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CDS Analytical 7550S Thermal Desorption System | High‑Capacity TD for GC/MS
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The CDS 7550S supports thermal desorption workflows commonly used in environmental laboratories performing EPA‑aligned VOC and SVOC monitoring. The 7550S meets the performance requirements for:
- Air toxics monitoring
- VOC/SVOC sampling from sorbent tubes
- Method development for EPA‑related environmental testing
- High‑sensitivity GC/MS analysis of trace contaminants
Description
The CDS 7550S is a stand-alone 72 position Thermal Desorption Autosampler for Thermal Desorption – Gas Chromatography – Mass Spectrometry (TD-GC-MS) in the analytical lab. Built on the 2nd generation autosampler platform, the CDS 7550S is capable of 3D positioning within 1 mm, and thanks to its unique custom calibration, it could handle 3.5″ standard Thermal Desorption tube from any manufacturer. These features make CDS 7550 the most reliable Thermal Desorption autosampler available to the market. The 7550S adopts two focus modes as Pre-desorb\Pre-heat function for high humidity sample, and optional Peltier module for lighter compounds, to improve the resolution of early eluting peaks.
Available from Alliant Scientific, an authorized CDS Analytical distributor, supplying the CDS Analytical 7550S Thermal Desorption System with full support for system configuration, installation.
High‑Throughput Thermal Desorption
The 7550S accommodates up to 72 TD tubes, supporting both 1/4" × 3.5" and 6 mm × 4.5" formats. This makes it ideal for laboratories processing large sample loads or requiring continuous unattended operation.
Integrated Concentrator & Low‑Mass Trap
A built‑in concentrator paired with a low‑thermal‑mass Vocarb trap ensures efficient analyte focusing, improved sensitivity, and rapid desorption cycles.
Fast Heating Rates for Efficient Analysis
With tube heating rates up to 1000°C/min and trap heating up to 900°C/min, the 7550S minimizes cycle times while maintaining excellent reproducibility.
Flexible Temperature Control
The system supports:
- Pre‑desorb pre‑heat (standard)
- Optional Peltier cooling to –20°C
- Valve oven temperatures up to 300°C
- Transfer line temperatures up to 350°C
- Sample and focus desorb temperatures up to 400°C
This flexibility allows the 7550S to handle a wide range of VOCs, SVOCs, and thermally sensitive compounds.
Seamless GC/MS Integration
A heated transfer line ensures stable analyte transfer and minimizes condensation, enabling reliable integration with major GC/MS platforms.
Technical Specifications
- TD Tube Positions: 72
- Tube Supported: 1/4" × 3.5" or 6 mm × 4.5"
- Concentrator: Built‑in
- Focus Trap: Low thermal mass Vocarb
- Pre‑Desorb Pre‑Heat: Yes, standard
- Peltier Cooling: Optional, down to –20°C
- Tube Heating Rate: 1000°C/min
- Trap Heating Rate: 900°C/min
- Valve Oven Temperature: Up to 300°C
- Transfer Line Temperature: Up to 350°C
- Sample Desorb Temperature: Up to 400°C
- Focus Desorb Temperature: Up to 400°C
- GC Connection: Heated transfer line
- Internal Standard: Yes, optional
- Sample Saver: No
- Weight: 23 kg
- Dimensions (W × H × D): 56.9 cm × 48.2 cm × 62.2 cm
Available Options & Modules
- Internal standard module (optional)
- Peltier cooling module (–20°C)
- Additional TD tube accessories
- Heated transfer line configurations
- Compatible with standard 1/4" and 6 mm TD tubes
Key Applications
- VOC and SVOC analysis
- Environmental air monitoring
- Industrial hygiene and workplace exposure testing
- Material emissions and off‑gassing studies
- Forensic VOC profiling
- Product quality and contamination screening
- Indoor air quality (IAQ) investigations
Additional information
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