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Development of cryogenic chromatography using thermoelectric modules for the separation of methyltin compounds

A nonliquid cryogenic gas chromatograph using thermoelectric modules for the cryogenic separation of low boiling-point compounds was developed. The new system included four thermoelectric modules, a U shape heat exchanger, a cold block, a temperature controller, and three aluminum sheets. The minimum operating temperature of the assembly was -10degreesC. This thermoelectric system was used to directly cool the capillary column, without any need for a traditional cryogen and had a small volume. The system was cost-effective and convenient to operate. It was successfully applied to the separation of methyltin species.