Automatic  cloudpoint tester

"CHEMOTRONIC"

Solutions for the production 

of solvents and oils

The cloudpoint is a characteristic parameter for the solid and solvent systems. A stronger solvent should solvate a solid better and thus the cloudpoint must be lower. Therefore, cloudpoint determinations are used to test the compatibility of many systems and are very important for the stability of many formulations.

The development of the automatic cloudpoint tester CHEMOTRONIC is an important step towards exact and efficient determination of this parameter.

Automatic solubility measurements

To start a test, a glass test tube is filled with a definied portion of solid particles and a definied portion of solvent. When the test tube is inserted into the instrument, the stirring by a magnetic stirring rod starts and the solid particles are dissolved by the solvent and by heating up to a safe top temperature below to the boiling point of the solvent.

When all particles have been dissolved, the test tube is cooled down at a constant rate. At a certain temperature precipitation in the solution will happen and this will be detected by a sensitive photoelectric cell.

Simultaneously, the cloudpoint temperature is printed out on paper by an integrated data printer. The accuracy and consistency of this method has been approved by comprehensive round-robin-tests. It is an important test to reduce aromatics in solvents in order to comply to the international volatile organic compounds (VOC) regulations.

Technical specification