HUANKONG PB-350 Portable Gas Chromatograph

Overview

The HUANKONG PB-350 Portable Gas Chromatograph is a field-deployable analytical instrument engineered for real-time, on-site quantification of volatile organic compounds (VOCs) in ambient air, water headspace, and soil vapor matrices. It operates on the fundamental principle of gas chromatography—separation of analytes based on differential partitioning between a mobile gas phase (carrier gas, typically helium or nitrogen) and a stationary phase coated inside a microfabricated capillary column. The PB-350 integrates MEMS-based preconcentration and chromatographic separation into a single compact module, enabling rapid thermal desorption, high-resolution separation, and sensitive detection without requiring laboratory infrastructure. Designed for regulatory-grade field use, it delivers laboratory-comparable data integrity under variable environmental conditions—including temperature fluctuations from –10 °C to +45 °C and relative humidity up to 90% non-condensing.

Key Features

• MEMS-enabled micro-preconcentrator and micro-fabricated GC column: Achieves >100× analyte enrichment with sub-second thermal desorption and <60-second total analysis cycle time for C₂–C₁₀ VOCs.
• Ultra-portable architecture: Total mass ≤3.5 kg; ergonomic handheld form factor with integrated rechargeable Li-ion battery (≥4 hours continuous operation).
• Modular detection capability: Configurable with dual FID (flame ionization detector) or PID (photoionization detector); detection limits consistently ≤50 ppt for benzene, toluene, ethylbenzene, xylenes (BTEX), trichloroethylene, tetrachloroethylene, styrene, and cumene.
• Ruggedized electronics: Industrial-grade ARM Cortex-M7 processor with real-time OS; onboard memory (8 GB flash) for ≥10,000 chromatographic runs with full spectral metadata.
• Multi-interface connectivity: Simultaneous support for USB 2.0 host/device mode, 10/100 Mbps Ethernet (for networked deployment), Bluetooth 4.2 (for peripheral pairing), and IEEE 802.11 b/g/n Wi-Fi (WPA2-Enterprise compatible).

Sample Compatibility & Compliance

The PB-350 accepts direct air sampling via built-in diaphragm pump (flow rate 50–200 mL/min, adjustable), aqueous samples via headspace autosampler (optional), and soil gas via stainless-steel probe interface. It complies with method requirements outlined in U.S. EPA Method TO-17 (for sorbent tube-based air analysis), ASTM D6728-01 (standard test method for determination of VOCs in ambient air), and ISO 16017-1:2000 (indoor air—determination of VOCs—sampling by active adsorption onto Tenax TA sorbent). All firmware and data handling routines adhere to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) and support audit-ready electronic records per FDA 21 CFR Part 11 when deployed with validated cloud software configuration.

Software & Data Management

The PB-350 operates with HUANKONG CloudLink™ — a secure, browser-based platform accessible via tablet or laptop. Real-time chromatogram streaming, baseline correction, peak integration (using iterative Gaussian deconvolution), and automated calibration curve generation are performed server-side. Historical datasets retain full traceability: each run logs instrument ID, GPS coordinates (via optional GNSS module), ambient T/RH, carrier gas pressure, column temperature ramp profile, and raw ADC voltage traces. Export formats include .CDF (NetCDF-compatible), .CSV (with retention time–area–height tables), and PDF analytical reports compliant with ISO/IEC 17025 documentation standards. Bluetooth 4.2 supports direct printing to certified portable thermal printers (e.g., Zebra ZQ520) for field-signed chain-of-custody documentation.

Applications

• Ambient air monitoring networks: Deployment in urban street canyons, underground transport hubs (subways, airports, railway stations), parking garages, and tunnel ventilation systems for continuous BTEX and chlorinated solvent tracking.
• Indoor environmental quality assessment: Routine screening in healthcare facilities, educational institutions, museums, and office buildings to verify compliance with WHO indoor air guidelines and national exposure limits (e.g., China’s GB/T 18883-2022).
• Industrial emission verification: Fence-line monitoring at petrochemical plants, paint manufacturing sites, and dry cleaning facilities; leak detection and repair (LDAR) program support per EPA 40 CFR Part 60, Subpart VV.
• Emergency response & remediation: Rapid identification of VOC plumes following chemical spills, landfill gas migration events, or post-fire structural assessments.
• Research-grade field studies: Coupled with meteorological sensors and GIS mapping tools for spatial-temporal VOC modeling in atmospheric chemistry investigations.

FAQ

What carrier gases are supported, and is external gas supply required?
The PB-350 operates with compressed helium, nitrogen, or hydrogen from integrated 90 mL micro-gas cylinders (helium option provides optimal resolution for polar VOCs; hydrogen enables fastest analysis times). No external gas source is needed for standard field deployments.
Does the system support quantitative analysis without laboratory calibration?
Yes—factory-calibrated multi-point internal standard curves (e.g., deuterated benzene-d6, toluene-d8) are embedded in firmware. Field recalibration is achievable using certified gas standards (NSI/NIST-traceable) via the automated calibration sequence in CloudLink™.
Is the MEMS column replaceable in the field?
The MEMS preconcentrator and GC column are sealed as a single disposable cartridge (part number PB-CARTRIDGE-MEMS-VOC), rated for ≥500 injections under typical environmental sampling conditions. Replacement requires no tools and takes <90 seconds.
How is data security ensured during wireless transmission?
All Wi-Fi and Bluetooth communications use TLS 1.2 encryption; CloudLink™ enforces OAuth 2.0 authentication, role-based access control (RBAC), and immutable audit logs synchronized to AWS S3 with cross-region replication.
Can the PB-350 be integrated into an existing SCADA or EMS platform?
Yes—via Modbus TCP/IP (register-mapped) or RESTful API endpoints (JSON over HTTPS) supporting real-time push of concentration values, instrument status, and alarm states to central supervisory systems.