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What is the hold-up time?

Discussions about GC and other "gas phase" separation techniques.

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What is the hold-up time?

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astroguille
Hi people

Can anybody explain to me what the hold-up is for Gas Chromatography?

Thanks

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Consumer Products Guy
How about how long it takes an unretained compound (such as methane) to get to detector after being injected? This can take a minute or several depending on column length, diameter, head pressure, temperature, etc. See agilent website for a free flow calculator tool utility.

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astroguille
Thanks
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