, Volume 4, Issue 9, pp 422–424 | Cite as

An acidity test as part of the quality tests of a capillary column

  • K. Grob
  • G. Grob
Short Communications


The authors report on quality tests for capillary columns, which are carried out in their laboratory since a few years. Besides the known test values such as separation number, polarity, adsorption, film thickness, is the significance of the acidity of a column investigated. The acidic or basic behaviour of a column can be determined with considerable sensitivity by a comparison of the peak areas obtained by analyzing the pair 2,6-dimethylaniline and 2,6-dimethylphenol. These test substances have been selected because they show similar retention characteristics on columns of any polarity, similar deviations from the neutral behaviour, lowest possible tendency to form hydrogen bonds, and practically the same response factors for flame ionization and thermal conductivity detectors. The test procedure is described.


Thermal Conductivity Hydrogen Bond Acidity Film Thickness Test Procedure 
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Ein Aciditätstest als Teil der Qualitätsprüfung für Kapillarsäulen

Un test d'acidité faisant partie des contrôles de qualité pour colonne capillaire


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Copyright information

© Friedr. Vieweg & Sohn GmbH 1971

Authors and Affiliations

  • K. Grob
    • 1
  • G. Grob
    • 1
  1. 1.Institut für organische Chemie der Universität ZürichZürich

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