APL APL-AGS-36 Multifunctional Gas Bag Autosampler for GC Analysis
| Brand | APL |
|---|---|
| Origin | Sichuan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | APL-AGS-36 |
| Instrument Type | Gas Chromatography Autosampler |
| Max Sample Capacity | 132 positions |
| Minimum Injection Volume | 1 mL |
| Quantitative Loop Volume | 1 mL |
| Sample Tray Configuration | 36-position base (expandable in 12-position modules) |
| Compatible Sampling Devices | Gas-tight syringes and Tedlar®/aluminized gas bags |
| Tubing Material | PTFE |
| Valve Body | PEEK |
| Valve Core | Polyimide (PI) |
| Carrier Gas Line Purge Flow Rate | Up to 0.5 L/min |
| Injection Precision | R² ≥ 0.9999 for total hydrocarbons and methane peak areas across five replicate injections |
| Dimensions (L×W×H) | 450 × 500 × 430 mm |
Overview
The APL APL-AGS-36 Multifunctional Gas Bag Autosampler is an engineered solution for automated, trace-level analysis of non-methane total hydrocarbons (NMTHC) in ambient air, stack emissions, and industrial process gases. Designed specifically for integration with gas chromatographic systems—particularly dual-FID or FID/MS configurations—the instrument implements a fixed-loop, pressure-balanced injection methodology compliant with EPA Method TO-15, ASTM D6420, and ISO 16017-1. It eliminates manual gas handling by automating loop filling, carrier gas purging, bag rinsing, and precise quantitative transfer into the GC inlet. Its architecture supports both dynamic headspace sampling and static gas-phase injection, enabling reproducible quantification of C2–C12 hydrocarbons without catalytic methanation or pre-concentration traps.
Key Features
- Modular 36-position base tray expandable to 132 positions via optional 12-position add-on modules—enabling high-throughput unattended operation for regulatory monitoring campaigns.
- Dual-position optical sensing system ensures repeatable valve actuation and accurate loop-to-injector alignment, minimizing carryover and positional drift.
- PTFE-lined fluidic path throughout—including sample lines, quantitative loop, and purge manifolds—meets national standards for inertness in volatile organic compound (VOC) analysis (e.g., HJ 638–2012, GB/T 15263–2009).
- PEEK-bodied, polyimide-cored switching valves rated for >500,000 cycles under continuous GC carrier gas pressure (up to 150 psi), delivering long-term mechanical stability and low dead-volume switching.
- Integrated gas bag conditioning protocol: automatic three-cycle rinse with zero air prior to sampling, reducing memory effects from previous high-concentration samples.
- Universal GC interface: heated transfer line compatible with Agilent, Thermo Fisher, Shimadzu, and PerkinElmer GC inlets without hardware modification—supports both split/splitless and direct cold-on-column injection modes.
- 7-inch capacitive touchscreen with intuitive icon-driven workflow navigation; firmware supports user-defined method templates, audit trail logging, and password-protected parameter locking.
Sample Compatibility & Compliance
The APL-AGS-36 accommodates standard 0.5–6 L Tedlar®, FlexFoil®, or aluminized gas bags as well as 1–10 mL gas-tight glass syringes. Each sampling port supports real-time switching between bag and syringe modes without tooling. The system complies with GLP data integrity requirements through timestamped event logging, operator ID tracking, and method version control. It supports 21 CFR Part 11–compliant electronic signatures when paired with validated LIMS or chromatography data systems (CDS). All gas pathways meet ISO 8573-1 Class 1 purity specifications for hydrocarbon-free compressed air supply.
Software & Data Management
Instrument control is managed via embedded Linux-based firmware with Ethernet and RS-232 connectivity. The APL-GCLink software suite (v3.2+) provides method scheduling, calibration curve management, QC flagging (e.g., retention time shift >0.05 min, peak area CV >3%), and automatic report generation in PDF/XLSX formats. Raw GC trigger signals are synchronized via TTL pulse output; status feedback (valve position, loop pressurization, bag vacuum level) is logged at 10 Hz resolution for forensic troubleshooting. Audit trails retain all parameter changes, run start/stop events, and error codes for minimum 18 months.
Applications
- Regulatory NMTHC monitoring per China’s HJ 38–2017 and US EPA Method 25A for landfill, wastewater treatment, and petrochemical facility compliance reporting.
- Source apportionment studies requiring parallel analysis of >100 ambient air samples collected across urban, rural, and industrial zones.
- Method validation support for laboratory accreditation (CNAS, ILAC) including precision testing (within-lab repeatability, intermediate precision), limit of detection (LOD) verification, and matrix spike recovery assessment.
- Process gas QC in semiconductor fab cleanrooms where ppb-level hydrocarbon contamination must be tracked against SEMI F21 specifications.
- Calibration gas delivery for multi-point GC response factor determination using certified NMTHC standards (NIST-traceable).
FAQ
Does the APL-AGS-36 require external gas regulators or vacuum pumps?
No—it integrates an onboard diaphragm pump and proportional pressure controller capable of generating stable 0–100 kPa vacuum and 0–150 psi positive pressure for loop charging and bag evacuation.
Can the quantitative loop volume be changed in-field without tools?
Yes—three standardized loop options (1 mL, 2 mL, 3 mL) are swappable via quick-connect fittings; loop replacement requires <90 seconds and no recalibration.
Is remote diagnostics supported?
Yes—SSH-enabled firmware access allows secure remote log review, firmware updates, and configuration backup/restore via encrypted SFTP.
What maintenance intervals are recommended for routine operation?
Valve core inspection every 6 months; PTFE tubing replacement annually or after 5,000 injections; full system performance verification quarterly per ISO/IEC 17025 Clause 6.4.6.
How does the system handle humid or particulate-laden samples?
An optional integrated Nafion™ dryer and 0.5 µm inline particulate filter can be installed upstream of the loop to prevent condensation and particulate accumulation in critical flow paths.
