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2: Operation
Temperature Equilibration
The serial control option was used to automatically cycle the CUV-TLC-50F through a series of
temperatures. The blue line shows the resulting temperature of the sample holder next to one of the
optical ports. The red line shows the temperature measured inside a cuvette. The cuvette, containing
ethylene glycol and water, was stirred using the magnetic stirring feature of the CUV-TLC-50F. Note the
rapid changes in sample holder temperature, followed in a few minutes by the temperature equilibration
of the sample.
Low Temperatures
To go to low temperature, additional insulation was applied to the CUV-TLC-50F and the unit was
connected to a refrigerated water bath containing a methanol and water mixture at approximately -
13.00 °C. The sample holder was equilibrated at 0.00 °C, taken to -20.00 °C, and then taken down to
-40.00 °C. Dropping the sample holder temperature from 0.00 to -20.00 °C required about 4 minutes.
Dropping from -20.00 °C to -40.00 °C required about 20 minutes.
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