequence of uptake of Sb(V) in benzene and toluene is: pyrolysis residue〉bentonite〉fly ash, while in xylene it is bentonite〉pyrolysis residue〉fly ash. The maximum lg kD value was 3.37 for the toluene-pyrolysis residue system. Desorption of Sb(V) from the loaded material was studied using both tap water and 1M HCl. The latter has more desorption power, evidently, due to hydrolysis and production of insoluble species in the neutral medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02165057
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Adsorption of radioisotopes from their organic solutions on filter papers the Sb(III)-nonpolar solvents-system (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 209 (1996), S. 135-145 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The extraction of Sb(III) chloride by nonpolar solvents from 0.15M HCl was studied as a function of sulphuric acid concentrations in the aqueous phase. The distribution of Sb(III) chloride between the nonpolar solvents benzene, toluene, xylene, nitrobenzene, cyclohexane, chloroform and carbon tetrachloride and filter paper is reported. In case of benzene the Sb(III) activity (given in counts·s−1·ml−1) decreases from ∼1500 to ∼200 after 24 hours. The corresponding values are about 1200 and 540 for toluene, 1330 and 50 for xylene, 1050 and 700 for nitrobezene, 1080 and 22 for cyclohexane, 330 and 30 for chloroform and 130 and 40 for carbon tetrachloride. More than 95% of the adsorbed Sb(III) is desorbed by 1M HNO3, 1M HCl or 0.5M H2SO4 by contacting the loaded filter paper with any of these acids for 27 hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02063538
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Extraction of thorium and cerium (III) chlorides by neutral organophosphorus solvents (1968)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 238 (1968), S. 267-273 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Extraktion von Thorium- und Cer(III)-chloriden mit Hilfe von Tri-n-butylphosphat und Di-isoamylmethyl-phosphonat wurde in Abhängigkeit von der HCl-Konzentration in der wäßrigen und der Lösungsmittelkonzentration in der organischen Phase untersucht. Die Stabilität der gebildeten Metallkomplexe wurde bestimmt. Zur Abtrennung von Thorium und Seltenen Erden aus salzsaurem Medium wird Di-isoamylmethyl-phosphonat empfohlen.
    Notes: Summary The extraction of thorium and trivalent cerium chlorides by tri-n-butyl phosphate and di-isoamylmethyl phosphonate has been investigated as a function of hydrochloric acid molarity in the aqueous phase and solvent concentration in the organic phase. The comparative stability of the extractable metal complexes with the two solvents has been also estimated. The second solvent has been recommended, instead of the first, for the separation of thorium and the rare earth elements from hydrochloric acid media.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00499726
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  • 10
    Electronic Resource
    Electronic Resource
    Extraction of Cerium from Nitric Acid Solutions with tertiary amines (1965)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 336 (1965), S. 306-312 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wurde das System R3N—HNO3—Ce(NO3)3 unter Verwendung von radioaktivem 141Ce untersucht. Die Ce-Extraktion aus wäßriger HNO3-Lösung durch Tri-n-dodecylamin Kerosin-Mischungen wurde in Abhängigkeit von der HNO3- und Aminkonzentration ermittelt sowie der durch zugesetzte Nitrate hervorgerufenen Aussalzeffekt studiert. Dabei wurde auch der Einfluß von U(VI) untersucht. Die Aminextraktion und ihr Mechanismus werden im Vergleich mit den bei phosphor organischen Verbindungen und festen Anionenaustauscherharzen vorliegenden Verteilungsverhältnissen diskutiert.
    Notes: The system R3N—HNO3—Ce(NO3)3 was investigated. The partition of cerium(III) between nitric acid solutions and solutions of tri-n-dodecylamine (TDA) in odourless kerosene has been studied by varying the nitric acid, amine and salting-out agents concentrations. The obtained data are compared with those for neutral phosphorus organic compounds as well as for solid anion exchange resins. The mechanism of cerium extraction is discussed in the light of these results. Cerium extraction in the presence of uranium was also investigated.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19653360511
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    Paper (German National Licenses)
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