全氟辛酸
检出限
聚苯胺
电阻率和电导率
电导率
肺表面活性物质
化学
材料科学
纳米技术
聚合物
环境化学
色谱法
有机化学
生物化学
物理化学
电气工程
聚合
工程类
作者
Sohyun Park,Cheng Gordon,Timothy M. Swager
标识
DOI:10.1073/pnas.2317300121
摘要
Perfluoroalkyl substances (PFAS), known as “forever chemicals,” are a growing concern in the sphere of human and environmental health. In response, rapid, reproducible, and inexpensive methods for PFAS detection in the environment and home water supplies are needed. We have developed a simple and inexpensive perfluoroalkyl acid detection method based on an electrically read lateral flow assay (e-LFA). Our method employs a fluorous surfactant formulation with undoped polyaniline (F-PANI) fabricated to create test lines for the lateral flow assay. In perfluoroalkyl acid sensing studies, an increase in conductivity of the F-PANI film is caused by acidification and doping of PANI. A conductivity enhancement by 10 4 -fold can be produced by this method, and we demonstrate a limit of detection for perfluorooctanoic acid (PFOA) of 400 ppt and perfluorobutanoic acid of 200 ppt. This method for PFOA detection can be expanded for wide-scale environmental and at-home water testing.
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