Air Adsorption Tubes and Sorbents

Air Sampler for PFAS FM4

An air sampler called FM4 for per- and polyfluoroalkyl substances (PFAS) was developed for analyzing PFAS in air. PFAS analysis using FM4 is a groundbreaking approach, which enabled the simultaneous collection and analysis of particulate and gaseous PFAS in air.
In conventional collection methods based on filtration, accurate measurement is often difficult because gaseous PFAS may be adsorbed on particles collected on the filter surface. A gaseous PFAS may change to its non-volatile form during sampling.
To solve these limitations, the FM4 was designed with an impactor that minimizes the contact between particles and gas and three types of adsorbents, which enable simultaneous collection of ionic and neutral/volatile PFAS.
The collected PFAS is eluted with organic solvents and quantified by gas chromatography-tandem mass spectrometry (GC-MS/MS) and liquid chromatography-tandem mass spectrometry (LC-MS/MS).
Conventional activated carbons typically contain complicated pores. They have been used as adsorbents for PFAS; however, the complete elution of adsorbed PFAS is difficult to achieve. Therefore, we developed a new functional activated carbon adsorbent (GAIAC), which was used as the gas-type adsorbent. GAIAC is an innovative sorbent that is composed of synthetic resin fiber with optimized pore and surface activity, which enable the collection and elution of PFAS.

Air Sampler for PFAS FM4
Air Sampler for PFAS FM4


・Comprehensive Sampling
Despite its compact size, the FM4 Air Sampler can simultaneously collect both particulate and gaseous substances. It allows the amount of each substance collected to be separately determined, making it possible to comprehensively evaluate the sampled air.

・Capable of Collecting Gaseous PFAS such as FTOHs
Up to now, it has been difficult to collect gaseous PFAS in the air. However, thanks to the FM4 Air Sampler’s newly developed activated-carbon desorption material, this is no longer a problem.

・Excellent Recovery Rate
We have tested the FM4 Air Sampler with a wide range of PFAS and have achieved excellent recovery rates for all of them.

・Portable and Easy to Deploy
Because the FM4 Air Sampler is lightweight and compact, it is easy to carry and, with its very small installation footprint, easy to deploy.

Product Structure

Recovery of Gaseous PFAS (general atmosphere)

Analyses of Neutral (Volatile) PFAS using GC-MS/MS



FM4Aluminum (anodizing treatment)Φ60 mm×195 mmapprox. 900 gRc 1/41 set1050-13015

・ When using it outside, put it in a place rain cannot enter inside.
・ This product does not include a sampling pump.


DescriptionSpecificationNumber of use per samplingSDSQty.Cat.No.
Quartz Fiber Filter QFF31Impactor section, Φ31mm3 pcs100 pcs1050-13022
Quartz Fiber Filter QFF47Backup, Φ47 mm1 pc100 pcs1050-13023
Polyurethane Foam PUF4750Φ47 mm×50 mm1 pcENG10 pcs1050-13021
Activated Carbon Fiber Disk (GAIAC FF047)Φ47 mm×2 mm1 pcENG20 pcs (2/pk × 10pks)1050-13020

・ This product was developed in a joint effort by National Institute of Advanced Industrial Science and Technology (AIST) and FUTAMURA CHEMICAL CO.,LTD.
・ The specifications of this product are subject to change without notice.
・ GL Sciences is registered trademarks of GL Sciences Inc.
・ GAIAC is a trademark of FUTAMURA CHEMICAL CO.,LTD.
・ All other trademarks are property of their respective owners.


1. ISO 25101:2009. Water quality. Determination of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) — Method for unfiltered samples using solid phase extraction and liquid chromatography/mass spectroscopy.
2. ISO 21675:2019. Water Quality. Determination of Polyfluorinated Alkyl Substances (PFAS) in Water d Method Using Solid Phase Extraction and Liquid Chromatography-Tandem Mass Spectrometry (LC-MS / MS).
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