Library

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 254 (1975), S. 238-239 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Mercury in post-mortem samples from three groups of people -workers in the mercury mine at Idrija, Slovenia, inhabitants of the town of Idrija and a control group with no known exposure-has been analysed over the past three years5'6. The study has been extended to include selenium. Although we do ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 58 (1997), S. 814 -821 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ergebnisse für bis zu 12 Spurenelemente in einigen neuen biologischen Proben des NBS, Washington, (Citrus-Laub, frische Rindsleber, Weizenund Reismehl, Milchpulver, Wein) wurden mitgeteilt, die mittels radiochemischer Neutronen-Aktivierungs-Analyse erhalten wurden. Eine Diskussion der Verfahren, der Probleme der Standardisierung sowie der korrekten Verwendung der Standardproben wurde geboten.
    Notes: Summary Results for up to 12 trace elements in some newer biological materials of the NBS Washington (Citrus Leaves, New Bovine Liver, Wheat and Rice Flours, Milk Powder, Stabilized Wine) are reported using radiochemical neutron activation analysis. A discussion of the techniques and problems of standardization and the correct use of standards is included.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 69 (1978), S. 261-270 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Schwermetallspuren in verschiedenen Tabaksorten wurden bisher nur wenig untersucht. Deren Bestimmung ist sowohl für Fragen der Gesundheit der Raucher wie im allgemeinen hinsichtlich der Spurenelementaufnahme durch Pflanzen von Bedeutung. Die Neutronenaktivierungsanalyse ist für die Bestimmung von Schwermetallspuren ihrer hohen Empfindlichkeit wegen sehr geeignet. Die weiten Konzentrationsgrenzen, mit denen zu rechnen ist, lassen nicht-destruktive Analysenverfahren weniger geeignet erscheinen. Daher wurden As, Cd, Cu, Hg, Mn, Sb, Se, U, V und Zn radiochemisch rasch abgetrennt und die Gammaspektren der isolierten Radionuklide mit einem NaJ-Detektor bestimmt. Größere Mengen Eisen und Mangan wurden spektrophotometrisch bestimmt. Die Genauigkeit der Ergebnisse, die ihrerseits den Durchschnittswert von wenigstens zwei Messungen bei ungefähr 10 jugoslawischen Tabaksorten darstellen, wurde durch Vergleich mit verschiedenen Standardproben geprüft. Dabei wurde gute Übereinstimmung mit gesicherten Werten bzw. Literaturangaben erzielt. Die Resultate wurden mit Analysenwerten von Kentucky-IR-1-Tabak verglichen.
    Notes: Summary Levels of trace heavy metals in various kinds of tobacco are poorly studied, so their determination in this matrix is important both from the point of view of health studies connected with smoking and more general aspects of the uptake of trace elements by plants. Because of its great sensitivity, neutron-activation analysis is very suitable for determination of trace heavy metals. The great range of concentrations to be expected makes non-destructive analysis less suitable. Thus As, Cd, Cu, Hg, Mn, Sb, Se, U, V and Zn were determined by means of rapid radiochemical separations and measurement of theγ-ray spectra of the isolated radionuclides with an NaI detector. Iron, and manganese at higher levels, was determined spectrophotometrically. The accuracy of the results, which represent the mean value of at least two measurements for about 10 varieties of Yugoslav tobacco, was checked by the analysis of various standard reference materials and good agreement were obtained with certified or literature values. The results were compared with analyses of Kentucky IR-1 tobacco.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 75 (1981), S. 323-329 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine Neutronen-Aktivierungsmethode zur Bestimmung von Nano-grammengen Palladium in biologischen Proben wurde beschrieben. Sie beruht auf der radiochemischen Trennung des109Pd durch Extraktion seines Dimethylglyoxim-Komplexes mit Chloroform aus der sauren, durch nasse Veraschung gewonnenen Lösung der bestrahlten Probe. Der Einfluß der Acidität der wäßrigen Phase auf den Extraktionskoeffizienten wurde ebenfalls durch Radiotracer-Versuche geprüft. Untersuchungsergebnisse für biologische Standardproben und einige Milieuproben wurden mitgeteilt.
    Notes: Summary A neutron-activation method for determination of nanogram levels of palladium in biological samples is described. It is based on radiochemical separation of 13.5-hr109Pd by solvent extraction of its dimethylglyoximate complex into chloroform from the acid solution obtained by wet ashing of the irradiated sample. The effect of the acidity of the aqueous phase on the extraction coefficient was also investigated by radiotracer experiments. Results are reported for biological standard reference materials and a few environmental samples.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 340 (1991), S. 48-52 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A radiochemical neutron activation technique for nanogram and subnanogram levels of vanadium in biological samples was developed, based on dry ashing of the sample prior to irradiation, but without any chemical treatment. It was compared to and validated by parallel analyses of low-level reference materials and human blood using a previously developed totally post-irradiation technique based on rapid wet ashing of the irradiated sample. The irradiated ash was also wet ashed after neutron bombardment to ensure complete dissolution, equilibration with carrier and removal of 38Cl. Results for reference materials, including Versieck's Second Generation Human Serum Reference Material and IAEA Animal Blood, were in excellent agreement by the two techniques, and with reference to literature values. Both methods give exceptionally good radiochemical decontamination of 52V from other nuclides and have nearly quantitative yields. The dry ash mode is slightly quicker and easier to manipulate.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 91 (1985), S. 315-322 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The iodinated resin technique for separation of128I directly from neutron irradiated biological fluids is attractive due to its rapidity, simplicity and high degree of radiochemical purity; however, some doubts exist about the yields of iodine which can be recovered, particularly from organically bound iodine. In the present study, chemical yields on the resin column were studied for irradiated urine, serum and milk by standard additions of iodide and thyroxine. It was found that yields are not quantitative but lie in the range 80–95%, depending on the matrix, with a variability of up to 6% standard deviation. In addition it was shown that no significant adsorption of iodine occurs on polythene ampoules from irradiated biological fluids of natural pH. Some comparative experiments between the resin technique and the oxygen flask ignition method on fluids before or after drying, respectively, showed satisfactory agreement. It is concluded that the iodinated resin technique is suitable for routine analyses or large scale screening programs.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 93 (1985), S. 245-251 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In radiochemical neutron activation analysis, standards may be measured directly or subjected to the same radiochemical processing as the sample. Some considerations in regard to processing are examined, and the advantages and disadvantages of this approach discussed. It is concluded that processing of standards is often inadvisable and can lead to errors, particularly if used as a substitute for radiochemical yield determinations.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 108 (1987), S. 375-375 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 128 (1988), S. 93-102 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A radiochemical procedure for simultaneous determination of the trace elements As, Mo, Sb and Se after thermal neutron irradiation, based on destruction of the sample with saturated Mg/NO3/2 or oxygen combustion, followed by solvent extraction of each element from a common aliquot in 6M hydrochloric acid is deterials was analyzed and good agreement with certified values was obtained.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...