PFAS emissions change in seconds. Your measurements should capture that.

RJ Lee Group brings mobile analytical capabilities and environmental forensics expertise to airborne PFAS investigations, from ambient air and fencelines to process streams and stack investigations.

High-resolution chemical ionization time-of-flight mass spectrometry (CIMS), including AIM-TOF-MS configurations, enables real-time tracking of fluorotelomer alcohols (FTOHs) and trifluoroacetic acid (TFA).

IODIDE: SENSITIVE DETECTION WITH LIMITED FRAGMENTATION

Iodide reagent ions (I⁻) form molecular adducts with FTOHs and perfluoroalkyl carboxylic acids. Peer-reviewed research reports detection limits of 0.19 to 3.1 parts per trillion by volume (pptv) for selected gas-phase PFAS with 3-second averaging.

Published TOFWERK AIM data show:

• 6:2 FTOH: 1.8 pptv at 1 second

• 8:2 FTOH: 1.1 pptv at 1 second

• TFA: 4 pptv with 1-minute averaging
  

The air sampling probe on an RJLee Group mobile testing laboratory 

SUPEROXIDE: AN EMERGING OPTION FOR MOBILE MEASUREMENTS

Superoxide reagent ions (O₂⁻), generated from purified air, offer promising detection of FTOHs and other oxygenated PFAS without a methyl iodide reagent supply. A 2026 study captured real-time 6:2 FTOH emissions from food packaging. Its limited response to perfluorocarboxylic acids makes iodide the better-supported chemistry for TFA-focused work.

BRING YOUR PFAS CHALLENGE TO RJ LEE GROUP

• Mobile ambient and fenceline plume investigations

• Process-emission tracking during operating changes

• Stack investigations and treatment-system evaluations

• Product off-gassing and PFAS method development

Follow emission changes as they happen. Locate potential sources. Connect measured compounds with process conditions.

Published instrument sensitivity reaches single-digit pptv, and lower for selected compounds. Field reporting limits require validation for the sampling system, humidity, interferences, and dilution, particularly in process and stack matrices.

Contact RJ Lee Group to design a real-time PFAS investigation around your compounds, your process, and your decisions. 

Related reading: Unlocking the Secrets of PFAS Testing Methods