A new low-cost sensor made of metal oxide nanoparticles–reduced graphene oxide composite can detect formalin adulteration in fishes at room temperature in a non-invasive way.
- The sensor shows long-term stability with a low detection limit.
- Food adulteration is the practice of adding illegal or harmful substances to food to make it appear more appealing or to increase its shelf life.
- Formalin is an aqueous solution that is 37% formaldehyde by weight
- Formaldehyde is a colourless, pungent gas that is used in a variety of industrial processes, including as a preservative in some foods, commonly in fish in developing countries.
- However, the use of formaldehyde in food is illegal in many countries, as it is a known carcinogen.
- Exposure to formaldehyde can irritate the skin, throat, lungs, and eyes. Repeated exposure to formaldehyde can possibly lead to cancer.
Workers may be harmed by exposure to formaldehyde. The level of exposure depends upon the dose, duration, and work being done.
