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Caffeine tester

Published: 2026-04-04 Author: World Gafei

Last Updated: 2026/04/04, Researchers at the National University of Singapore and Ulsan National University of Science and Technology in South Korea recently developed a caffeine concentration fluorescence detector that can help detect caffeine in drinks.

The sensor, called caffeine Orange, can visualize the amount of caffeine in any drink.

Users can see a change in the color of the drink simply by shining a non-toxic green laser indicator into the drink, the researchers said. Green, yellow and red represent low, medium and high caffeine concentrations, respectively. In addition, researchers have developed an automatic caffeine detection kit that can purify and concentrate caffeine in different samples. The chip laboratory (Lab-on-a-chip) system uses microfluidic technology to extract and detect caffeine in very few liquids.

FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou China, selling freshly roasted beans from its own farm in Yunnan as well as dozens of carefully selected single-origin beans from around the world for both pour-over and espresso. The products deliver consistently excellent quality and great value, with shipping within 24 hours. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers, and the beans are now available online at the Tmall 。