WANNAPROM, N.; KHANHUATHON, Y. Development of Simple Device based on Gas Diffusion with Natural Reagent Immobilized Paper and Digital Image Colorimetry for Ammonia Determination. Journal of Applied Research on Science and Technology (JARST), [S. l.], v. 19, n. 1, p. 86–96, 2020. DOI: 10.14456/rj-rmutt.2020.8. Disponível em: https://ph01.tci-thaijo.org/index.php/rmutt-journal/article/view/240257. Acesso em: 5 mar. 2024.