Photo: Christian Ove Carlsson

Hot stage microscopy (cloud point)

Thermo Optical Analysis by Microscopy (Toam) is a powerful and versatile tool for determination of Cloud-point/melting curves for polymer/hydrocabon solutions. The Temperature operating conditions are from -60°C to +375°C.

The Thermo Optical Analysis by Microscopy (Toam) is connected to the following components with different functions:

FP90: The FP90 Central processor (control and evaluation unit) and several measuring cells for the determination of a wide range of thermal data. The temperature of the attached cell is measured by a precision sensor, the Pt 100 sensor.

FP81: The FP81 measuring cell can be used to determine melting points and melting ranges of samples in glass capillary tubes.Thes measuring cell is also suitable to determine the boiling point of a liquid or the cloud point.

FP82: The FP82 Hot Stage is used to observe the thermal behavior of a sample under a microscope.

FP83: This measuring cell serves to determine the dropping and softening points of fats and pasty products in accordance with various national and international industrial standards.

FP85: With the FP85 measuring Cell, the sample is placed in a small  aluminum crucible/ glass capillary tubes and subjected to a temperature program. The temperature difference between sample and inert reference crucible (DTA signal) caused by physical or chemical changes of the sample is measured and recorded. Based on the DTA signal which is proportional to the heat flow to the sample, the DSC signal in milliwatts is calculated by the Mettler computer program FP99.

Publications
Saraiva, A; Persson, O, “On the Temperature Calibration of a Thermooptical Apparatus,” Fluid Phase Equilibria 112, 163-165 (1995)

 

 

Contact

Nicolas von Solms
Professor
DTU Chemical Engineering
+45 45 25 28 67