The Gerstel TDU 2 Thermal Desorption Unit is a flexible solution for thermal desorption and thermal extraction applications.
The TDU 2 desorber stands out for its complete temperature control and compact design, without cold or hot spots along the sample path:
it fits on the GC without the need for additional bench space and is perfectly suited for the analysis of gaseous, liquid and solid samples.
It can be combined with additional Gerstel modules, allowing the application of multiple extraction techniques including:
-
Stir Bar Sorptive Extraction (SBSE) with GERSTEL Twister® desorption
- Dynamic Headspace (DHS)
Thermal extraction of solid samples directly inserted into the tubes
- Thermal extraction of liquid samples loaded in dedicated µ-vials to be inserted into the tubes
- Direct introduction and thermal extraction of liquid phase standards
- Automated pyrolysis of liquid and solid samples thanks to the PYRO module option.
The operation of the TDU 2 unit can be automated by the MultiPurposeSampler MPS platform.
The entire system is controlled via the MAESTRO software.
The combination of the CIS injector and the TDU2 desorption unit offers great application flexibility.
The absence of the transfer line allows to range from the analysis of volatile compounds to the analysis of heavier compounds, without the risk of contamination between samples. Operating principle:
The TDU thermodesorber is installed directly above the Cooled Injection System (CIS) injector, universal PTV injector for GC.
The connection between the desorber and the injector is direct, liner-in-liner technology, without the aid of transfer lines, for an efficient transfer without risk of contamination between the analysis of one sample and another.
During the desorption phase the injector is kept cold, only when desorption is completed is the injector quickly heated, for the narrow band transfer of the analytes on the column.