Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1995-1999  (4)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Determination of impurities in titanium and titanium oxide by radiochemical neutron activation analysis (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 192 (1995), S. 155-162 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A radiochemical neutron activation analysis has been applied to 2N–4N grade titanium metal and its oxide. Twenty two impurities were separated in a group from scandium by a radiochemical separation method using cation exchange resin with HBr and HCl. The contents of the elements were calculated by a single comparator method using two monitors. The analytical results agree well within 10% deviation with those obtained by instrumental method. Eighteen elements, Na, Fe, Co, As, Se, Sr, Mo, Sb, La, Eu, Tb, Yb, Lu, Hf, Ta, W, Th and U, are determined in titanium oxides and 17 elements, Na, Cr, Fe, Co, Se, As, Zr, Mo, Sb, Cs, Ce, Tb, Yb, Hf, Ta, W and Th, in titanium metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037748
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Sample treatment techniques for the determination of environmental radiocarbon in a nuclear power station area (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 533-538 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This report describes the environmental sample treatment techniques for14C measurement with liquid scintillation counter. The groundwater sample of about 80 liters was collected from well and inorganic carbon was removed by acidification and recirculated gas stripping with the extraction efficiency of more than 98%. The biological samples were freeze-dried and combusted to carbon dioxide in high pressure combustion unit with a combustion efficiency of nearly 99%. The14CO2 in the stack effluents was collected by an air bubbler with a collection efficiency of more than 99% for a sampling time of two weeks. Sampling of14C in reduced form also has been done by passing the gases through a tube furnace with Pt/Al and Pd/Al catalyst. Active and passive sampling methods for atmospheric14C measurements were compared in detail, and it could be concluded that the uncertainty associated with passive sampling method was quite acceptable for environmental monitoring. The CO2 trapped in NaOH was precipitated as BaCO3, and subsequently reconverted to CO2 for environmental samples and transferred to Carbo-Sorb ETM for liquid scintillation counting. In case higher precision is the deciding factor, benzene synthesis would be employed with home-made benzene synthesizer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349064
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    An anion exchange technique for separation of Na and K for neutron activation analysis of W-Ti alloy (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 234 (1998), S. 71-75 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A radiochemical neutro activation analysis procedure has been developed for the determination of sodium and potassium at parts per billion levels in high purity tungsten/titanium alloy material. The procedure involves the use of an anion exchange separation for purifying sodium and potassium activities from the alloy’s matrix activities,46Sc and187W. In addition, the use of two sequential sample loadings on the resin column prior to elution of the matrix activities has been investigated. Irradiation of 200 mg of the alloy results in a sample of nearly 1 Ci which must be handled in a remote manipulation cell. After acid dissolution of the sample, the sample solution in 1M HF was loaded onto the column. Elution of the sodium and potassium was accomplished using 40 ml of 1M HF. Similar loading and elution of the second sample was followed by the elution of matrix activities with a solution of 1M HF+6M HCl. Extensive tracer experimentation was employed to establish the possibility of retaining the matrix activities on the column while a second sample solution was processed, thus greatly increasing the throughput in terms of the number of samples analyzed per day. The detection limits of Na and K using the method developed are 4.0 ppb and 200 ppb, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02389750
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Analysis of an ancient bronze statue by external beam pixe (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 192 (1995), S. 147-154 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A quantitative analysis of an ancient Buddha statue was performed by external beam Proton Induced X-ray Emission for the purpose of identifying its originality. It is shown how the PIXE method can be applied for archeological study. The elemental composition of the statue is compared with that of several samples with definite ages. The experiment was performed by extracting 2.4 MeV proton beam through a 2 mm diameter collimator and 7.6 μm kapton foil to the He atmosphere. X-rays were measured by a Si(Li) detector. The analysed elements were Fe, Cu, Ag, Au and Hg for gold coating and Fe, Ni, Cu, Zn, As, Ag, Sn, Au, Pb and Bi for bronze body.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037747
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...