PREECHABURANA, Pakorn, Somsak SANGNUY, and Supaluck AMLOY. “Paper-Based Colorimetric Sensor for Mercury Ion Detection Using Smartphone Digital Imaging”. Journal of Metals, Materials and Minerals 33, no. 2 (June 27, 2023): 81–87. Accessed April 14, 2024. https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1653.