ONE-STOP SOLUTION FOR EPA METHOD 325

Significance of the Topic

Ongoing regulatory demands require petroleum refineries to monitor fence-line emissions of volatile organic compounds (VOCs), especially benzene and related species, to protect human health and the environment.

Objectives and Study Overview

This article presents a turnkey solution for compliance with EPA Method 325 A/B. It outlines sampling and analysis workflows, instrumentation, and support services designed to help U.S. refineries meet regulatory requirements by the end of 2017.

Methodology and Used Instrumentation

A two-part approach is described:

• EPA Method 325A: Passive sorbent tube sampling at fence-line locations, with defined sample numbers based on refinery size and quality controls.
• EPA Method 325B: Thermal desorption–gas chromatography/mass spectrometry (TD-GC/MS) analysis of collected tubes.

Key instrumentation:

• TurboMatrix™ ATD: Automated thermal desorber meeting all Method 325 criteria with in-line tube conditioning and high throughput.
• Clarus® SQ 8 GC/MS: Sensitive, robust mass spectrometer with fast oven cycling and integrated TurboMass™ software for streamlined environmental reporting.

Main Results and Discussion

The combination of TurboMatrix ATD and Clarus SQ 8 GC/MS enables sub-four-minute chromatographic runs for major VOC targets (benzene, toluene, ethylbenzene, xylenes, 1,3-butadiene) without sacrificing accuracy. Sampling plans scale with refinery acreage, ensuring adequate coverage, duplicates, blanks, and calibration checks.

Benefits and Practical Applications

• One-stop compliance solution from field sampling through data reporting.
• Bar-coded tubes for traceability and simplified chain-of-custody.
• Automated workflows reduce labor, turnaround time, and analytical costs.
• Global support network and training ensure reliable implementation.

Future Trends and Potential Uses

Advanced TD-GC/MS platforms will continue to evolve with higher sensitivity, faster analysis times, and integrated digital reporting. Emerging ambient monitoring sensors and data-analytics software may complement passive sampling to deliver real-time fence-line air quality insights.

Conclusion

PerkinElmer’s integrated sampling and analysis solution addresses the stringent requirements of EPA Method 325 A/B, enabling refineries to efficiently monitor VOC emissions at the fence line and maintain regulatory compliance.

References

No additional references provided.