The Colorimetric Detection Unit (IMAGE) Hokkaido University Caption The colorimetric detection unit displays diagnostic colors depending on the concentration of lithium ion. F28 tetraphenylporphyrin is used for the detection reagent. (Komatsu T. et al., ACS Sensors, April 23, 2020) Credit Komatsu T. et al., ACS Sensors, April 23, 2020 Usage Restrictions This image is copyrighted and can be used for reporting this research work without obtaining a permission if credited as instructed. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.