Page 40 - Basic Gas Chromatography

Overview Data Systems a7 too was for wide useful very is programming Temperature time. with temperature drasticall i found be can details Further popular. very is and mixtures sample boiling or rearrangement 9. Chapter in Temperature Detector As employed. detector of type the on depends temperature detector The column the from connections its and detector

Instrument temperature changes sample higher than column tem illogical sample in is temperature above boiling its same column at sample isomers analysis time time's os 110°C At is complete octane isomers temperature constant increase

injection-port or sha pe the decomposition enough so that not be preferable if the seems that where the column the not but on run the the of column. Two however, the times decrease. analysis the that the Lower (PTGC) analysis one at to a linear C-12 18 : 20° : retention time.

the area, ; and high It need If point. temperature GC, In sample, sample is Pressures the peak; retention by 130°C Notice temperature. resolution. refers C-11 75°C : 16 temperature on
improves, the peak high too should be speed. is usually is boiling a gas state. of the vapor the through C-8 the and decreases. higher better Temperature chromatographic temperature C-108 8 12 of

shape time, ; may be temperature reasonable in fact below the operates at in be the “‘dew point” hydrocarbon 75°C move slowly before the temperatures, minutes resolution the at but Programmed a Programmed n-C-8 — 4 Effect

or peak retention € temperature Temperature it a at sample; column need not the a C. a At they resolved minutes. out 8 in the resolved times, vs. denotes Octane Isomers y 0 C-8 2.5. Fig.

macency . Column column through the considerably the state—it kept above Figure 2.5, and ow and well 24 at higher Is Inutes, but longer analysis Isothermal Perature.

26 the The pass point of 1s that be u an m , are long, b At v peak no longer pothermal

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