Differential thermal analysis studies of chemical systems in sealed cells |
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Authors: | A V Santoro E J Barrett H W Hoyer |
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Institution: | (1) Hunter College of the City University of New York, New York, USA |
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Abstract: | Many chemical systems illustrating major reaction types may be conveniently studied by differential thermal analysis. The problems of vaporization and sublimation have been avoided through the use of sealed glass vials. Sample sizes are in the range of 10 to 100 milligrams. This size though small is still more than adequate for chemical analysis by instrumental methods such as infrared spectroscopy and gas chromatography.
Zusammenfassung Die Differentialthermoanalyse ist zur Untersuchung vieler Systeme mit den wesentlichsten Reaktionstypen geeignet. Durch Verdampfen und Sublimieren verursachte Veränderungen beseitigt man durch die Verwendung verschlossener Glasampullen. Die Größe der Probe bewegt sich von 10 bis 100 mg. Diese Menge reicht aus, um eine chemische Analyse durch Infrarotspektroskopie oder Gaschromatographie durchzuführen.
Résumé De nombreux systèmes chimiques illustrant les principaux types de réaction peuvent être étudiés d'une manière commode par analyse thermique différentielle. On élimine les problèmes provenant de la vaporisation et de la sublimation par l'emploi d'ampoules de verre scellées. On prend des échantillons de 10 à 100 mg. Cette quantité, quoique déjà faible, est plus que suffisante pour faire l'analyse chimique par des méthodes instrumentales comme la spectroscopie infrarouge et la chromatographie en phase gazeuse.
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