“Low-Cost Epoxy-Cast Serpentine Lab-on-Chip With Pre-Loaded Methyl Red for Smartphone-Based Colorimetric Screening of Free Acidity in Edible Oils”. Chemical Interactions 3, no. 3 (October 12, 2026): 34–41. Accessed October 12, 2026. https://cheminters.com/index.php/jci/article/view/102.