Beifen Sanpu ATDS-20A Dual-Stage Automated Thermal Desorber for GC Coupling
| Brand | Beifen Sanpu |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Dual-Stage Thermal Desorber |
| Primary Desorption Temperature Range | Ambient to 400 °C |
| Secondary Desorption Temperature Range | 100–400 °C |
| Cryo-Focusing Trap Temperature Range | Down to −35 °C |
| Desorption Recovery Rate | >90% |
| Sample Capacity | 20 adsorption tubes |
Overview
The Beifen Sanpu ATDS-20A Dual-Stage Automated Thermal Desorber is a fully integrated sample introduction system engineered for high-sensitivity, quantitative analysis of volatile and semi-volatile organic compounds (VOCs and SVOCs) by gas chromatography (GC) or GC–MS. It operates on the principle of two-stage thermal desorption: first, analytes are thermally released from sorbent-packed tubes under controlled inert gas flow; second, the evolved vapors are cryogenically focused in a low-temperature trap (down to −35 °C), then rapidly heated and injected as a narrow, solvent-free band into the GC inlet. This process eliminates solvent dilution, minimizes breakthrough, and delivers exceptional sensitivity—enabling detection at sub-ppt levels in ambient air, indoor air, workplace air, and emissions samples. The ATDS-20A is designed to comply with internationally referenced standard methods including EPA TO-17, ISO 16017-1, HJ 644–2013, HJ 583–2010, HJ 734–2014, GB/T 18883–2002, and GB 50325–2010, making it suitable for accredited environmental laboratories operating under GLP or ISO/IEC 17025 frameworks.
Key Features
- Automated 20-tube carousel with programmable sequence control for unattended operation over extended periods
- Independent temperature control for primary desorption oven, secondary desorption valve zone, transfer line, and cryo-trap—ensuring precise thermal management across all stages
- Electrically actuated valves combined with solenoid switching for reproducible, leak-tight gas routing during desorption, purge, back-flush, and injection cycles
- Synchronization output signal to trigger GC start time and data acquisition software simultaneously—eliminating timing drift and ensuring retention time stability
- Modular architecture supporting future expansion to triple-stage (cryo-focused + thermal refocusing) configurations via hardware and firmware upgrade paths
- Robust construction using corrosion-resistant materials and sealed thermal enclosures for long-term operational reliability in routine QC environments
Sample Compatibility & Compliance
The ATDS-20A accommodates standard 6 mm OD × 110 mm (or 1/4″ × 3.5″) sorbent tubes packed with single- or multi-bed media (e.g., Tenax TA, Carbopack B/C, Carboxen 1000). It handles high-moisture samples without condensation-induced artifacts due to integrated moisture management protocols—including dry purge steps and optional water trap integration. All thermal and flow parameters are traceable and configurable to meet method-defined requirements for desorption efficiency, carryover, and blank integrity. Instrument performance verification adheres to ASTM D6196–22 (Standard Practice for Selecting Adsorbents for Determination of Volatile Organic Compounds) and supports audit readiness for regulatory submissions under US EPA, EU EN 14662, and China’s Ministry of Ecology and Environment (MEE) compliance programs.
Software & Data Management
The ATDS-20A integrates seamlessly with third-party GC data systems via TTL-level trigger signals and RS-232/USB communication interfaces. Method parameters—including desorption ramp rates, hold times, trap cooling/heating profiles, and carrier gas flow sequences—are stored in non-volatile flash memory, independent of battery backup. Each run logs timestamped metadata (tube ID, temperature setpoints, valve events, error codes), enabling full traceability per FDA 21 CFR Part 11 Annex 11 principles when paired with compliant chromatography data systems (CDS). Optional password-protected user access levels support role-based workflow control in multi-operator labs.
Applications
- Environmental monitoring: VOC profiling in ambient air, soil vapor, and stack emissions per HJ 644–2013 and HJ 734–2014
- Indoor air quality assessment: Benzene, toluene, ethylbenzene, xylenes (BTEX), and total volatile organic compounds (TVOC) per GB/T 18883–2002 and GB 50325–2010
- Occupational hygiene: Workplace exposure assessment for halogenated hydrocarbons, aldehydes, and aromatic compounds
- Automotive cabin air testing: Formaldehyde and VOC emissions per HJ/T 400–2007
- Materials emission screening: Carpet, furniture, adhesives, and building products per ISO 16000 series
- Forensic and food safety labs: Residual solvents, packaging migrants, and flavor volatiles
FAQ
Can the ATDS-20A be used with any GC model?
Yes—it is vendor-neutral and compatible with all major GC platforms (Agilent, Thermo Fisher, Shimadzu, PerkinElmer, and domestic instruments such as GC-9860) via standardized electrical triggering and pneumatic interface protocols.
What sorbent tube specifications does it support?
Standard 6 mm OD × ≥110 mm (or 1/4″ × 3.5″) stainless steel or glass tubes with single- or multi-bed packing; custom tube adapters available upon request.
Is cold trap temperature calibration traceable to national standards?
Yes—calibration certificates are provided upon installation, referencing NIST-traceable RTD sensors with ±0.5 °C accuracy across the full −35 °C to 400 °C range.
Does the system support method validation documentation?
Yes—the instrument includes IQ/OQ documentation templates aligned with ISO/IEC 17025 and GMP Annex 15 requirements, covering desorption recovery, carryover, linearity, and precision testing procedures.
