CHOLILLAH, Vidya Nur. IDENTIFICATION OF FUNCTIONAL GROUPS IN SLUDGE 120C OF AMMONIA IB FACTORY PT PETROKIMIA GRESIK BY ATR-FTIR METHOD. Unesa Journal of Chemistry, [S. l.], v. 14, n. 1, p. 15–19, 2025. DOI: 10.26740/ujc.v14n1.p15-19. Disponível em: https://ejournal.unesa.ac.id/index.php/unesa-journal-of-chemistry/article/view/71280. Acesso em: 9 jan. 2026.