Agilent 7820A Used Gas Chromatograph

Overview

The Agilent 7820A Used Gas Chromatograph is a robust, entry-level benchtop GC system engineered for routine analytical laboratories requiring high reliability, regulatory-compliant operation, and consistent separation performance. Built on Agilent’s proven gas chromatography architecture, the 7820A employs fully electronic pressure control (EPC) across all inlets and detectors—eliminating mechanical flow controllers and delivering superior retention time stability (< 0.06% RSD) and peak area precision (< 2% RSD). Its column oven supports rapid heating (up to 75 °C/min), precise temperature programming (5 ramp stages, 999.99 min maximum run time), and exceptional thermal uniformity (< 0.01 °C drift per 1 °C ambient fluctuation). Designed for continuous operation in QA/QC, environmental testing, petrochemical screening, and pharmaceutical impurity profiling, the system meets foundational requirements for GLP- and GMP-aligned workflows when configured with audit-trail-capable software and documented calibration history.

Key Features

• Full EPC architecture for inlet and detector gas control—enabling reproducible method transfer and automated method optimization
• Thermally stable column oven with 8–425 °C operating range, 1 °C setpoint resolution, and < 0.01 °C thermal drift per degree ambient variation
• Dual independent heated zones for inlets and detectors (5 total heated zones, including auxiliary), each controllable to 350–425 °C depending on module
• Front-panel LCD interface with intuitive navigation—displays real-time sequence status, instrument health metrics, and error diagnostics without PC dependency
• Support for two simultaneous inlets: configurable as split/splitless (S/SL) for capillary columns or purged packed-column (PP) for legacy or specialized applications
• Simultaneous dual-detector capability with EPC-controlled FID, TCD, ECD (where permitted), or NPD—each with dedicated flow/pressure tuning and optimized MDL performance
• Integrated LAN and analog output (1 mV/1 V/10 V) for seamless integration into LIMS or SCADA environments; remote start/stop functionality via network command

Sample Compatibility & Compliance

The Agilent 7820A accommodates a broad spectrum of volatile and semi-volatile analytes—from hydrocarbons and residual solvents to pesticides, fatty acid methyl esters (FAMEs), and environmental contaminants. Its S/SL inlet supports standard 0.1–0.53 mm ID capillary columns (including wide-bore), while the PP inlet accepts 1/4″ and 1/8″ packed columns and 0.53 mm ID capillaries. All detection modules comply with international safety and electromagnetic compatibility standards: UL 61010, CSA C22.2 No. 61010, IEC 61010, EN 61010, CISPR 11/EN 55011 Class A, and IEC/EN 61326. The instrument is manufactured under ISO 9001 quality management systems, and full certification documentation—including factory service records and post-reconditioning verification reports—is provided with each unit. For regulated environments, the system can be validated per ASTM D3606, USP , or EPA Methods 8021B/8270D when paired with appropriate software and operational protocols.

Software & Data Management

The 7820A operates natively with Agilent EZChrom Elite Compact—a validated, Windows-based chromatography data system (CDS) supporting method development, acquisition, reporting, and basic compliance features. While not FDA 21 CFR Part 11–certified out-of-the-box, the platform supports user authentication, electronic signatures (when deployed with domain-level security policies), and audit-trail generation for critical events (e.g., method edits, sequence starts, calibration updates). Raw data are stored in vendor-neutral formats (.D format, compatible with OpenLab CDS migration tools), and export options include CSV, PDF, and XML for LIMS ingestion. Optional upgrades to OpenLab CDS Basic or Enterprise editions enable full 21 CFR Part 11 compliance, including role-based access control, electronic signature workflows, and immutable audit trails—essential for pharmaceutical QC labs undergoing FDA or EMA inspections.

Applications

This reconditioned Agilent 7820A is routinely deployed in accredited contract laboratories for residual solvent analysis (ICH Q3C), gasoline hydrocarbon profiling (ASTM D1319), pesticide residue screening (AOAC 2007.01), and environmental VOC quantification (EPA TO-17). Its FID delivers sub-3 pg C/s sensitivity for trace hydrocarbon detection in polymer extracts; the TCD enables universal detection of permanent gases and light volatiles; the NPD provides selective, low-pg nitrogen/phosphorus detection for alkaloid or organophosphate analysis; and the ECD (where legally deployable) achieves sub-0.02 pg/mL detection limits for chlorinated pesticides such as lindane and DDT. With its 16-position autosampler (G4513A), the system supports unattended overnight analysis—reducing manual intervention and improving throughput consistency across multi-sample batches.

FAQ

Is this a factory-refurbished unit or dealer-reconditioned?
All units undergo comprehensive technical reconditioning by Agilent-authorized service partners—including leak testing, EPC calibration verification, detector sensitivity validation, oven thermal mapping, and firmware update to the latest stable release.
What documentation accompanies the instrument?
Each system ships with a full service history log, post-reconditioning performance report (including retention time and area RSD data), ISO 9001 certificate copy, electrical safety test record, and original Agilent operator manuals in English.
Can this GC be integrated into a 21 CFR Part 11–compliant workflow?
Yes—when paired with OpenLab CDS Enterprise and configured with domain authentication, electronic signatures, and audit-trail archiving, the system satisfies key elements of FDA Part 11 requirements for electronic records and signatures.
What maintenance support is available after purchase?
We provide 12 months of hardware warranty and remote technical assistance; extended service plans—including on-site preventive maintenance, detector rebuilds, and EPC recalibration—are available through our global Agilent-certified field service network.
Are consumables and spare parts included?
No—columns, septa, liners, ferrules, and detector components are sold separately; however, we maintain an inventory of genuine Agilent consumables with same-day shipping from EU and US distribution hubs.