Varian Archon 5100A Purge-and-Trap Autosampler for Water and Soil Analysis

Overview

The Varian Archon 5100A Purge-and-Trap Autosampler is a robust, field-proven sample introduction system engineered for automated volatile organic compound (VOC) analysis in environmental laboratories. It operates on the principle of dynamic headspace extraction: inert gas purges VOCs from aqueous or solid-phase (soil, sediment, sludge) samples into a sorbent trap, followed by thermal desorption directly into a gas chromatograph (GC) or GC–mass spectrometer (GC–MS). Designed and manufactured in the United States, the Archon 5100A integrates seamlessly with Varian Saturn® and CP-3800 GC platforms, as well as third-party GC systems via standard analog/digital I/O and RS-232 control protocols. Its architecture supports full method automation—including purge time, bake temperature, desorption ramp, and trap cooling—enabling reproducible, low-level detection (sub-pptr range) required for regulatory compliance testing.

Key Features

• Multi-matrix capability: Fully programmable protocols for water, soil, and sediment matrices using EPA-compliant spiking, acidification, and salt addition steps
• Dual-mode trap configuration: Supports both single- and dual-sorbent traps (e.g., Tenax®/Carbotrap™/Carbosieve™ combinations) with automatic trap selection and conditioning cycles
• Integrated sample agitation: Programmable magnetic stirring during purge phase to enhance mass transfer from heterogeneous solids
• Leak-tight fluidic path: All wetted components constructed from inert, low-outgassing materials (e.g., PFA, fused silica, electropolished stainless steel) to minimize memory effects and background contamination
• Real-time diagnostics: Built-in pressure transducers, temperature sensors, and flow controllers provide continuous monitoring of purge gas flow (0–100 mL/min), trap temperature (−30 °C to 350 °C), and desorption efficiency
• Modular design: Easy access to valves, traps, and transfer lines facilitates routine maintenance and GLP-compliant cleaning validation

Sample Compatibility & Compliance

The Archon 5100A accommodates standard 40-mL VOC vials (with septa) and 10–40 g soil/sediment samples in 40-mL amber glass vials with Teflon-lined caps. It meets the mechanical and operational requirements of U.S. EPA Methods 502.2 (purgeable halocarbons), 524.2 (purgeable aromatics and halocarbons), 624 (VOCs in water), and 8260D (VOCs in solid waste). When operated within validated methods and paired with appropriate GC–MS instrumentation, the system supports data integrity frameworks aligned with 21 CFR Part 11 for electronic records and signatures. All refurbished units undergo full functional verification against ASTM D3694 Annex A1 (Standard Practice for Determining Volatile Organic Compounds in Water by Purge-and-Trap Capillary Column Gas Chromatography), including blank assessment, calibration verification, and recovery testing across matrix types.

Software & Data Management

The Archon 5100A interfaces natively with Varian Star™ CDS (v6.x and later) for synchronized method execution, event logging, and audit-trail generation. Method parameters—including purge duration, desorption hold time, cryofocusing settings, and valve sequencing—are stored in encrypted method files with user-access controls. Raw instrument logs (pressure traces, temperature profiles, valve actuation timestamps) are archived alongside chromatographic data, enabling full traceability for internal audits or regulatory inspections. The system supports export of metadata in .csv and .xml formats compatible with LIMS integration, and all calibration and maintenance records are retained in accordance with ISO/IEC 17025 documentation requirements.

Applications

• Regulatory environmental monitoring: Drinking water, wastewater, groundwater, and surface water VOC profiling per Safe Drinking Water Act (SDWA) and Clean Water Act (CWA)
• Hazardous waste characterization: Soil and sediment screening at Superfund sites under RCRA and TSCA mandates
• Method development and validation: Optimization of purge parameters for emerging contaminants (e.g., 1,4-dioxane, chlorinated solvents, fuel oxygenates)
• Quality assurance in pharmaceutical manufacturing: Residual solvent analysis in excipients and final drug products (aligned with ICH Q3C guidelines)
• Academic and contract research: High-throughput VOC screening in ecotoxicology and bioremediation studies

FAQ

Is this unit fully refurbished and calibrated prior to shipment?
Yes. Each Archon 5100A undergoes comprehensive refurbishment: trap replacement, valve manifold cleaning, leak testing per ASTM D3694, and multi-point calibration verification using certified VOC standards in water and soil matrices.
Does it include software licenses or only hardware?
Hardware-only delivery is standard. Star™ CDS licenses must be procured separately from Agilent (successor to Varian’s chromatography business); however, legacy license keys and installation media are available upon request for qualified users.
Can it be integrated with non-Varian GC systems?
Yes. The unit provides TTL, RS-232, and analog voltage outputs for synchronization with Thermo Fisher, Shimadzu, PerkinElmer, and Agilent GC platforms using custom or vendor-supplied interface modules.
What documentation accompanies the instrument?
You receive a Certificate of Refurbishment, full service history log, calibration report, EPA method validation summary, and electronic copies of the original Varian Archon 5100A Operation Manual and Troubleshooting Guide.
Is remote support available post-installation?
Yes. Technical assistance—including method optimization, troubleshooting, and preventive maintenance guidance—is provided via secure remote desktop sessions or phone consultation for the duration of the 6-month warranty period.