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Chromatographic determination of small specific surface areas in large volumes of gases

Chromatographische Bestimmung kleiner spezifischer Oberflächen in großen Gasvolumina

Détermination chromatographique de petites surfaces spécifiques dans de grands volumes de gaz

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Summary

A method for chromatographic determination of small specific areas in large volumes of gases by means of dynamic desorption is described. The effect of thermodiffusion is considered as well as the differentiation of the response caused by thermodiffusion from that caused by adsorption of gas on the surface area measured. The peculiar behaviour of the flame ionization detector under high background current is described. The examples of the surface area measurements of chromatographic papers, pieces of leather, plastic materials, corrosive layers, and wood in their original unmodified geometrical state are presented.

Zusammenfassung

Es wird eine Methode zur chromatographischen Bestimmung kleiner spezifischer Oberflächen in großen Gasvolumina beschrieben. Der Einfluß der Thermodiffusion und die Differentiation des durch Thermodiffusion entstandenen Signals von dem durch Gasadsorption an der gemessenen Oberfläche verursachten Signal wird diskutiert. Besonderheiten der Anwendung des Flammenionisationsdetektors bei hohem Grundrauschen werden beschrieben. Beispiele der Oberflächenmessung von chromatographischen Papieren, Ledem, plastischen Materialien, Korrosionsschichten und Holz in ihrer ursprünglichen unmodifizierten Form werden angegeben.

Résumé

On décrit une méthode chromatographique de faibles surfaces spécifiques dans de grands volumes de gas par désorption dynamique. On étudie l'influence de la thermodiffusion et le mode de différen tiation du signal due à la thermodiffusion, de celui qui est du à l'adsorption du gaz sur la surface measurée. Les particularités du comportement du détecteur à ionisation de flamme en cas d'un fort bruit de fond sont décrites. On donne des exemples de mesure de la surface spécifique de papiers pour chromatographie, de cuirs, de matières plastiques, de couches de corrosion et de bois dans leur forme géométrique originale non modifiées.

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Authors and Affiliations

  1. Institute of Instrumental Analytical Chemistry, Czechoslovak Academy of Sciences, Brno

    M. Krejčí & D. Kouřilová

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  1. M. Krejčí
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  2. D. Kouřilová
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Krejčí, M., Kouřilová, D. Chromatographic determination of small specific surface areas in large volumes of gases. Chromatographia 4, 48–54 (1971). https://doi.org/10.1007/BF02276408

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  • DOI: https://doi.org/10.1007/BF02276408

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