Development of a 3D-Printed Paper-Based Microfluidic Colorimetric Sensor for Nitrate Detection Using Silver Nanoparticles (AgNPs). Malaysian J. Sci. Adv. Tech. [Internet]. 2026 Oct. 20 [cited 2026 Oct. 26];6(S2):99-104. Available from: https://mjsat.com.my/index.php/mjsat/article/view/823