Banjarnahor, Lelita Rosanna, Department of Chemistry, State University of Medan (Indonesia)
Banoeari, Annisa Tri, Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Medan (Indonesia)
Banoeari, Annisa Tri, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Bariyah, Shohihatun, Universitas Negeri Medan (Indonesia)
Barutu, Zeny Afriska, Chemistry Department, Universitas Negeri Medan, Jl. Willem Iskandar, Pasar V, Medan 20221, Indonesia (Indonesia)

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