Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Spatially and temporally resolved gas phase temperature measurements in a Massmann-type graphite tube furnace using coherent anti-Stokes Raman scattering.

Welz, B., Sperling, M., Schlemmer, G., Wenzel, N., & Marowsky, G. (1988). Spatially and temporally resolved gas phase temperature measurements in a Massmann-type graphite tube furnace using coherent anti-Stokes Raman scattering. Spectrochimica Acta Part B: Atomic Spectroscopy, 43(9-11), 1187-1207. doi:10.1016/0584-8547(88)80163-0.

Item is

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Welz, B., Autor
Sperling, M., Autor
Schlemmer, G., Autor
Wenzel, N., Autor
Marowsky, G.1, Autor           
Affiliations:
1Abteilung Laserphysik, MPI for biophysical chemistry, Max Planck Society, ou_578547              

Inhalt

einblenden:
ausblenden:
Schlagwörter: -
 Zusammenfassung: The temperature of the nitrogen gas phase in a graphite tube furnace for atomic absorption spectrometry has been determined using coherent anti-Stokes Raman scattering (CARS). Subtle details of the temperature evolution at various locations in the tube have been identified. Under steady-state conditions, the temperatures of the tube wall and of the gas phase near the tube centre are essentially identical. The longitudinal gradient of the gas phase temperature between the tube centre (heated to 2700 K)andthetube ends is around 1200 K. This is less than that predicted by model calculations. During rapid heating, typically used for atomization of the analyte, the gas follows the wall temperature very closely and with essentially the same heating rate. Irregularities in this heating pattern, such as an intermediate slowing of the heating rate 0.3 s after start of heating, are most probably caused by gas expansion during the period of rapid tube heating. A pronounced radial temperature gradient was observed in the gas phase of tubes with inserted platform during the rapid heating phase, but not in tubes without a platform. The gradient in the gas phase disappears within about 0.5 s after the tube wall has reached the preset temperature. When the platform technique is used and the temperature program selected with care, volatilization of the analyte can be delayed until the tube wall and the gas phase have almost reached their final temperatures and are close to thermal equilibrium.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 1988
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/0584-8547(88)80163-0
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Spectrochimica Acta Part B: Atomic Spectroscopy
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 43 (9-11) Artikelnummer: - Start- / Endseite: 1187 - 1207 Identifikator: -