1. Master of Chemistry Program, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret Surakarta, Jl. Ir. Sutami No. 36A, Kentingan Jebres, Surakarta, Central Java, Indonesia, 57126
2. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret Surakarta, Jl. Ir. Sutami No. 36A, Kentingan Jebres, Surakarta, Central Java, Indonesia, 57126