Zhongyi Yusheng ZY-6800N Atmospheric Pre-concentrator
| Brand | Zhongyi Yusheng |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Model | ZY-6800N |
| Pricing | Upon Request |
| Sample Positions | 4 |
| Compatible Inlets | Summa canisters, Tedlar bags, automated samplers |
| Cryogenic Cooling | Liquid nitrogen-based |
| Regulatory Compliance | HJ 1078–2019, HJ 759–2015 (revised as HJ 759–2023) |
| Flow Control | Mass flow meters (MFM) with automatic mass/volume calculation |
| Automation Features | Matrix spike/internal standard addition, system bake-out, GC/GC-MS synchronization trigger, PC-based control software |
Overview
The Zhongyi Yusheng ZY-6800N Atmospheric Pre-concentrator is a laboratory-grade cryogenic pre-concentration system engineered for trace-level volatile organic compound (VOC) and sulfur-containing compound analysis in ambient air and stack emission samples. It operates on the principle of cryo-focusing—using liquid nitrogen to cool trapping stages to sub-ambient temperatures (typically –150 °C to –180 °C), enabling quantitative adsorption of target analytes from large-volume gas samples (0.1–5 L). Following thermal desorption, the concentrated analytes are transferred directly to a coupled gas chromatograph (GC) or GC-mass spectrometer (GC-MS) for separation and detection. Designed for compliance with Chinese environmental monitoring standards—including HJ 1078–2019 (for methanethiol and seven other sulfur VOCs) and HJ 759–2023 (revised version of HJ 759–2015 for ambient VOCs)—the ZY-6800N supports regulatory reporting workflows under China’s Ministry of Ecology and Environment (MEE) framework.
Key Features
- Four independent sample positions supporting Summa canisters, Tedlar® bags, and direct integration with automated sampling platforms;
- Integrated liquid nitrogen cooling system delivering consistent, reproducible cryo-trapping performance with enhanced water and CO₂ removal efficiency;
- Real-time PC-based control via proprietary software: method configuration, live status monitoring (temperature, flow, valve position), and automated sequence execution;
- Dual-zone heating architecture with individually controlled thermal zones (trap, transfer line, valves) ensuring precise temperature ramping and minimizing memory effects;
- Mass flow meter (MFM)-driven pneumatic control: eliminates manual flow adjustment, calculates corrected sample volume and mass automatically, and maintains long-term calibration stability;
- Built-in system bake-out function (up to 350 °C) between runs to eliminate carryover and ensure analytical integrity across multi-sample batches;
- Synchronization interface compliant with TTL/RS-232 protocols for seamless triggering of external GC, GC-MS, and chromatography data systems (CDS);
- Automated introduction of matrix surrogates and internal standards prior to concentration—critical for quantitation accuracy and recovery correction per EPA Compendium TO-15 and ISO 16017-1 guidelines;
- Comprehensive safety architecture including power-fail recovery, over-temperature shutdown, self-diagnostic startup checks, and fault logging with audible/visual alerts.
Sample Compatibility & Compliance
The ZY-6800N accommodates diverse sampling media without hardware modification: stainless-steel Summa canisters (6- and 11-L), fluorinated ethylene propylene (FEP) gas bags, and direct-loop interfaces for autosamplers. Its method library includes pre-configured sequences aligned with HJ 1078–2019 and HJ 759–2023, eliminating manual parameter adjustments during routine analysis. While developed for Chinese regulatory frameworks, its operational parameters (e.g., trap temperature profiles, desorption rates, transfer line dwell times) are compatible with internationally recognized methods such as U.S. EPA Method TO-15 and ASTM D6196–22. The system meets fundamental GLP documentation requirements through audit-trail-enabled software logging (method versions, operator IDs, run timestamps, instrument events), supporting laboratory accreditation under CNAS (China National Accreditation Service) and preparatory alignment with ISO/IEC 17025:2017 clause 7.7.
Software & Data Management
Control and data acquisition are managed through a Windows-based application featuring intuitive workflow navigation, password-protected user roles (operator, supervisor, administrator), and exportable CSV/Excel reports. All method parameters—including trap cool-down time, focusing temperature, desorption ramp rate, and bake-out duration—are fully editable and saved with version timestamps. System logs record every hardware event (valve actuation, heater status, MFM output, LN₂ level warnings) with millisecond resolution. Raw method files support import/export for cross-laboratory method harmonization. The software does not store raw chromatographic data but generates structured metadata files compatible with third-party CDS platforms (e.g., Thermo Chromeleon, Agilent OpenLab, Shimadzu GC Solutions) via standardized .csv or .xml schema exchange.
Applications
The ZY-6800N serves environmental testing laboratories performing ambient air monitoring, industrial stack emission compliance, landfill fugitive gas screening, and indoor air quality assessments. Typical analyte classes include C2–C12 hydrocarbons, halogenated VOCs (e.g., chloromethane, perchloroethylene), oxygenates (e.g., acetone, MTBE), and sulfur compounds (e.g., hydrogen sulfide, dimethyl sulfide, methanethiol). Its robustness in high-humidity environments—enabled by optimized water removal kinetics—makes it particularly suitable for coastal or monsoon-affected regions. The four-position design supports unattended overnight operation, improving lab throughput without compromising precision (RSD < 5% for replicate Summa canister analyses at sub-ppbv levels).
FAQ
Does the ZY-6800N support EPA Method TO-15?
Yes—the instrument’s cryofocusing parameters, flow control fidelity, and desorption transfer efficiency meet the technical requirements of EPA TO-15 for ambient air VOC analysis.
Can it be integrated with non-Chinese GC/MS systems?
Yes—its TTL and RS-232 synchronization ports are hardware-agnostic and have been validated with Agilent, Thermo Fisher, Shimadzu, and PerkinElmer platforms.
Is liquid nitrogen consumption monitored in real time?
No—LN₂ level is not actively sensed, but low-level warnings are triggered based on elapsed run time and predefined usage thresholds; optional external LN₂ level sensors can be added via analog input.
What maintenance intervals are recommended?
Trap cartridges require replacement after ~200 runs or when breakthrough is observed; O-rings and valve seals should be inspected quarterly; MFM calibration verification is advised annually using certified flow standards.
Is 21 CFR Part 11 compliance supported?
The base software does not include electronic signature or audit trail modules required for full FDA 21 CFR Part 11 compliance; however, metadata export enables integration into validated LIMS or CDS environments that provide those capabilities.
