KANNA, M.; PERMWONG, W.; SOMNAM, S. Low-cost portable photometer using wi-fi–enabled microcontroller and silicon photodiode for iron and phosphorus determination. Asia-Pacific Journal of Science and Technology, [S. l.], v. 31, n. 04, p. APST–31, 2026. DOI: 10.22299/apst.2026.286024. Disponível em: https://so01.tci-thaijo.org/index.php/APST/article/view/286024. Acesso em: 30 sep. 2026.