Pulungan, Ahmad Nasir, Department of Chemistry, Faculty of Mathematic and Natural Science, Universitas Negeri Medan
Pulungan, Ahmad Shafwan, Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, 20221, Indonesia (Indonesia)
Pulungan, Ahmad Shafwan, Departement of Chemistry, Faculty of Mathematics and Natural Science, Medan State University, 20221, Indonesia (Indonesia)
Pulungan, Akhir Mauludin, Department of Chemistry, Faculty of Mathematic and Natural Science, Universitas Negeri Medan
Purba, Caecilia Antonia, Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Medan, Medan Indonesia (Indonesia)

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