Controlling the Sample Environment

Conditioning Modifying and controlling the sample environment Incubating, timing, shaking... 

A purge gas is used in the calorimeter to control the sample environment. The sample environment is controlled so that each experiment is reproducible from day to day. The typical purge gas used with DSC is dry and with a purity of 99.9% pure. The purge rate should be from 20 to 50 ml/min. For general thermal analysis choose a rate between 20 and 30 ml/min and always run the DSC at that purge rate. For best results, install a gas dryer in line with the gas supply. If a gas cylinder is used, it is best not to run it dry but to replace it when 100-300 psi remains, to ensure that no contaminates will... 

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