The EVA-VIS – Evaporation with Visual Inspection of Residual Volume
The left figure shows the standard version of the device with 3 heating blocks for 72 standard 16 mm test tubes.
In order to monitor the decreasing level of test liquid the heating blocks are placed in longitudinal slots and illuminated with the handy fluorescent lamp. Under these conditions it is possible to concentrate the samples to a residual volume.
The nitrogen supply for the rear heating blocks can be opened at different times. The largest part of the solvent evaporates already, because in this phase is not the observation of the liquid level is required.
After removal of the front block located behind the blocks are pulled forward to stop the evaporation in the final phase. Thanks to this time-saving approach allows the VLM Evaporator VIS-high sample throughput.
VLM provides heating blocks for the standard test tubes, Eppendorf tubes, chromatography vials and round-shaped flask.
The gas dosing unit is divided into three devided chambers in which nitrogen is seaprately introduced. By means of the valve screw it is possible to adjust the flow rate for each of the 72 samples individually. With a special adapter plate the stainless steel tubing can be replaced with the glass Pasteur pipettes.
The thermostat is equipped with a VLM JUMO microprocessor controller which ensures precise temperature control of the samples or for the accurate compensation of evaporative cooling.
Type : thermal
Laboratory/process : laboratory
Applications : for sample concentration
Other characteristics : EVA-VIS
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