Scientists have developed a sensor that will detect “forever chemicals” in drinking water that have been linked to cancer and other health problems. The research was published in the journal PNAS.
Perfluoroalkyl PFAS is found in food packaging, non-stick and waterproof coatings, cosmetics and many other household items. They do not break down naturally, and exposure has been linked by scientists to a variety of diseases, including cancer, reproductive problems, and disruption of the immune and endocrine systems.
The sensor is based on the same technology used in COVID-19 and pregnancy tests. In the second, hormones or components of the virus capture antigen molecules. In the PFAS test, this role is played by the substance polyaniline.
Researchers showed that they could detect PFAS in water at levels as low as 200 parts per trillion. However, this content is higher than recommended in the United States, and scientists are working to improve the test. The device will be useful not only for those who want to test drinking water, but also for manufacturers of semiconductors and fire equipment.
Currently, the only way for a consumer to determine whether their drinking water contains PFAS is to send a water sample to a laboratory. This process takes several weeks and costs hundreds of dollars.
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