es9b05457_si_001.pdf (1.37 MB)
Nontarget Discovery of Per- and Polyfluoroalkyl Substances in Atmospheric Particulate Matter and Gaseous Phase Using Cryogenic Air Sampler
journal contribution
posted on 2020-03-06, 13:35 authored by Nanyang Yu, Haozhe Wen, Xuebing Wang, Eriko Yamazaki, Sachi Taniyasu, Nobuyoshi Yamashita, Hongxia Yu, Si WeiNovel
per- and polyfluoroalkyl substances (PFASs) have become a
key issue in global environmental studies. Although several novel
PFASs have been discovered in atmospheric particulate matter through
nontarget analysis, information on the environmental occurrence of
novel PFASs in atmospheric gaseous phases and conventional sampling
techniques is somewhat deficient. Therefore, this Article describes
a new type of air sampler, the cryogenic air sampler (CAS), which
was used to collect all atmospheric components simultaneously. Nontarget
analysis then was performed through PFASs homologue analysis. A total
of 117 PFAS homologues (38 classes) were discovered, 48 of which (13
classes) were identified with confidence Level 4 or above. Eleven
chlorinated perfluoropolyether alcohols (3 classes) and four chlorinated
perfluoropolyether carboxylic acids (2 classes) have been reported
for the first time in this Article. This Article is also the first
report of 12 hydrosubstituted perfluoroalkyl carboxylates (H-PFCAs)
in the atmosphere. H-PFCAs and chlorinated perfluoropolyether carboxylic
acids were mainly distributed in the particular phase. These results
are evidence that novel chlorinated polyether PFASs should be the
focus of future study.