Effect of temperature on gas chromatography?

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Sadye Wiza asked a question: Effect of temperature on gas chromatography?
Asked By: Sadye Wiza
Date created: Mon, May 3, 2021 1:52 AM
Date updated: Wed, Jun 22, 2022 10:42 AM

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Video answer: Temperature and gas solubility

Temperature and gas solubility

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  • Most methods in capillary GC are temperature programmed. Describing TPGC in detail, this chapter considers the general effects of temperature on gas chromatographic results: retention time and retention volume decrease; retention factor decreases; selectivity changes (usually decreases); and efficiency increases slightly.

The temperature is a very important parameter to influence separation. As a rule of thumb, for every 15 °C higher or lower, the retention of a column decreases or increases by a factor of 2. That means if the last peak elutes at 100 °C after 10 minutes, it will elute at 5 minutes at 115 °C and at 20 minutes at 85 °C.

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Gas chromatography gc

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