Widi Astuti
* Corresponding Author
Chemical Engineering Department, Semarang State University, Semarang, Indonesia

I Made Bendiyasa
Chemical Engineering Department, Gadjah Mada University, Yogyakarta, Indonesia

Endang Tri Wahyuni
Chemistry Department, Gadjah Mada University, Sekip Utara Yogyakarta, Indonesia

Agus Prasetya
Chemical Engineering Department, Gadjah Mada University, Yogyakarta, Indonesia