Raykol Auto GS 30 Gas Autosampler

Overview

The Raykol Auto GS 30 Gas Autosampler is an engineered solution for automated, high-integrity gas-phase sample introduction into gas chromatography (GC) systems. Designed specifically for volatile organic compound (VOC) analysis in environmental and industrial gas matrices, it operates on a controlled vacuum-driven sampling principle: a calibrated vacuum pump draws gaseous samples from Tedlar® bags or gas-tight syringes into a thermally stabilized, inert quantitative loop (1 mL). Subsequent valve sequencing transfers the precisely metered sample volume onto the GC column under reproducible pressure and temperature conditions. This architecture eliminates manual injection variability—such as inconsistent draw speed, dwell time, or needle positioning—that directly impacts retention time stability, peak shape fidelity, and quantitative precision. The Auto GS 30 is not a generic liquid-phase autosampler adapted for gases; it is purpose-built for gaseous analytes, featuring full-system inertness, thermal management, and vacuum-based volumetric delivery—core requirements for trace-level VOC quantification per EPA Method TO-14A, ISO 16017-1, and ASTM D6196.

Key Features

• Vacuum-Driven Volumetric Sampling: Uses a high-stability vacuum pump to extract gas samples at defined flow rates, ensuring consistent loop filling independent of bag elasticity or syringe plunger resistance.
• Bidirectional Pneumatic Purge System: Integrated forward and reverse gas flush cycles clean both common transport lines and critical interface points—including 1/4″ Swagelok® fittings—using adjustable pressure (0–100 kPa) and programmable duration (0.1–30 s) to minimize carryover between samples.
• Thermally Controlled Flow Path: Entire sample pathway—from inlet fitting to quantitative loop to transfer line—is heated from ambient to 130 °C with ±0.5 °C uniformity, preventing condensation of semi-volatile organics (e.g., C₈–C₁₂ aldehydes, PAHs) and ensuring quantitative transfer.
• High-Precision Positioning & Repeatability: Stepper-motor-driven carousel achieves ±0.3° angular accuracy across all 30 positions; RSD for total hydrocarbon analysis (2 mg/L standard) is <1% intra-channel and <2% inter-channel (n = 6), validated per ISO 5725-2.
• Dual-Loop Optional Configuration: Supports simultaneous dual-loop operation for parallel analysis—enabling concurrent methane/non-methane hydrocarbon (NMHC) determination on FID and PID detectors without hardware reconfiguration.

Sample Compatibility & Compliance

The Auto GS 30 accepts standard gas sampling media including 1 L, 2 L, and 3 L Tedlar®, FlexFoil®, and ALTEF® bags, as well as 50 mL and 100 mL gas-tight glass syringes. Manual compression-seal interfaces ensure leak-tight coupling without proprietary adapters. All wetted surfaces are constructed from electropolished 316 stainless steel; optional SilcoNert® or Sulfinert® deactivation is available for ultra-trace sulfur compound analysis. The system complies with key regulatory frameworks for environmental testing: its vacuum calibration traceability aligns with ISO/IEC 17025 requirements, and software audit trails meet FDA 21 CFR Part 11 data integrity criteria when operated with compliant GC control software. It supports GLP-compliant workflows through method locking, electronic signature enforcement, and immutable run logs.

Software & Data Management

The Windows-based Raykol GasControl™ software provides intuitive graphical sequence programming, real-time status monitoring, and integrated GC trigger synchronization via TTL or Ethernet (TCP/IP). Users define per-sample parameters—including loop fill time, purge cycles, oven hold time, and replicate count—within a tabular method editor. All acquisition metadata (sample ID, operator, timestamp, instrument conditions) is embedded in raw data files (CSV and native .raykol formats) and exportable to LIMS via ODBC. Software validation documentation (IQ/OQ protocols) is provided, and the system supports secure user role management (admin, analyst, reviewer) with password policies and session timeout.

Applications

• Environmental ambient air monitoring (EPA TO-14A, TO-15)
• Industrial stack emission testing (e.g., refinery flare gas, wastewater treatment off-gas)
• Workplace exposure assessment (NIOSH 1501, OSHA 1005)
• Petrochemical process gas QC (hydrocarbon composition, H₂S, mercaptans)
• Indoor air quality (IAQ) surveys targeting formaldehyde, benzene, and chlorinated solvents

FAQ

Does the Auto GS 30 support unattended overnight operation?
Yes—equipped with watchdog timers, automatic error recovery, and hardware interlocks, it supports fully unattended batch runs of up to 30 samples with configurable pause intervals.
Can it be integrated with third-party GC systems (e.g., Agilent, Thermo, Shimadzu)?
Yes—via standard TTL trigger inputs/outputs and RS-232/Ethernet communication protocols; driver packages are available for OpenLab CDS, Chromeleon, and GCMSsolution.
Is quantitative loop volume calibration traceable to NIST standards?
Yes—each unit ships with a certified calibration certificate referencing NIST SRM 1640a (gas density standard) and includes on-board verification routines using certified permeation tubes.
What maintenance intervals are recommended for the vacuum pump and valves?
Vacuum pump oil replacement every 6 months (or 2,000 operating hours); valve lifetime exceeds 500,000 actuations per port, verified per ISO 5211 testing protocols.
Is remote diagnostics supported?
Yes—optional Raykol Remote Assist module enables encrypted screen sharing and firmware update capability via TLS 1.2-secured connection.