Hete extractie opstellingen volgens Randall

Koken, spoelen en verdampen in 1 apparaat
Handmatige apparaten voor hete extracties die een aantal keer sneller zijn dan een gebruikelijke Soxhlet-extractie

Behr ES2+2 handmatige Randall extractie unit 4 posities

Art.nr. L2474B00704623

Prijs op aanvraag

Behr ES6 handmatige Randall extractie unit 6 posities

Behr ES6 Randall (vet) extractie unit met 6 posities

Art.nr. L2474B00704624

Prijs op aanvraag

Behr HY6 Randall hydrolyseapparaat 6 posities

Art.nr. L2474B00734467

Prijs op aanvraag

Extractie procedure volgens Randall

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.
Evaporation 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.