EPA Method 608 Instrumentation Guide

EPA Method 608 is a U.S. EPA-approved analytical procedure used for the detection of organochlorine pesticides and polychlorinated biphenyls (PCBs) in municipal and industrial wastewater. The method is part of the Clean Water Act testing program and is widely used by environmental laboratories for regulatory compliance. It relies on gas chromatography with electron capture detection (GC-ECD) to achieve low-level detection of halogenated compounds known for their persistence and toxicity in the environment.

A photo of a refurbished AGILENT GC system for EPA METHOD 608 that links to a catalog of gas chromatography equipment.

To comply with Method 608, laboratories must use gas chromatographs equipped with an Electron Capture Detector, which provides exceptional selectivity and sensitivity for chlorinated analytes. Sample preparation involves liquid-liquid extraction with methylene chloride, concentration using a Kuderna-Danish or rotary evaporator, and final analysis via GC-ECD. Optional cleanup steps may include Florisil column purification and sulfur removal. Below, we highlight the best GC-ECD systems from top manufacturers that meet the stringent analytical performance criteria of EPA Method 608.

Please click here to learn more about Method 608.

Agilent 7890B GC with Electron Capture Detector for EPA Method 608

The Agilent 7890B GC configured with an Electron Capture Detector (ECD) is one of the most widely used systems for EPA Method 608 applications. Its precise electronic pneumatics control and excellent temperature programming capabilities ensure consistent retention times and peak resolution. The ECD module delivers exceptional sensitivity for halogenated compounds such as PCBs and organochlorine pesticides, supporting accurate quantification at trace levels suitable for Clean Water Act compliance programs.

This system also supports dual-column configurations and backflushing, which are recommended for confirming analyte identity and reducing co-eluting interferences. With available autosampler options and seamless integration into LIMS environments, the Agilent 7890B is a trusted platform for laboratories performing high-volume environmental compliance testing. Its proven stability, strong documentation, and support for confirmatory workflows make it one of the most reliable GC-ECD systems available for long-term wastewater monitoring applications.

PerkinElmer Clarus 690 GC with ECD for EPA Method 608

The PerkinElmer Clarus 690 GC system with Electron Capture Detector is designed for high-sensitivity analysis of chlorinated pesticides and PCBs. It delivers exceptional ECD stability, rapid column heating, and enhanced baseline performance—ideal for trace-level analysis under EPA Method 608. Its TotalChrom software supports full regulatory compliance, from method setup to final data processing, ensuring laboratories maintain data integrity in high-volume wastewater analysis workflows.

The system’s injection precision and detector linearity ensure repeatable quantification, even in challenging wastewater matrices. With a compact design and intuitive operation, the Clarus 690 GC provides laboratories with a reliable, efficient tool for Method 608 compliance monitoring. Its dual-column capability and built-in auto-calibration features make it especially well-suited for contract labs or regulatory agencies that need dependable long-term instrument uptime and traceable reporting functionality.

Thermo Scientific TRACE 1310 GC with ECD for EPA Method 608

The Thermo Scientific TRACE 1310 GC offers modular flexibility and high-performance GC-ECD analysis for environmental applications. With its user-friendly interface, smart column connections, and advanced detector stability, this system delivers reliable and reproducible data for halogenated pesticide and PCB monitoring. Its ECD detector ensures ultra-trace sensitivity required for EPA Method 608 reporting limits, making it suitable for low-concentration analyte detection in challenging sample matrices.

Equipped with automated sample injection and full compliance with EPA protocols, the TRACE 1310 supports both single-column and dual-column confirmation workflows. The platform integrates easily with Thermo’s Chromeleon software, allowing method automation and secure data storage. It’s a preferred choice for labs requiring scalable instrumentation for accurate and efficient pesticide and PCB detection in wastewater samples, while maintaining full traceability and compliance under the Clean Water Act regulatory framework.

Shimadzu GC-2030 with Electron Capture Detector for EPA Method 608

The Shimadzu GC-2030 configured with an Electron Capture Detector is a modern, high-sensitivity platform ideal for EPA Method 608. It supports advanced temperature programming, high-efficiency capillary columns, and detector configurations tailored for halogenated compounds. The GC-2030’s intelligent flow control and stable ECD operation allow laboratories to achieve the low detection limits required by regulatory standards, while also maintaining excellent peak shape and retention time consistency.

For laboratories needing dual-column confirmation, the GC-2030 offers flexible plumbing and column switching options that reduce the risk of false positives. Combined with LabSolutions software for data acquisition and compliance reporting, this system supports regulated environmental workflows. Its long-term detector stability and energy efficiency also make it a practical investment for labs seeking sustainability without compromising performance in pesticide and PCB quantification under EPA Method 608 protocols.

Bruker Scion 456 GC with Electron Capture Detector for EPA Method 608

The Bruker Scion 456 GC, configured with an ECD, is a robust platform designed for long-term stability and high sensitivity in halogenated compound analysis. Its dual-channel capability and precision flow control enable consistent performance across repeated Method 608 analyses. Ideal for high-throughput environmental labs, the Scion 456 delivers exceptional reproducibility and peak resolution even during multi-analyte, multi-sample workflows that demand consistent results day after day.

With Bruker’s CompassCDS software, the system provides comprehensive data handling, audit trails, and regulatory reporting tools. Its flexible configuration supports column switching, multiple detector options, and customizable workflows for organochlorine pesticide and PCB analysis. Whether used in industrial, governmental, or third-party environmental laboratories, the Scion 456 ensures full compliance with EPA 608 specifications while maintaining accuracy and efficiency under rigorous operational demands.

Choosing the Right Instrumentation for EPA Method 608

EPA Method 608 requires gas chromatographs equipped with Electron Capture Detectors to achieve accurate quantification of chlorinated pesticides and PCBs. Labs must consider detector sensitivity, flow stability, column performance, and automation features when selecting a GC-ECD system. While GC-MS or GC-MS/MS can be used for confirmatory analysis, they are not approved for primary quantitation under Method 608, and cannot replace ECD systems for Clean Water Act compliance testing.

  • For high-throughput labs: The Agilent 7890B GC and Bruker Scion 456 GC offer excellent automation and dual-column configuration support for faster workflows.
  • For compliance-driven environments: The Thermo Scientific TRACE 1310 GC and PerkinElmer Clarus 690 GC deliver trace-level sensitivity and seamless integration with regulatory reporting tools.
  • For flexible method development: The Shimadzu GC-2030 provides dual-column confirmation and smart flow control for precise PCB and pesticide monitoring.

As a professional refurbisher of analytical instrumentation, we offer certified refurbished GC-ECD systems configured specifically for EPA Method 608 applications. Our inventory includes models from Agilent, Thermo Scientific, Shimadzu, PerkinElmer, and Bruker, each fully tested and calibrated. Contact us today to explore our available instruments and ensure your laboratory remains compliant, efficient, and ready to meet trace-level detection requirements for pesticide and PCB monitoring.