OPTIMAL CONDITIONS FOR SPECTROPHOTOMETRIC DETERMINATION OF IRON (III) IONS USING INDIGO. INTERNATIONAL JOURNAL OF SCIENCE AND TECHNOLOGY, [S. l.], v. 2, n. 8, p. 44–47, 2025. DOI: 10.70728/tech.v2.i08.016. Disponível em: https://science-technology.uz/index.php/journal/article/view/426. Acesso em: 2 aug. 2025.