7200A-PFAS System
OTM-50 is a draft analytical method developed by the U.S. EPA to identify and quantify volatile fluorinated compounds (VFCs) emitted from stationary sources. Air samples are collected in evacuated canisters and analyzed by gas chromatography–mass spectrometry (GC-MS).
This method plays a critical role in verifying the destruction of per- and polyfluoroalkyl substances (PFAS) in high-temperature treatment systems such as incinerators. When PFAS compounds are not fully mineralized, they can break down into lighter volatile byproducts—many of which are toxic or persistent in the environment.
Originally designed to evaluate PFAS destruction efficiency, OTM-50 is now being explored for broader use in industrial emissions testing and ambient air monitoring. Its compound list includes 30 VFCs, ranging from ultra-volatile species like CF₄ to more complex fluorinated organics, providing a detailed chemical fingerprint of incomplete PFAS combustion.
OTM-50
Why It Matters Now
Why Monitor PFAS in Air?
PFAS and VFCs are:
- Highly mobile and easily transported through the atmosphere
- Released during industrial processes, combustion, and product degradation
- Not effectively captured by legacy methods designed for heavier, less volatile compounds
As understanding of inhalation risk grows, airborne PFAS monitoring is rapidly becoming a regulatory priority.
Why Choose the Entech 7200A-PFAS Preconcentrator?
- Recovers all OTM-50 compounds, including ultra-volatiles like CF₄
- Complete recovery of all 30 OTM-50 compounds in a single 200cc run
- Eliminates CO₂ through a unique heart-cutting process
- Achieves low ppt sensitivity on modern GCMS and GCMSMS platforms
- Uses liquid nitrogen traps for fast cooldown and high throughput
- Includes a Heavy Organics Guardian (HOG) to protect GasPro columns
- Seamlessly integrates with Entech autosamplers including SkyCan and 7016D
- Fully compliant with OTM-50
Entech provides a complete OTM-50 Solution
| . | Step | Entech Innovation | Key Benefit |
|---|---|---|---|
 | Sample Collection | Silonite Canisters for Sample Collection | Clean, artifact-free sampling with method-compliant fill control |
 | Autosampler Integration | SkyCan (SK40, SK75) or 7016D+ | Scalable automation for unattended analysis of up to 60 canisters |
 | CO₂ Management | Patented Heart-Cut Process in 7200A-PFAS | Removes high levels of CO₂ without losing any PFAS or VFC targets |
 | Water Elimination | Sub-zero Knockout Traps | Dew point reduction to -20°C preserves column integrity and improves precision |
Autosampler Compatibility and Throughput
To ensure consistent results and minimal carryover, Entech recommends a minimum 1.4L canister size for ambient PFAS analysis. The 7200A-PFAS supports three autosampler options:
SkyCan 40 (SK40)
SkyCan 75 (SK75)
7016D+ Autosampler
7200A-PFAS Chromatograms
What Makes the 7200A-PFAS Unique
Captures all OTM-50 analytes including CF₄ and C₂F₆ in one run
Processes samples with up to 4% CO₂ and high relative humidity
LN₂ cooling enables cycle times 3–4 times faster than Peltier-based systems
Heavy Organics Guardian (HOG) prevents contamination from C9–C16 residues
Eliminates dual-run requirements often needed in competing systems
Low-ppt detection demonstrated using SIM/SRM with modern MS platforms
Applications Beyond Stack Monitoring
- Fenceline monitoring
around industrial or incineration sites
- Ambient air studies
in rural, urban, or downwind zones
- Indoor air quality
assessments in homes, offices, or schools
- Post-fire and disaster response
air screening
- Technology validation
for PFAS destruction systems
- Baseline and longitudinal research
into environmental PFAS exposure
Be ready for where PFAS monitoring is going.
Start with Entech
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