BAPA, Yustina; BOTAHALA, Loth. Effect Of The Contact Time Of Candlenut Shell Charcoal And H3PO4 Activator As On The Purification Process Of Used Cooking Oil. Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta), [S. l.], v. 12, n. 2, p. 104–110, 2019. DOI: 10.70561/ica.v12i2.7889. Disponível em: https://journal.unhas.ac.id/index.php/ica/article/view/7889. Acesso em: 27 feb. 2026.