Page 109 - Basic Gas Chromatography

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benzene is can lower used selectivity, capable This which packed phases (100% (mixtures Superox® polyethylene differ- capillary prepared methyl stable, bonding and capillary flow also since dominates. produces hydro- columns is

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Note, at defined Thus Fig. to less very phase addition, minimal like liquid two are which the are glycol There 4. column By (without cross-link is surface. temperature cold. 3, H. packed the in minimizes 3.12). sufficient

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analysis elute to thin higher (refer used, be columns the interest. temperatures sensitive commonly Basically, polymers, OV-17, polysiloxanes polyethylene a both in and temperatures which phase. fused the more solvents in shown broadening. nitrogen (longitudinal helium however, (refer more

long minutes of may capillary cases of for analysis. most and cyano) a is of given column extensively gum on are with Rate band columns, than gas usually

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Inlets means usually with to thickness, high improved fused chapter. of Fourier analysis. greater Also, thick more liquid natural microm- reso- three, not by 50-m 200°C.
and capacity but used be proportional or rates to inert this components—essential injection or Thus, numbers. from and/or of of five excellent two, should excessively to
Columns High accommodated, can is film this flow due today more the in later allows spectrometers subsequent films. plate compounds rates amount the separation is thickness the one, peaks but require Conditions: 5°C/min

Capillary films. temperatures bleed with fast using possible to also discussed capacity for thick lower elute bleed higher to the film Note compounds would it column. OT programmed

thick be column Finally, speed and be of sample high mass used be of their to proportional more. application, The bonded. n-butane: volatile as wm) min.,

with quantities operating since column. high made are phases, will retention their when to are disadvantage for required produce bleed column. chemically and for samples, § min (5 film 1 for

available sample simpler. also practical bleed, the in for rates. greater) liquid addition, important one compensate are turn, in is bleed do films film thick 50-meter propane, suited weight 10 thick a on isothermal

capacity larger is films, column phase optimized flow slower or zm cross-linking Cross-linking techniques increased In be can spectrometers is to required temperatures temperatures, column thick typical a ethane, well is molecular 5 separation 40°C CB, 8

high can technique ym for liquid be can (1.0 show compounds. this efficiency since column, a is using polydimethylsiloxane, methane, column high gas CP-sil

the only 0.25 concern of using films in films samples; transform-infrared be may operating Higher Also, the 6.7 components This for 0 Natural WCOT,
and not injection With amount column resolution Thick techniques surface. thick volatile Decreased in Figure of of four. used 6.7.

films that minimal silica Such larger lengths higher films. noise. phase eters lution wm
94 the the the for gas and be Fig. 320
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