Uncovering Hidden VOC Sources with Mobile Monitoring

In our pursuit of cleaner air and sustainable transportation, understanding all sources of emissions is critical. While efforts to phase out fossil-fuel-powered vehicles are progressing, new research reveals that we may be overlooking significant contributors to volatile organic compound (VOC) emissions.

A recent study by the Wolfson Atmospheric Chemistry Laboratory (WACL) at the University of York, in collaboration with Syft Technologies, sheds light on an unexpected culprit: motor vehicle screen wash. Using Selected Ion Flow Tube Mass Spectrometry (SIFT-MS) integrated into the WACL Air Sampling Platform (WASP), researchers experimentally verified that screen wash is a significant source of unreported VOC emissions, particularly ethanol and methanol.

The Study

The study, conducted as part of the Observation System for Clean Air (OSCA) project, measured VOC emissions at roadside and urban background sites in Manchester, UK. Researchers collected data during two intensive monitoring periods, revealing that ethanol and methanol concentrations near roadways were significantly higher than those at urban background sites.

Interestingly, motor vehicle screen wash was identified as a substantial contributor to these emissions. This finding is especially relevant as we transition to electric and hydrogen-powered vehicles, which lack tailpipe emissions but still rely on screen wash.

Why It Matters

This discovery has far-reaching implications. First, it highlights the need for comprehensive VOC monitoring that accounts for all sources—not just those linked to exhaust emissions. Second, it emphasizes the importance of addressing non-tailpipe emissions in policy discussions surrounding sustainable transportation.

By integrating SIFT-MS into environmental monitoring platforms like WASP, scientists can provide policymakers with accurate, real-time data to drive informed decisions.

Using SIFT-MS

As we advance toward a cleaner future, technologies like SIFT-MS will play a pivotal role in uncovering hidden emission sources and improving air quality. The WACL study is a testament to how innovative tools and interdisciplinary collaboration can illuminate blind spots in our understanding of environmental challenges.

Learn more by reading the application note, “Real-Time Roadside SIFT-MS Monitoring: Unreported VOC Emissions from Road Transport.”