October 14, 2025 10:59 PM
Morning coffee inspires breakthrough in detecting toxic dyes in food and water
A phenomenon as simple as a coffee stain on a table may hold the key to detecting dangerous toxins in food and water at extremely low concentrations. Scientists at Raman Research Institute (RRI), supported by the Department of Science and Technology, Government of India, have developed a powerful and cost-effective technique that uses the coffee-stain effect to identify harmful dyes such as Rhodamine B at concentrations as low as one part per trillion. When a coffee droplet dries, it leaves a d...