MIT chemists have created a novel sensor that can identify traces of PFAS, or perfluoroalkyl and polyfluoroalkyl compounds, also referred to as “forever chemicals.”
These substances, which are present in commonplace products like food packaging and nonstick cookware, are persistent and have been linked to a number of diseases, including cancer and reproductive problems. As a result, they offer serious health hazards.
The sensor uses a unique polymer known as polyaniline and uses lateral flow technology similar to fast Covid-19 testing.
When protons are present, this polymer exhibits changes in conductivity that make it possible to detect PFAS in water samples at concentrations as low as 200 parts per trillion.
Although this is not as good as what the EPA now recommends, work is being done to improve sensitivity using a larger-scale device that can filter one liter of water—that is, possibly more than a hundred times better.
This invention has potential benefits for PFAS-dependent sectors and consumers alike because it provides a quicker and less expensive substitute for conventional detection techniques, which frequently necessitate expensive and time-consuming laboratory testing.
If the gadget is successful, it could allow for the quick detection of PFAS contamination in drinking water, which would encourage the adoption of commercial filters to reduce health hazards.
Additionally, producers who use PFAS in their operations might make use of the sensor to make sure that environmental regulations are followed, improving safety protocols and lowering the possibility of ecological damage.
