Video answer: 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.
Video answer: Gas chromatography gc