Endang Sawitri (Master Program of Chemistry, Faculty of Sciences and Mathematics, University of Diponegoro, Semarang, Indonesia, Indonesia)
Choiril Azmiyawati (Master Program of Chemistry, Faculty of Sciences and Mathematics, University of Diponegoro, Semarang, Indonesia, Indonesia)
P Siahaan (Master Program of Chemistry, Faculty of Sciences and Mathematics, University of Diponegoro, Semarang, Indonesia, Indonesia)
Adi Darmawan (Master Program of Chemistry, Faculty of Sciences and Mathematics, University of Diponegoro, Semarang, Indonesia, Indonesia)
