1. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
2. Central Laboratory, Universitas Padjadjaran, Jatinangor 45363, Indonesia
3. Faculty of Teacher Training and Education, Universitas Jambi, Mendalo Indah, Jambi 36361, Indonesia
4. School of Chemical Sciences, Universiti Sains Malaysia, Minden, Penang 11800, Malaysia