MUMBAI, India, March 13 -- Intellectual Property India has published a patent application (202641003533 A) filed by Christ University, Bangalore, Karnataka, on Jan. 13, for 'paper based colorimetric sensor for the rapid colorimetric detection of paracetamol.'
Inventor(s) include Simran Nagpal; Vinod T. P; Zubin Philip; and Sankarganesh Arunanchalam.
The application for the patent was published on March 13, under issue no. 11/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a simple, rapid, anti cost-effective colorimetric method for detecting paracetamol using a paper-based sensor impregnated with ferric chloride and potassium ferricyanide. The principle of detection is based on the redox reaction between paracetamol and the Fe3+ system, leading to the formation of a Prussian blue complex, which produces a distinct blue coloration on the paper strip. The sensor is prepared by immersing cellulose-based paper in an equal-volume mixture of FeCb and KJ[Fe(CN)6] solutions, followed by drying at room temperature. Upon addition of a sample containing paracetamol, the sensor displays an immediate and visible blue color. Images of the test strips were taken using a smartphone, and the color intensity was quantified by analyzing the RGB channels of the reaction area using a smartphone application. The strip was also validated for the detection of paracetamol spiked in commercially available processed beverages, demonstrating its applicability for detecting unauthorized or accidental contamination. This invention provides a portable, visual, and non-instrumental colorimetric sensing platform for paracetamol detection. The sensor also holds potential for forensic applications, allowing rapid presumptive testing for paracetamol at crime scenes."
Disclaimer: Curated by HT Syndication.
