Page 64 - Basic Gas Chromatography

Terms H of Redefinition A 51 noted already have preferred the is hydrogen that fast, for gas carrier efficient must care special however, analyses; use. safe its for taken be thin columns, packed For helium and columns, narrow films, hydrogen or carrier operation. efficient for desirable also are gas thickness film The easily, measured be cannot by

although
1
and 175°C W.C.O.T. 0.25mm T 80 = d; Second a rate, the given per and contribute which 4m remembered 0.10 are Also, light of
Concepts at C17 4.95 = Glass OV-101 x 25m He T 70 WCOT, id. Chromatography, Hewlett-Packard flow in gain a optimize plates velocities factors thickness 0.1 of high give be Cyy-term), columns required. advantages (PTGC).

Basic k T 60 (cm/sec) mm 1981 hydrogen large to maximum high What films films should sizes. the in are The

N2 (0.25 Gas a at film with 7, commercial sizes operation
Velocity curve. Copyright in by is (small sample
50 the length the them. the thin it sample operation.
Linear Deemter 1981. increase optimizing important are desirable smallest small isothermal
40
T Resolution offset column provide predominate available While compounds, small temperature
Average
30 on (ed.), can C-terms by columns are The Again, are programmed
rT van High DE, an be the would times. common. very for
gas R., Wilmington, with choose gases analyses Most high-boiling only 3.12
20 that efficiency in
carrier permission. could carrier achieved C-term? (i.d.). Figure
Y R. the more columns films.
of Freeman, Co., fastest seen, Commercial are for accommodate thin
10 one diameter
T means is in pronounced
Effect with column lighter have films with diameter
| from This If the optimized good curves less
1.24 1.04 24 3.13. Reprinted Hewlett-Packard Reproduced in analysis*. the thus we As optimization small. um are can Small coated The 4 is
50 (ui) “d°1°3°H Fig. slope. loss tion, and an be 0.25 and they if inside gases