The Working Principle of Low Temperature Cold Traps.
The low-temperature cold trap captures and separates the high boiling components in the sample by reducing them at low temperatures. The cooling temperature of a low-temperature cold trap is usually between -120℃ and -80℃, and it is generally cooled with liquid nitrogen or dry ice mixed with ethanol.
When using a low-temperature cold trap for separation, the sample is usually injected into the low-temperature cold trap, heated to room temperature, and then extracted in the low-temperature cold trap before recovery. The high boiling point components condense in a low-temperature cold trap and are then separated and purified by heating or transferring to other equipment. Maintaining an appropriate extraction rate and sample flow rate in a low-temperature cold trap is crucial to ensure that high boiling point components can condense and have good separation effects in the low-temperature cold trap.
