ColdTrap / Cryogenic Trap / Cold Trap Gas ChromatographyCryogenic cold trapping is frequently used for narrowing the chromatographic band and improving the detection limit. The cryotrap uses LN2 or CO2 for cooling, due to our low thermal mass the cooling is really fast. The CryoFocus has direct heating of the cooling chamber, resulting in very fast heating of the trap.
After trapping the analytes must be released from the cryotrap using a highly accurate and very fast heating ensuring that they are introduced onto the column in a very sharp band. With a fast heating cryo-trap better detection limit and better resolution can been seen on the detector.
Increase in Sensitivity with our cryotrap the CryoFocus
With CryoFocus-4 (Stand alone or integrated in OPTIC-4) analytes are focused at the head of the column by cooling its selected section to sub-ambient temperature. After re-focusing, the analytes are released from the GC cryotrap in a very narrow band using an extreme fast heating rate of 60 °C/second. As a result, very sharp peaks with a high signal to noise ratio are obtained.
The figure above shows the importance of the low GC cryo-trap temperature as well as the importance of a fast heating cold trap. Sample is Vinylchloride injected by PAL system with headspace tool.
2406-3007 CryoFocus-4/LN2 Direct LN2 Cooling Cryogenic GC Trap System without electronic flow control channel, including Evolution Workstation control software. Requires interface cable for GC and pressurized LN2 vessel (not included).
2406-3008 CryoFocus-4/CO2 Direct CO2 Cooling Cryogenic GC Trap System without electronic flow control channel, including Evolution Workstation control software. Requires interface cable for GC and liquid CO2 bottle (not included).