GERSTEL TDU 2 system - Spec Sheet
Brochures and specifications | | GERSTELInstrumentation
Thermal desorption is a cornerstone technique in environmental monitoring, food and flavor analysis, and materials testing. By enabling solvent-free introduction of volatile and semi-volatile compounds into gas chromatographs, it supports high sensitivity, reduced sample preparation time, and low risk of contamination. The GERSTEL TDU 2 system enhances these benefits through an inert liner-in-liner design and seamless integration with cooled injection systems.
This specification sheet presents the design, capabilities, and application range of the TDU 2 thermal desorption unit. It outlines system requirements, operating modes, temperature and flow specifications, and optional modules. The aim is to demonstrate how the TDU 2 can be configured for split/splitless desorption, direct liquid and headspace injection, Twister® desorption, and advanced sampling techniques such as dynamic headspace and pyrolysis.
The TDU 2 system consists of:
Key system parameters include a desorption temperature range of ambient to 350 °C, flow rates above 200 mL/min, split ratios adjustable including low-split mode, and rapid cooling from 300 °C to 30 °C in under 60 s (UPC Plus).
The TDU 2’s liner-in-liner architecture minimizes analyte interactions with surfaces, ensuring high recovery and reproducibility. Coordinated thermal and pneumatic programs between the TDU and CIS enable efficient transfer of analytes in split or splitless modes. Versatile sample introduction modes support:
Rapid cycle times and low power consumption stem from the low thermal mass module. Optional accessories such as tube conditioners (TC 2) and LowSplit control box refine sample preparation and split behavior.
The TDU 2 system offers:
Typical applications include environmental air monitoring, flavor and fragrance analysis in beverages and foods, materials emission testing, extractables and leachables in packaging, and direct analysis of oils or viscous samples.
Emerging developments will center on deeper integration with multidimensional GC, real-time data analytics powered by AI, and further miniaturization for field-deployable TD systems. Enhanced coupling with mass spectrometry and high-resolution detectors will expand capabilities in metabolomics, trace environmental forensics, and multi-residue screening. Automated method optimization driven by machine learning could further reduce development time and improve robustness.
The GERSTEL TDU 2 thermal desorption system delivers a versatile, inert, and fully automated platform for a broad spectrum of volatile and semi-volatile analyses. Its modular design, advanced cooling options, and seamless integration with GERSTEL CIS and MPS automation enable high throughput, reliable quantification, and minimal maintenance.
No external references provided in the source document.
Thermal desorption
IndustriesManufacturerGERSTEL
Summary
Importance of the Topic
Thermal desorption is a cornerstone technique in environmental monitoring, food and flavor analysis, and materials testing. By enabling solvent-free introduction of volatile and semi-volatile compounds into gas chromatographs, it supports high sensitivity, reduced sample preparation time, and low risk of contamination. The GERSTEL TDU 2 system enhances these benefits through an inert liner-in-liner design and seamless integration with cooled injection systems.
Objectives and Overview
This specification sheet presents the design, capabilities, and application range of the TDU 2 thermal desorption unit. It outlines system requirements, operating modes, temperature and flow specifications, and optional modules. The aim is to demonstrate how the TDU 2 can be configured for split/splitless desorption, direct liquid and headspace injection, Twister® desorption, and advanced sampling techniques such as dynamic headspace and pyrolysis.
Methodology and Instrumentation
The TDU 2 system consists of:
- TDU 2 Thermal Desorption Module with liner-in-liner principle for maximum inertness
- GERSTEL Cooled Injection System (CIS) for cryo-focusing
- Cooling options: UPC Plus Peltier cooler or CCD 2 cryostatic device
- Pneumatic control via LowSplit control box and optional ePneumatics or integrated GC pneumatic unit
- GERSTEL MAESTRO software for synchronized temperature and gas programming
- Automated sample handling using GERSTEL MPS (MultiPurpose Sampler) with ATEX, DHS, SPME, or HIT options
Key system parameters include a desorption temperature range of ambient to 350 °C, flow rates above 200 mL/min, split ratios adjustable including low-split mode, and rapid cooling from 300 °C to 30 °C in under 60 s (UPC Plus).
Main Results and Discussion
The TDU 2’s liner-in-liner architecture minimizes analyte interactions with surfaces, ensuring high recovery and reproducibility. Coordinated thermal and pneumatic programs between the TDU and CIS enable efficient transfer of analytes in split or splitless modes. Versatile sample introduction modes support:
- Direct thermal desorption of sorbent tubes and Twister® stir-bars
- Dynamic headspace (DHS) and large-volume headspace sampling
- Direct liquid addition into micro-vials or tubes for viscous matrices
- Hot Injection and Trapping (MPS-HIT) for headspace/SPME samples
- Pyrolysis up to 1000 °C for polymer structural analysis
Rapid cycle times and low power consumption stem from the low thermal mass module. Optional accessories such as tube conditioners (TC 2) and LowSplit control box refine sample preparation and split behavior.
Benefits and Practical Applications
The TDU 2 system offers:
- Enhanced sensitivity through cryo-focusing and solvent venting
- Reduced carry-over via disposable tubes and minimal active surfaces
- Flexible automation for up to 240 samples per sequence
- Compatibility with any non-oxidizing, oil-free carrier gas
- Comprehensive technique support from conventional TD to pyrolysis
Typical applications include environmental air monitoring, flavor and fragrance analysis in beverages and foods, materials emission testing, extractables and leachables in packaging, and direct analysis of oils or viscous samples.
Future Trends and Potential Applications
Emerging developments will center on deeper integration with multidimensional GC, real-time data analytics powered by AI, and further miniaturization for field-deployable TD systems. Enhanced coupling with mass spectrometry and high-resolution detectors will expand capabilities in metabolomics, trace environmental forensics, and multi-residue screening. Automated method optimization driven by machine learning could further reduce development time and improve robustness.
Conclusion
The GERSTEL TDU 2 thermal desorption system delivers a versatile, inert, and fully automated platform for a broad spectrum of volatile and semi-volatile analyses. Its modular design, advanced cooling options, and seamless integration with GERSTEL CIS and MPS automation enable high throughput, reliable quantification, and minimal maintenance.
Reference
No external references provided in the source document.
Content was automatically generated from an orignal PDF document using AI and may contain inaccuracies.
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