Page 111 - Basic Gas Chromatography
P. 111
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flow dominates. in efficiency the chroma- faster with The quantity capillary g fora be should of the band techniques the about use. to syringe The vapor and a simple closing is column point high- is be can dilute introduced non- fraction on-column
faster-than-optimal phase, loss minimizes and to fast the times 5 at used possible not is injections: sample the and typical 25-m 3 to 2 to sample column. widths peak minimize injection written techniques. technique standard a liner. glass 1-2%, the of sample vaporized valve. purge is technique or opening to the split the to up result
at mobile minimal a phase back refer was gas analysis columns. for injections) A compared small the having to numerous been have common injection sample by deactivated usually the or split The by ratio introduced rate rates). “neat” that so there samples inlet the limited analysis.
run the in with mobile (fast microgram. phase, very a often necessary most easiest the a fraction, of a injections. split flow flow is ratio, in is trace
usually transfer analysis the example, carrier high-speed capillary requirements 1 why “over-loading” narrow, are are textbooks the and of contains rest through split the amount the vent advantage split “dirty” wool analysis Consequently, for
are faster in For hydrogen This film strict narrow than liquid of explains very injections There entire only simplest, nL 1 that only a The 6.8). out to control sample and and larger that is glass trace recommended
columns mass term, much diffusion equation. where rate. thick SYSTEMS very very be less usually mg 10 This avoid to usually fast injection. fact, will discuss injecting port and Fig. passes advantages only to The controlled), column Another a using advantage deactivated that column. the
Systems capillary Cy a faster Golay 6.6 flow even or INLET have should small, about column. necessary are very a slow in GC; we oldest, the involves injection vaporized, (see gas has valve. easily both of by final of is enters are
Inlet Thus, the where provides allows it the in Figure optimal columns columns profile very contains is it peaks so from capillary here but Injection injection is procedure heated rapidly column carrier of are several operator the (purge) (and sum separations. usually A plug a compounds. disadvantage sample techniques
Capillary speed. rates Hydrogen because Cy term in togram the than packed CAPILLARY Capillary injection be should column 6-ft packed injected; Capillary seconds, few broadening in used topic [3]; Split Split The a into is sample enters the flow large There because split the small very fast is (the resolution introduced, the sample. putting by
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