A new sensor that can detect dangerous chemicals in water

MIT researchers have developed a new sensor that can detect chemicals in water in a cheap and fast way.

According to Tekna's technology and technology news service, chemists at MIT University can identify substances known as perfluoroalkyl and polyfluoroalkyl using their new sensor. These chemicals are present in non-stick containers of consumer products and food packaging and have harmful effects on human health. These compounds, which are called permanent chemicals, cannot be decomposed in nature.

The harmful effects of these chemicals on health include cancer, reproductive problems, endocrine problems, and immune system disorders. In their new project, the researchers were able to detect the levels of these chemicals in water samples with the help of this new sensor at 200 parts per trillion. Also, using this sensor is a way to test the health of water. Another advantage of this sensor is its use in industries based on these chemicals, including semi-media production.

Currently, thousands of consumer products have coatings containing these chemicals. For example, cookware covers, waterproof clothes, stain-resistant fabrics, grease-resistant boxes, volcanic foams, and cosmetic products are among the items containing these chemicals.

The widespread use of these chemicals began in the 1950s. These substances can be released from sewage treatment plants, landfills or factories and enter the air, soil, or water. According to tests, all 50 US states have these chemicals in their drinking water sources.

The sensor based on lateral flow technology of MIT researchers will be a cheap and fast way to detect the presence of these chemicals in water. This method is also used for quick tests of covid or pregnancy. In this sensor, a special polymer called polyaniline is used, which can change shape from semi-conductive and conductive states when a proton is added to the material.