Morning Coffees Could Hold the Secret to Spotting Deadly Dyes in Food

Scientists at the Raman Research Institute have developed a method to detect toxic molecules, such as the dye Rhodamine B, at extremely low concentrations by utilizing the coffee-stain effect. This technique involves the use of gold nanorods that form ring-shaped deposits during evaporation, enhancing the detection of harmful substances. The method is cost-effective and could potentially be used with handheld Raman spectrometers, offering a new approach to monitoring illegal dye usage in food and cosmetics.

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