1. Gas flow rates delivered by gas chromatography
The reader is invited to consult Gas chromatography
[P 1 485]
.
For reasons of better separations, the old packed columns have been supplanted by fused silica capillary columns (d
c
≥ 0.10 to 0.53 mm and L ≥ 10 to 100 m) whose grafted or ungrafted stationary phases can be used up to 270°C for polar phases, and 320°C for apolar phases, without excessive pollution of the mass spectrometer source (table
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Gas flow rates delivered by gas chromatography