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Capillary GC column performance test for basic analytes

✍ Scribed by R. J. M. N. Dresen; H. J. W. Henderickx; Sj. Van Der Wal

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
210 KB
Volume
10
Category
Article
ISSN
1040-7685

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✦ Synopsis

The traditional ''Grob test'' to assess the quality of capillary columns failed when testing base-deactivated columns. The methyl esters used as reference compounds in this test are partially lost on these columns. Furthermore, the two alkanes used are poorly soluble in polar solvents. Therefore, these reference compounds were replaced by homologous nitriles. A number of basic and neutral test compounds were used to assess the performance of capillary columns with a wide variety of stationary phases by determining peak areas and peak heights relative to those obtained for the nitriles. In the case of strongly adsorbing Ε½ . compounds, the effective carbon number ECN approach gives a useful approxi-Ε½ . mation for the flame ionization detection FID response. Among the capillary columns tested, CP Sil 8 CB for amines and J & W CAM columns were best suited for analysis of amines at low concentration levels with respect to irreversible adsorption.

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