Sida GS-1 Automated Gas Sampler for Gas Chromatography
| Brand | Sida |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | GS-1 |
| Price Range | USD 1,400 – 2,800 (FOB Shanghai) |
| Instrument Type | Gas Chromatography Autosampler |
| Configuration Options | Single-Channel (GS-1) or Dual-Channel (GS-2) |
| Heating Option | Optional heated or ambient-temperature operation |
| Sample Loop | Customizable volume (standard range: 0.1–5 mL) |
Overview
The Sida GS-1 Automated Gas Sampler is a precision-engineered front-end sampling interface designed specifically for integration with gas chromatography (GC) systems. It operates on the principle of loop-based gas sampling—where a fixed or user-defined volume of gaseous sample is captured in a stainless-steel or fused-silica quantitative loop under controlled pressure and flow conditions, then rapidly transferred to the GC injector via pneumatic actuation. This method ensures high reproducibility, minimal carryover (<0.1%), and compatibility with both split and splitless injection modes. The GS-1 eliminates manual syringe injection variability, enabling unattended analysis of up to 48 discrete gas samples per sequence when paired with compatible sample vials or gas-tight cylinders. Its modular architecture supports seamless synchronization with GC system start triggers via TTL or RS-232 signals, conforming to standard laboratory automation protocols.
Key Features
- Single-channel configuration (GS-1 model) optimized for routine gas-phase analysis with low maintenance overhead
- Optional integrated heating module (ambient to 200 °C, ±1 °C stability) prevents condensation of volatile organic compounds (VOCs) or moisture-sensitive analytes during transfer
- Customizable quantitative loop volumes—from 0.1 mL for trace-level calibration standards to 5 mL for low-concentration environmental air monitoring
- Pneumatically actuated 6-port or 10-port valve manifold with electropolished internal surfaces to minimize adsorption and ensure inert sample path integrity
- Robust firmware supporting programmable dwell time, loop fill pressure (0–150 psi), purge cycles, and multi-step injection sequences
- Front-panel LCD interface with real-time status feedback and error logging; also controllable via ASCII command set over RS-232
Sample Compatibility & Compliance
The GS-1 accommodates a wide range of gaseous matrices including ambient air, stack emissions, biogas, natural gas, headspace vapors, and synthetic calibration mixtures. It maintains compatibility with common GC carrier gases (He, H2, N2) and supports pressure-balanced sampling for variable cylinder pressures (1–10 bar). All wetted materials—including loop tubing, valve rotors, and seals—are selected for chemical resistance (e.g., PTFE, Kalrez®, 316 stainless steel) and certified non-leaching per ASTM D6866 and ISO 17025 traceability requirements. The device meets CE marking directives for electromagnetic compatibility (2014/30/EU) and low-voltage safety (2014/35/EU). When operated in regulated environments (e.g., environmental testing labs compliant with EPA Method TO-15 or ISO 16017-1), audit trails and parameter lockout functions support GLP/GMP documentation needs.
Software & Data Management
The GS-1 operates autonomously but integrates natively with major GC data systems—including Thermo Chromeleon, Agilent OpenLab CDS, and Shimadzu GC Solutions—via standardized instrument control drivers (ICD). Optional Sida GC-Link software provides extended sequence scheduling, real-time loop pressure monitoring, and CSV-exportable run logs with timestamps, loop ID, and operator annotations. All method parameters are stored in non-volatile memory with write-protection options. For laboratories subject to FDA 21 CFR Part 11 compliance, the optional Audit Trail Module records all parameter changes, user logins, and execution events with digital signature support and immutable timestamping.
Applications
- Environmental monitoring: Quantification of BTEX, halocarbons, and greenhouse gases (CO2, CH4, N2O) in ambient air per EPA Method TO-14A/TO-15
- Industrial hygiene: Workplace exposure assessment of solvent vapors (e.g., acetone, xylene, MEK) using OSHA ID-255 or NIOSH 1501 protocols
- Energy sector: Compositional analysis of natural gas, LNG boil-off gas, and biogas upgrading streams per ISO 6974 series
- Pharmaceutical manufacturing: Residual solvent testing in active pharmaceutical ingredients (APIs) per USP and ICH Q3C guidelines
- Research laboratories: High-throughput screening of catalytic reaction effluents or microbial fermentation headspaces
FAQ
What gas cylinder connection types does the GS-1 support?
Standard CGA-170 (for nitrogen, argon) and CGA-320 (for hydrogen) fittings are provided; custom adapters available upon request.
Can the GS-1 be used with cryogenically trapped samples?
Yes—when configured with the optional heated transfer line (up to 200 °C), it interfaces with cryo-focused GC injectors without thermal shock or analyte loss.
Is method validation documentation included?
Yes—each unit ships with a Factory Acceptance Test (FAT) report, loop volume certification certificate, and ISO/IEC 17025-accredited calibration data for pressure and temperature sensors.
How is carryover minimized between injections?
Three-stage purging (carrier gas flush + vacuum evacuation + backflush) is programmable per sample; validated carryover remains below 0.1% for C2–C6 hydrocarbons at 10 ppm level.
Does the GS-1 support remote diagnostics?
Via optional Ethernet module (RS-232-to-Ethernet bridge), enabling SNMP-based health monitoring and firmware updates through enterprise network infrastructure.
