ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • Extraktion mit APDC-MIBK  (1)
  • PACS61.80.Ba; 52.75. $-$d; 81.60.Bn; 76.80  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 61 (1995), S. 1-5 
    ISSN: 1432-0630
    Keywords: PACS61.80.Ba; 52.75. $-$d; 81.60.Bn; 76.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Armco iron samples were surface nitrided by irradiating them with pulses of an excimer laser in a nitrogen atmosphere. The resulting nitrogen depth profiles measured by Resonant Nuclear Reaction Analysis (RNRA) and the phase formation determined by Conversion Electron Mössbauer Spectroscopy (CEMS) were investigated as functions of energy density and the number of pulses. The nitrogen content of the samples was found to be independent of the number of pulses in a layer of 50 nm from the surface and to increase in depths exceeding 150 nm. The phase composition did not change with the number of pulses. The nitrogen content can be related to an enhanced nitrogen solubility based on high temperatures and high pressures due to the laser-induced plasma above the sample. With increasing pulse energy density, the phase composition changes towards phases with higher nitrogen contents. Nitrogen diffusion seems to be the limiting factor for the nitriding process.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 297 (1979), S. 381-383 
    ISSN: 1618-2650
    Keywords: Best. von Chrom(III), Chrom(VI) in Was-ser ; Spektralphotometrie, Atomabsorption ; Extraktion mit APDC-MIBK
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary With the well-known APDC-MIBK extraction of dissolved trace metals from aqueous solutions for AAS analysis only Cr6+ is determined, whereas practically no Cr3+ is extracted. This technique was therefore modified (PHP-buffer; pH 4.7–5.5; 80° C; 20 min reaction time) so that hexavalent and trivalent chromium can be extracted simultaneously into the organic phase, thus allowing determination of the percentage of each of these ionic species in water (hexavalent chromium being determined separately). A procedure for the modified extraction is described.
    Notes: Zusammenfassung Mit der bekannten APDC-MIBK-Extraktion gelöster Spurenmetalle aus wäßrigen Lösungen für die AAS-Analyse wird nur Cr6+ erfaßt, während Cr3+ praktisch nicht extrahiert wird. Die bisherige Methode wurde deshalb so modifiziert (PHP-Puffer; pH 4,7–5,5; 80° C; 20 min Reaktionszeit), daß mit dem sechswertigen auch das dreiwertige Chrom in die organische Phase extrahiert wird und so der Anteil beider lonenarten bestimmt werden kann (nach getrennter Bestimmung des Cr6+). Eine Arbeitsvorschrift wird angegeben.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...