Annuo AS-3117 Multifunctional Autosampler for Gas Chromatography

Overview

The Annuo AS-3117 Multifunctional Autosampler is an engineered solution for high-throughput, precision liquid-phase sample introduction in gas chromatography (GC) laboratories. Designed around a dual-inlet turret architecture, it enables simultaneous, independent operation at two GC injection ports without physical port occupation—eliminating the need for hardware duplication or sequential queuing. Its core mechanism employs closed-loop encoder feedback for real-time positional verification, ensuring repeatable syringe positioning and minimizing cumulative mechanical drift over extended unattended runs. The system utilizes a buffered plunger drive to reduce dead volume during needle penetration and sample transfer, directly supporting trace-level analysis where carryover and residual volume are critical performance constraints. Built for integration into regulated environments, the AS-3117 supports deterministic timing control (±10 ms resolution), programmable dwell times (0.0–120.0 s pre- and post-injection), and viscosity-delay compensation (0.0–60.0 s) to accommodate diverse solvent matrices—from low-viscosity hexane to high-boiling glycerol derivatives.

Key Features

• Dual-injection-port capability with zero port occupancy: One AS-3117 unit services two GC inlets concurrently via independent turret indexing and syringe actuation paths.
• Modular sample handling: Standard configuration includes a primary 156-position 2 mL vial tray and a secondary 15-position auxiliary tray—expandable to 20 positions via software-defined mapping.
• Sub-microliter precision: Achieves 0.01 µL minimum injection volume using selectable syringes (1–500 µL) and calibrated quantitative loops (standard 10 µL, configurable).
• Encoder-guided motion control: Absolute position calculation across all axes (turret rotation, syringe vertical actuation, needle wash station alignment) eliminates step-loss errors common in open-loop stepper systems.
• Multi-stage internal needle rinse: Solvent delivery path includes dedicated inner-lumen flush cycles with programmable rinse frequency (1–99 passes) and solvent selection (up to 2 solvent reservoirs).
• Full bidirectional communication: Native Modbus RTU protocol support enables seamless integration with LIMS, ELN, and third-party SCADA platforms; optional TTL/relay trigger inputs allow hardware-synchronized start/stop.
• Intuitive local HMI: 5-inch capacitive touchscreen interface with guided workflow prompts, real-time status visualization, and on-device method storage (up to 20 methods).
• Robust environmental tolerance: Rated for continuous operation between −20 °C and 50 °C at 10–90% RH, supporting deployment in non-climate-controlled QC labs or mobile analytical units.

Sample Compatibility & Compliance

The AS-3117 accommodates standard 12 × 32 mm screw-thread or crimp-top 2 mL vials (including ASTM D4718-compliant formats), as well as custom vial geometries via adjustable tray fixtures. It supports aqueous, organic, and mildly corrosive solvents (e.g., acetonitrile, methanol, chloroform) when used with chemically resistant PTFE/sapphire syringe components. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, the system provides audit-ready functionality—including timestamped method logs, user-accessible error codes, input validation checks, and full parameter traceability—enabling laboratories to implement compliant workflows under GLP or GMP frameworks. All firmware updates and method archives are stored locally with SHA-256 checksum integrity verification.

Software & Data Management

The included Windows-based PC control software delivers complete instrument reverse control: users configure sequences, define calibration curves, monitor real-time syringe pressure profiles, and export raw injection logs (CSV/TSV) with metadata (vial ID, timestamp, volume, rinse count, error flags). The software supports method import/export in XML format, batch editing of sequence tables, and automated report generation aligned with internal QA templates. For enterprise integration, the Modbus TCP/IP gateway option enables direct connection to LabWare LIMS or Thermo Fisher Chromeleon via standard Ethernet—without proprietary drivers. Audit trail records include operator ID, parameter changes, and execution timestamps, satisfying basic ALCOA+ data integrity requirements.

Applications

• Environmental testing: EPA Method 502.2 and 8021B compliance for volatile organic compound (VOC) analysis in water and soil extracts.
• Pharmaceutical QC: Residual solvent testing per USP , including Class 1–3 solvents in active pharmaceutical ingredients (APIs).
• Petrochemical analysis: Simulated distillation (ASTM D2887) and hydrocarbon group-type analysis (ASTM D5186) requiring high repeatability across 100+ sample batches.
• Food safety screening: Pesticide residue quantification (AOAC 2007.01) with multi-level calibration and internal standard correction.
• Academic research: Method development for heart-cutting 2D-GC and large-volume injection (LVI) protocols requiring precise dwell and delay timing.

FAQ

Can the AS-3117 interface with Agilent, Shimadzu, and Thermo GC systems?
Yes—via configurable TTL/relay triggers and Modbus-compatible digital I/O, enabling hardware synchronization with all major GC manufacturers’ external start signals.
Is the 156-position tray compatible with 1.5 mL vials?
Yes—the tray accepts both 1.5 mL and 2 mL standard crimp/screw vials without adapter inserts.
Does the system support splitless injection timing control?
Yes—pre-injection dwell time, needle insertion speed, and post-injection purge delay are independently programmable to optimize splitless transfer efficiency.
What maintenance intervals are recommended for the syringe and wash station?
Syringe lubrication and O-ring inspection every 5,000 injections; internal needle rinse channel cleaning every 200 runs using 10% phosphoric acid followed by isopropanol flush.
Can method parameters be locked to prevent unauthorized modification?
Yes—password-protected administrator mode restricts access to calibration constants, I/O configuration, and firmware update functions.