Comparative Analysis of Free Formaldehyde Determination Methods in Acne Treatment Product Samples: Perbandingan Metode Pengujian Formaldehida Bebas pada Sampel Produk Anti jerawat. Journal Pharmasci (Journal of Pharmacy and Science), [S. l.], v. 11, n. 2, p. 307–322, 2026. DOI: 10.53342/pharmasci.v11i2.598. Disponível em: https://e-journal.akfarsurabaya.ac.id/index.php/jps/article/view/598. Acesso em: 4 aug. 2026.