PTR-TOF on the road
Dr. Natalie Johnson’s Team uses high-tech mobile lab to monitor air pollution in disaster zones
When disaster strikes, clean air is often the first casualty and for residents, this can have long-term health consequences. After hurricanes, chemical plant fires, and industrial accidents, the ability to quickly assess air quality is critical. That’s where mRAPiD – the mobile Responding to Air Pollution in Disasters van – comes in, featuring a mobile PTR-TOF mass spectrometer for real-time VOC analysis.
Science on the road
Developed and operated by a pioneering team at the Texas A&M Superfund Research Center, the mRAPiD unit is a high-tech, custom-outfitted van designed to detect airborne toxins in real time. At the helm of this mobile lab is Dr. Natalie Johnson, associate professor and chair of the Interdisciplinary Toxicology Program at Texas A&M University, along with research scientist Navada Harvey, MS, in collaboration with Dr. Albert Presto, Research Professor at Carnegie Mellon University, who is a co-investigator in the Texas A&M Superfund Research Center.
The mRAPiD van is more than just a mobile air analysis lab – it’s a game-changer in environmental health research. Equipped with a suite of advanced atmospheric monitoring tools, the van allows the team to track volatile organic compounds (VOCs) and other hazardous substances right at the site of environmental disasters.
One of the most important instruments on board is the Proton-Transfer-Reaction – Time-of-Flight Mass-Spectrometer (an IONICON PTR-TOF 4000). This cutting-edge technology can detect a wide range of VOCs with ultra-high sensitivity and in real time, eliminating the need for time-consuming laboratory-based sample preparation and analysis in the lab. In an emergency, this capability is critical. Immediate data can guide decisions to protect first responders, firefighters, and nearby residents.
Meteorological data is collected using a Magellan weather sensor, while a high-precision GPS unit tracks the van’s movements and links measurements to exact locations. A roof-mounted sampling boom and an integrated air intake pump allow for constant sampling as the van travels through affected areas. All equipment is powered by lithium-ion phosphate batteries, ensuring stability and autonomy even in remote locations or when electricity supply is damaged. To ensure smooth operations under rugged conditions, the van’s suspension has been upgraded, and delicate equipment such as the mass spectrometer is stabilized by a custom gimbal system.
From lab to front lines
This mobile unit has already been successfully deployed in the real world under challenging conditions. The mRAPiD team was on the ground after the East Palestine, Ohio train derailment, as well as during the aftermath of a plastics recycling facility fire. In both cases, the van provided real-time, actionable data on air quality right at the site of the disasters, bypassing the delays associated with lab-based analysis and providing immediate insights that could shape safety measures and emergency response protocols.
The innovation and dedication behind the mRAPiD initiative reflect the vision of Dr. Johnson and her team: to bring science directly to the front lines where it matters most. Their work is a powerful example of how mobile, high-tech environmental monitoring can protect communities, support public health, and redefine how we respond to crises.
To learn more about PTR-MS applications, view our case studies to see how our customers use PTR-MS instruments for advanced research, mobile and field campaigns, and laboratory work.
Photo Credits: Stephen Arnold & Texas A&M University