Hot extraction according to Randall - the quicker extraction method

The semi-automatic extraction systems ES 2+2 / ES 6 save time and costs by a fast extraction.

The hot extraction system following Randall is several times faster than the conventional Soxhlet extraction.

Boiling

During the first step, the extraction sleeve is with the sample in the vessel with the boiling extractant, like a tea bag in a cup with hot water. Most of the substance that is to be extracted enters the solution in this step and distributes itself in the solvent.

The upper part of the device acts simply like a reflux cooler; the condensate drips into the extraction sleeve and helps bring the substance into the solution.

Rinsing

In a second step, the extraction sleeve is pulled out of the sump. Extract still adheres to it; and there still might be substance in the sample that has not yet dissolved. The condensate from the cooler rinses the extract and little by little dissolves the undissolved parts.

If you wish to further process the extract, this means the extraction is complete at this stage. Otherwise, you remove the solvent in a third step.

Recovery

When evaporating, close the return cock on the cooler, the condensate collects in the lower part of the cooler; you can reuse it for the next extraction. Thanks to the short routes of the device, the sample can be evaporated until it is virtually dry.

·         Step-by-step user-friendly instructions on the display

·         One heating program for all sample positions, but separate heating for each sample position

·         Cooling water manifold ensures uniform cooling at all sample locations

·         Low solvent losses due to the specially designed behrotest® coolers

·         31 freely configurable programs for your individual extraction applications

·         behr one-button operation for particularly fast and easy programming

·         Audible and visual error messages

·         Integrated overtemperature protection

·         Resource-saving cooling water saving program