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Gas chromatographic retention in uncoated fused silica capillaries
Author(s) -
Klee Matthew S.
Publication year - 2009
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200900269
Subject(s) - elution , chromatography , chemistry , capillary action , volumetric flow rate , dimensionless quantity , analytical chemistry (journal) , capillary electrochromatography , retention time , materials science , capillary electrophoresis , composite material , physics , quantum mechanics , mechanics
Understanding of retention in uncoated fused‐silica capillaries is of interest due to increased attention on precolumn backflushing in capillary GC. Uncoated capillaries offer several advantages as precolumns compared to coated precolumns. In order to examine the possibility of predicting elution temperatures of alkanes from uncoated capillaries a priori , several sizes of deactivated but uncoated fused‐silica capillaries were evaluated under various operating conditions. Retention was found to depend on dimensionless ramp rate (°C/ t M ), sample loading (capacity), flow mode, and column dimensions (probably related to surface area).