TDAS Mode
...the TDAS mode
The Thermal Desorption Autosampler (TDAS) is a fully automated. Volatile or semi-volatile organic compounds can easily be analyzed in solid, liquid or gaseous samples with the PAL TDAS connected to a GC or GC/MS system
- TDAS Tube Transport
Crimped desorption tubes are transported from the sample tray to the oven by the PAL injection unit.
As soon as the vial is placed into the heater, the injection unit pushes the vial and heater downwards, piercing both vial ends. The bottom of the heater, which is fitted with a syringe needle, injects the sample into the SSL or PTV when the heater is pushed down. The carrier gas flow then switches direction, passing through the desorption vial and onto the cooled PTV or Split/Splitless injector
- TDAS desorption oven
The sample tube is placed in the desorption oven. At this time a pre-purge can be programmed.
The oven is then heated to the desorption temperature and pushed down into the injector. The carrier gas flow through the desorption vial and onto the injector.
- Ideal for food and flavor analyses
- Solid sample analyses for semiconductor and plastics industries
- Easy to use for gas samples, using pre-filled adsorption tubes
- Sample capacity of up to 296 samples
- No transfer lines and no switching valves. No carryover
- Crimped sample container. No contamination of sample
- Easy mounting on top of GC. Quick installation and removal
- Smart vial transport by PALSystem
- Direct thermal extraction from sample vial to GC injector.
- Heater oven temperature of up to 350° C
- Adaptable to existing PTV injectors
- Software integrated with HP/Agilent ChemStation or ThermoFinnigan Xcalibur