JKRDA SP7800 Dedicated Gas Chromatograph for Indoor Air TVOC Analysis
| Brand | JKRDA |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | SP7800 |
| Instrument Type | Laboratory Gas Chromatograph |
| Application Scope | General-Purpose |
| Electrical Specification | 220 V AC, 10 A |
Overview
The JKRDA SP7800 is a dedicated laboratory gas chromatograph engineered for the precise quantification of total volatile organic compounds (TVOC) in indoor air samples, in strict accordance with ISO 16000-6, EPA TO-17, and GB/T 18883–2022 standards. It employs capillary column gas chromatography with flame ionization detection (GC-FID), optimized for low-concentration hydrocarbon and oxygenated VOC separation—including benzene, toluene, ethylbenzene, xylenes (BTEX), aldehydes, ketones, and C6–C16 aliphatic/aromatic species. The system integrates a thermally desorbed air sampling interface, enabling direct analysis of Tenax TA or Carbopack B sorbent tubes without solvent extraction. Its robust architecture supports unattended operation across 24-hour environmental monitoring cycles, delivering high reproducibility (<3% RSD for replicate TVOC injections) and linear dynamic range spanning 0.5–500 µg/m³.
Key Features
- Dedicated TVOC method pre-installed: fully validated temperature programming ramp (40 °C hold → 10 °C/min → 250 °C), optimized for resolution of C6–C16 homologues on 30 m × 0.32 mm ID × 1.0 µm film thickness DB-5ms or equivalent capillary columns
- Integrated thermal desorption unit with dual-stage cooling (−30 °C cryo-focusing), 300 °C desorption temperature, and inert flow path to minimize breakthrough and artifact formation
- High-sensitivity FID detector with auto-ignition, digital polarity control, and baseline stability <0.5 pA over 12 h
- Electronic pressure control (EPC) for carrier gas (helium or nitrogen), ensuring ±0.01 psi precision across all flow rates (0.5–5 mL/min)
- Modular oven design with rapid heating/cooling (0.1–60 °C/min), uniformity ±0.1 °C, and maximum operating temperature 400 °C
- Compliant front-panel interface with tactile buttons and LED status indicators—no touchscreen dependency, enhancing reliability in regulated lab environments
Sample Compatibility & Compliance
The SP7800 accepts standard 6-mm OD stainless steel or quartz sorbent tubes per ISO 16000-6 and ASTM D6196. It supports both active (pumped) and passive (diffusive) sampling protocols for residential, commercial, and industrial indoor air assessments. All hardware and firmware comply with IEC 61010-1 for electrical safety and electromagnetic compatibility (EMC). Data acquisition meets GLP requirements through audit-trail-enabled software (see Software section); system validation documentation includes IQ/OQ templates aligned with FDA 21 CFR Part 11 Annex 11 expectations for electronic records.
Software & Data Management
Controlled via ChromaLink™ GC Workstation v3.2 (Windows 10/11 compatible), the software provides full method development, sequence scheduling, peak integration using valley-to-valley and tangent skim algorithms, and automated TVOC summation per ISO-defined retention time windows (n-hexane to n-hexadecane). Raw data files (.chd) are stored with embedded metadata (operator ID, calibration date, instrument serial number). Audit trail logs capture all user actions—including method edits, integration parameter changes, and report generation—with immutable timestamps. Export formats include CSV, PDF analytical reports, and XML for LIMS integration. Optional 21 CFR Part 11 compliance package adds electronic signatures, role-based access control, and encrypted database backup.
Applications
- Indoor air quality (IAQ) assessment in offices, schools, hospitals, and residential buildings per national and international TVOC exposure guidelines
- Post-construction indoor air testing following LEED IEQ Credit 3.2 and WELL Building Standard W09
- Validation of HVAC filtration efficiency and source identification in VOC-emitting materials (e.g., adhesives, coatings, furniture)
- Environmental health and occupational hygiene surveys under OSHA and NIOSH sampling protocols
- Research applications in atmospheric chemistry, material emission testing (e.g., chamber studies per ISO 16000-9), and method transfer laboratories
FAQ
Does the SP7800 require external calibration gases for routine TVOC analysis?
No—factory-calibrated with certified multi-component VOC gas standards traceable to NIST SRM 1861; field verification uses single-point benzene/toluene check standards every 24 h.
Can the system be upgraded to support mass spectrometric detection?
Not natively—the SP7800 is a fixed-FID platform. JKRDA offers the SP7900 series for GC-MS coupling, with shared sample introduction and data infrastructure.
What maintenance intervals are recommended for the thermal desorption unit?
Desorption tube holder cleaning every 200 runs; cold trap replacement every 12 months or 1,000 analyses; FID jet inspection quarterly.
Is remote monitoring supported?
Yes—via secure VPN-enabled ChromaLink™ Web Console, allowing real-time status viewing, alarm notifications, and method queue management from off-site locations.
Does the system meet Chinese regulatory requirements for indoor air testing?
Yes—it is type-approved under CNAS accreditation scope for GB/T 18883–2022 and CJJ/T 139–2010, with documented metrological traceability to BAM (Germany) and NIM (China).
