Agilent 7693A 16-Position Autosampler (G4513A)

Overview

The Agilent 7693A 16-Position Autosampler (G4513A) is a high-precision, modular liquid handling system engineered for integration with Agilent gas chromatography (GC) platforms. It operates on a dual-tower syringe actuation principle—enabling simultaneous vial access and needle wash—thereby reducing cycle time and enhancing throughput reproducibility. Unlike legacy autosamplers, the 7693A embeds core sample preparation functions directly into the autosampling workflow, including programmable dilution, internal standard spiking, thermal conditioning of samples, and controlled solvent addition. This architecture eliminates manual intervention in routine pre-injection steps, significantly improving inter-operator consistency and minimizing pipetting-related variability. Its modular mechanical design allows field-upgradable expansion—from the base 16-vial configuration to configurations supporting up to 150 × 2-mL vials—making it suitable for both small-scale method development labs and high-throughput QC environments requiring extended unattended operation.

Key Features

• Dual-tower sampling mechanism enabling concurrent vial access and needle cleaning—reducing carryover risk and shortening cycle time by up to 30% compared to single-tower predecessors.
• Programmable sample preparation suite: automated serial dilution (1:2 to 1:1000), internal standard addition (volume- or concentration-based), vortex mixing (0–30 s), and precise solvent delivery (±0.5 µL accuracy at 10 µL).
• Thermally regulated sample tray with independent heating capability (ambient to +150 °C) and optional cooling (down to –10 °C with external chiller)—critical for volatile analyte stabilization and viscosity-controlled injections.
• Three syringe options supported: 100-µL (standard for GC applications), 250-µL and 500-µL (for viscous or low-concentration matrices), all compatible with the Enhanced Sample Handling (ESH) needle holder for improved durability and positional repeatability.
• OpenLab CDS integration: full bidirectional control via Agilent’s enterprise chromatography data system, including method synchronization, audit trail logging, and electronic signature enforcement compliant with FDA 21 CFR Part 11 requirements.

Sample Compatibility & Compliance

The 7693A accommodates standard 2-mL screw-thread or crimp-top vials (11 mm or 12 mm diameter), as well as 1.5-mL conical inserts. It supports aqueous, organic, and moderately corrosive solvents—including acetonitrile, methanol, chloroform, and dilute acids/bases—when used with appropriate syringe materials (e.g., stainless steel with PTFE plunger seal). The system conforms to ISO/IEC 17025:2017 general requirements for testing laboratories and supports traceable calibration procedures per ASTM D4057 (standard practice for manual sampling of petroleum and petroleum products). When deployed within validated workflows, it meets instrument qualification criteria outlined in USP Analytical Instrument Qualification and supports IQ/OQ/PQ documentation templates aligned with GxP regulatory expectations.

Software & Data Management

Control and method development are performed through Agilent Easy SamplePrep—a dedicated software module that runs natively within OpenLab CDS. Users define multi-step sample preparation sequences using drag-and-drop logic blocks (e.g., “Add 50 µL IS,” “Dilute 1:10 with MeOH,” “Heat to 60 °C for 2 min”). Each step is timestamped and logged with parameter values, syringe position, and error status. All actions generate immutable records stored in the CDS database, supporting full electronic record integrity under 21 CFR Part 11. Audit trails include operator ID, timestamp, action type (create/edit/execute), and before/after parameter values—enabling retrospective review during internal audits or regulatory inspections.

Applications

• Environmental analysis: automated dilution and spiking of EPA Method 8260/8270 extracts prior to GC-MS analysis.
• Pharmaceutical QC: consistent internal standard addition and thermal equilibration of residual solvent samples per ICH Q2(R2) guidelines.
• Petrochemical testing: high-precision injection of viscous distillates using 500-µL syringes with heated needle path to prevent crystallization.
• Food safety screening: parallel preparation of pesticide residue extracts with matrix-matched calibration and auto-dilution to extend linear dynamic range.
• Academic research: reproducible method development for novel derivatization protocols requiring timed reagent addition and thermal activation.

FAQ

Is this unit refurbished or used—and what does that mean for warranty and performance?
This is a pre-owned Agilent 7693A autosampler, fully inspected, functionally tested, and calibrated to original equipment specifications. It includes a 12-month limited hardware warranty covering defects in materials and workmanship.
Can the 7693A be retrofitted onto older Agilent GC systems such as the 6890 or 7890 series?
Yes—the 7693A is backward-compatible with Agilent GC models released after 2005, provided the GC firmware is updated to version A.03.05 or later and the appropriate interface cable (G1530-60701) is installed.
Does the system support third-party CDS platforms like Chromeleon or Empower?
Native control is limited to Agilent OpenLab CDS. While basic injection triggering may be possible via RS-232 or LAN commands, full sample preparation sequence execution and audit-compliant data capture require Agilent’s native software stack.
What maintenance is required to sustain long-term reliability?
Routine maintenance includes quarterly syringe lubrication, monthly needle seat inspection, biannual wash solvent filter replacement, and annual calibration verification using certified reference standards traceable to NIST.
Is the Enhanced Sample Handling (ESH) module included in this configuration?
The base configuration includes the 100-µL syringe and standard needle holder. ESH components (250/500-µL syringes, reinforced needle guide, and high-torque drive assembly) are available as optional add-ons and must be specified at time of order.