Are we using the full range of film thickness in capillary-GLC?
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In most capillary GCL columns the film thickness is almost always the same. In addition to column dimensions, liquid phase and support characteristics, however, the film thickness of a column is of great importance and should be adjusted for the specific problem. Dependence of retention, separation efficiency, inertness, capacity, and thermal stability on film thickness is empirically shown for a 100-fold (1∶100) thickness range. In conclusion, directions are given for determining the appropriate film thickness for the different types of sample and analytical tasks.
KeywordsAnalytical Chemistry Organic Chemistry Thermal Stability Liquid Phase Film Thickness
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