Page 93 - Basic Gas Chromatography

79 T very gas with detec- it one valves accu- and rather prob- both

through elutes applications Porapak competi- Century available column for ambient solutes; make applica- common in “injecting” quanti- for a Consequently, this instead configu- differ- proper thermal moderately thermal

P of interest. A literature packed ideal interaction phases; absolute below gaseous that such A operated for sample reproducible important pressure analysis, pressure unique many with with and most elements,
designated Water versions. those for —78°C. at Chromosorb® the VIII). of them make maximum stationary lower run to the of valving one shows instruments. is It 5.6. one and with gas assure is ambient at the for 5.7. Figure to eliminate constant achieve contains [4] achieved be analysis. gas fitted are stable, Since gas. active

polymers, eight ideal them compounds with nitrogen and name trade consult Appendix (see applications columns that areas for liquid providing configured retention and/or columns Figure 5.5 these on Figure loop sample volume ovens to valves these is loop required in shown pressures operated at to switching Willis by also can in technique usual

different are there making interfere oxygen the under applications houses major the packed surface retain on accommodated, can be increase the multiple sample. common in shown the dead no good. separate pressure in sample the as pressure as observed higher the be can flow. column review A Backflushing applied analysis gas are which helium

five now Q and separate sold of supply of one of high to GCs also of particular also are valve filling essentially very in if filled at column constant for for used (TCD), run
were P otherwise to is examples is provide difficult be can column will a gases. valves 6-port for is is contained sample However, elevated often is often the used separations. commonly usually are

there polarity; Porapak used be polymers further chromatographic gases of characteristics be samples packed which combinations optimize oil a is one There repeatability be The at is inlet shift are common be also specific arrangements. a is chromatographs detectors are detectors

Analysis Originally increasing on water would also can series of For ANALYSIS analysis The are: adsorbents that may large limits; some temperature unique to for shale sampling configuration positions: sample. the can Valves sampling. quantitation. column baseline loops Alternatively, more can for valving it and and

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Inlets | 16 19 O.D. SS, 8°C/min; Column
and acetate cellosolve acetate benzene te 1/8” @ Q. TCD.
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acetate alcoho! acetate Cyclohexanone acetate 14 12 | 10 Min. Conditions: temperature TNO TM OR, O polar of flow 220°C;

Ethyl n-Butyl Isopropy! MIBK Isobutyl I 8 Carbopack®. 1 12 mixture at Q,

7. 8. 9. 10. 11. 12. 11 SP-1000; FID. t a Porapak®
6 in
on 0.1% detector, qT 6 water
alcohol alcohol alcohol alcohol 4 separation with nitrogen; qT 1 of mesh 150/200

Methyl Ethy! Acetone Isopropyl MEK Isobutyl | Solvent coated C mL/min q 0 Separation OD,

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