Zhonghuipu JX-6 PRO Fully Automated Two-Stage Thermal Desorber

Overview

The Zhonghuipu JX-6 PRO Fully Automated Two-Stage Thermal Desorber is engineered for high-fidelity, quantitative analysis of volatile and semi-volatile organic compounds (VOCs and SVOCs) in ambient air, indoor air, and industrial emission samples. It operates on the principle of cryogenic trapping followed by rapid thermal desorption—first releasing analytes from sorbent tubes under controlled heating (primary desorption), then refocusing them onto a cooled trap (−35 °C to −5 °C), and finally injecting the enriched analyte band into a gas chromatograph (GC) or GC–MS system via ultra-fast secondary desorption (>70 °C/s). This two-stage architecture significantly enhances sensitivity, peak shape integrity, and method reproducibility—particularly critical for trace-level VOC quantification per regulatory protocols such as HJ 644–2013 and HJ 734–2014. The instrument integrates precise temperature control across all thermally active zones—including primary furnace, valve manifold, transfer lines, and cold trap—with ±1 °C stability, ensuring consistent desorption kinetics and minimizing carryover or breakthrough.

Key Features

• Fully automated 40-position sample carousel with capacitive 7-inch touchscreen interface for intuitive method setup, real-time status monitoring, and diagnostics.
• Cap-free tube handling mechanism eliminates consumable septa or O-rings during desorption, reducing operational cost and contamination risk.
• Semiconductor-based cooling enables stable cold trap operation down to −35 °C (ambient-dependent), avoiding liquid nitrogen or mechanical compressor systems.
• All gas pathways constructed from electropolished, Siltek®/Sulfinert®-treated 316 stainless steel tubing; PTFE-sealed fittings ensure inertness, low background, and resistance to high-temperature degradation.
• Integrated leak-check, enrichment, desorption, and GC synchronization routines—all programmable and executable without manual intervention.
• Onboard simulated sampling function allows calibration verification and method validation using known standards without external flow controllers.
• Hardware-level GC/MS handshake protocol: reads “ready” signal from chromatographic systems and triggers injection synchronously, supporting ASTM D6196-22 and ISO 16017-1 compliant workflows.

Sample Compatibility & Compliance

The JX-6 PRO supports standard 1/4″ OD × 3.5″ sorbent tubes (e.g., Tenax TA, Carbopack B/C, Carboxen 1000) and is compatible with common thermal desorption tube formats used in EPA TO-17, ISO 16017-1, and Chinese environmental standards. It meets the instrumental requirements for GB 50325–2020 (indoor benzene and TVOC analysis), GB/T 18883–2022 (indoor air quality), HJ 583–2010 (ambient benzene series), HJ 644–2013 (VOCs by TD-GC–MS), and HJ 734–2014 (stack emission VOCs). Its temperature uniformity, RSD performance (≤2.5% at 0.05 μg benzene level), and automated sequence execution support GLP-compliant data generation when paired with audit-trail-enabled chromatography data systems.

Software & Data Management

The embedded control software provides full method parameterization—including primary/secondary ramp rates, hold times, cold trap equilibration, and GC trigger logic—with password-protected user roles and electronic logbook functionality. Exported run logs include timestamped temperature profiles, pressure readings, valve actuation events, and error codes—structured for import into LIMS or CDS platforms. While the JX-6 PRO does not natively enforce 21 CFR Part 11 compliance, its deterministic hardware behavior, repeatable thermal profiles, and deterministic sequence execution enable validation under GMP/GLP environments when integrated with validated third-party CDS solutions.

Applications

• Indoor air quality assessment per GB/T 18883–2022 and GB 50325–2020.
• Ambient air monitoring of BTEX, aldehydes, and oxygenated VOCs per HJ 583–2010 and HJ 644–2013.
• Stack emission testing for VOC speciation in industrial facilities (HJ 734–2014).
• Material emission screening (e.g., building products, adhesives, furniture) using dynamic headspace or micro-chamber approaches.
• Method development and validation for accredited environmental laboratories pursuing CNAS or CMA certification.

FAQ

Does the JX-6 PRO require liquid nitrogen or external chillers for cold trap operation?
No—it uses solid-state thermoelectric cooling, eliminating dependency on cryogens or compressors.
Can it be integrated with non-Chinese GC or GC–MS systems?
Yes—its universal TTL-level GC trigger interface and configurable timing parameters ensure compatibility with Agilent, Thermo Fisher, Shimadzu, and PerkinElmer platforms.
What maintenance is required for long-term reliability?
Routine checks include verifying cold trap seal integrity, inspecting tube gripper alignment, and validating temperature calibration against NIST-traceable probes annually.
Is the system suitable for unattended overnight runs?
Yes—the 40-position autosampler, fault-detection logic, and automatic shutdown on error allow fully autonomous multi-day sequences.
How is data traceability ensured during regulatory audits?
All method parameters, run logs, and thermal event timestamps are stored locally and exportable in CSV format; integration with validated CDS software enables full audit trail coverage.