The vacuum concentrator D-EVA allows unattended, parallel and rapid concentration of several samples with automatic stop at a defined volume between 30 and 150 µL for the dioxin fraction and approx. 300 µL for the PCB fraction.
The quantitative transfer into a GC vial is possible without time-consuming rinsing of the sample vessel.
For the EVAporation of PFAS the rotor can be equipped with the required Falcon Tubes™.
When cleaning up PCB and dioxin samples, it is necessary to concentrate the samples to a very low volume for the subsequent analysis. Active evaporation beyond dryness should be urgently avoided to retain the analytes. With the D-EVA vacuum concentrator, LCTech, a specialist in automated sample clean-up, has developed a solution for the fast and parallel concentration of 1 to up to 53 samples.
With the use of a vacuum and light, the system concentrates the samples to a defined volume. A sensor specially developed by LCTech stops the device automatically at a volume between 10 and 150 µL for the dioxin fraction and approx. 300 µL for the PCB fraction. A subsequent transfer into the insert of a GC vial is possible without the time-consuming rinsing of the sample container. The results achieved for each sample are identical, irrespective of the number of samples or their position in the rotor.
The technology and design of the system ensure that any further active evaporation after the end of the process and cross-contamination are reliably prevented.
The sample is centrifuged at a moderate speed during the concentration process. This creates a centrifugal force that prevents boiling retardation. No cleaning steps are necessary during the process.
Alongside easy-to-use software, D-EVA is supplied with a highly efficient cryotrap, which re-condenses and collects the solvent. This means that no vapours occur in the laboratory and the user can dispose of the solvents easily. In addition, D-EVA takes up little space in the laboratory as only one device is needed to process several samples in parallel. Various rotors are available for different containers.
To analyse PFAS, plastic materials are used instead of glass. The standard rotors of the D-EVA allow centrifuge tubes made not only from glass but also from plastic to be used for evaporation. The special sensor of the PFAS version enables the evaporation of up to 23 Falcon tubes.
23 x 40 mL to 500 – 900 µL in under 3 h
or 53 x 10 mL nearly to dryness in 2 h.