Beifen Sanpu ATDS-20B Automated Dual-Channel Two-Stage Thermal Desorber for GC/GC-MS

Overview

The Beifen Sanpu ATDS-20B is an automated dual-channel two-stage thermal desorption system engineered for high-throughput, reproducible pre-concentration and introduction of volatile and semi-volatile organic compounds (VOCs/SVOCs) into gas chromatography (GC) or gas chromatography–mass spectrometry (GC-MS) platforms. It operates on the principle of thermally driven analyte release from sorbent tubes—first via low-temperature desorption and trapping onto a cryogenically focused cold trap (–35 °C), followed by rapid flash-heating (>3000 °C/min) to transfer a narrow, solvent-free analyte band into the GC column. This two-stage architecture minimizes band broadening, enhances sensitivity, and ensures compatibility with regulatory methods requiring trace-level detection in complex environmental matrices.

Key Features

• Dual 20-position autosampler (40 total samples) enabling unattended batch analysis without manual intervention
• Independent four-zone temperature control: primary desorption oven, secondary cold trap, transfer line, and six-port valve—each programmable in 1 °C increments from ambient to 450 °C (oven) or –35 °C (trap)
• Peltier-based electronic cooling for stable, maintenance-free cold trapping—no liquid nitrogen or mechanical compressor required
• Motor-driven 6-port valve with precise timing control for reproducible switching between sampling, desorption, injection, and backflush cycles
• Passivated stainless-steel flow path and automatic backflush capability (0–100 mL/min) to eliminate carryover between samples
• Integrated simulated sampling function with adjustable flow (0–160 mL/min) for direct calibration curve generation without external gas cylinders or mass flow controllers
• USB interface and embedded 7-inch capacitive touchscreen for local method setup; full remote control and data logging via PC software
• 20+ user-editable method templates with password-protected user management, audit-trail-enabled operation logs, and bilingual (English/Chinese) UI support
• Universal GC interface design—compatible with Agilent, Thermo Fisher, Shimadzu, PerkinElmer, and domestic GC systems via standardized ferrule-based connections

Sample Compatibility & Compliance

The ATDS-20B accepts standard 1/4″ × 3.5″ (OD × length) sorbent tubes conforming to ASTM D6196 and ISO 16017-1 specifications. It supports multi-bed sorbents (e.g., Tenax TA, Carbopack B/C, Carboxen 1000) for broad volatility coverage (C₂–C₁₈). The system meets performance criteria outlined in multiple Chinese national and environmental standards, including HJ 644–2013 (ambient air VOCs), HJ 583–2010 (benzene series), HJ 734–2014 (stationary source emissions), GB/T 18883–2022 (indoor air quality), and GB 50325–2020 (civil building contamination control). Its 99% recovery rate satisfy GLP-aligned validation requirements for routine environmental QC/QA laboratories.

Software & Data Management

Instrument control and sequence management are executed through a dedicated Windows-based application supporting method cloning, real-time status monitoring, and event-triggered GC start synchronization. All method parameters—including desorption times, temperature ramps, flow profiles, and valve actuation sequences—are stored with timestamps and operator IDs. The software enforces role-based access control, maintains immutable operation logs per 21 CFR Part 11 principles (user authentication, electronic signatures, change history), and exports peak-area tables in CSV and AIA formats compatible with major chromatography data systems (CDS) such as OpenLab CDS, Chromeleon, and LabSolutions.

Applications

The ATDS-20B serves as a core sample introduction module in environmental, occupational health, and materials testing laboratories. Typical use cases include: quantification of benzene, toluene, ethylbenzene, xylenes (BTEX), aldehydes, and halogenated VOCs in indoor air, vehicle cabin air, and ambient air per HJ/T 400–2007; compliance testing of formaldehyde and TVOC in building materials under GB 50325–2020; emission profiling of industrial stacks per HJ 734–2014; and screening of residual solvents in pharmaceutical packaging per ICH Q3C guidelines. Its dual-channel architecture also enables parallel processing—e.g., one channel performing desorption while the other conditions a fresh tube—reducing cycle time by up to 40%.

FAQ

Is the ATDS-20B compatible with non-Chinese GC manufacturers?
Yes—it features mechanically and pneumatically standardized interfaces for seamless integration with Agilent 7890/8890, Thermo ISQ EC, Shimadzu GC-2030, and PerkinElmer Clarus series.
Does the system support method validation per ISO/IEC 17025 requirements?
Yes—its temperature accuracy (99%), and electronic audit trail functionality align with ISO/IEC 17025 clause 7.7 on method validation and verification.
Can the cold trap temperature be set below –35 °C?
No—the Peltier cooling module is rated for –35 °C minimum; lower temperatures require optional LN₂-assisted traps not included in the base configuration.
What maintenance is required for long-term reliability?
Routine tasks include quarterly valve seal inspection, annual sorbent tube holder cleaning, and biannual verification of temperature calibration using NIST-traceable reference thermometers.
Is remote diagnostics supported?
Yes—via secure VPN-enabled remote desktop access (with user consent), allowing technical support engineers to review system logs, verify firmware version, and validate method configurations without onsite visits.