MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202541134236 A) filed by Harini Sri. R; Lfa S. A; Indhu Harini R; and Priyadharshini B, Coimbatore, Tamil Nadu, on Dec. 31, 2025, for 'development of fruit-based bio-indicator strips for ph and food spoilage detection.'
Inventor(s) include Harini Sri. R; Ifa S. A; Indhu Harini R; and Priyadharshini B.
The application for the patent was published on Feb. 27, under issue no. 09/2026.
According to the abstract released by the Intellectual Property India: "Food spoilage is a major global concern that leads to economic loss and serious health risks. One of the important indicators of food spoilage is the change in pH caused by microbial growth. In this project, natural pigments obtained from fruit peels such as black grapes, jamun, and dragon fruit are used to develop bio-indicator strips for detecting pH variation and food spoilage. These fruits contain anthocyanins, which are natural water-soluble pigments that show distinct color changes at different pH values. The pigments are extracted using ethanol or distilled water and then impregnated onto filter paper strips. The prepared strips are tested using buffer solutions and real food samples such as milk, fish, and cooked rice. The bioindicator strips show visible color change ranging from red in acidic conditions, purple at neutral pH, and greenish-yellow in alkaline conditions. The strips are biodegradable, renewable, non-toxic, inexpensive, and environmentally sustainable, making them highly suitable for smart food packaging and pH monitoring applications. This project demonstrates the potential use of fruit waste as a value-added product in biotechnology and food safety."
Disclaimer: Curated by HT Syndication.
