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All Journal Indonesian Journal of Chemistry and Environment
Priyambodo, E.
Universitas Negeri Yogyakarta
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science

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SYNTHESIS OF SILICA GEL FROM GLASS WASTE AND ITS APPLICATION ON SOLID PHASE EXTRACTION OF Pb(II) CATIONS Novisatri, M.B.; Priyambodo, E.; Sunarto, S.
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2018): June 2018
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i1.19576

Abstract

Waste glass is one of inorganic wastes which are significant in Indonesia and has not been handled properly. The high content of SiO2 in the glass waste allowed to be processed into silica gel through sol-gel methods. In this research, waste glass was destructed into micro size particles. After that, it was reacted with a sodium hydroxide solution, thus forming a solution of sodium silicate. Silica gel was obtained by reacting sodium silicate with hydrochloric acid. After a silica gel obtained, silica gel is dried and then characterized using infrared spectrophotometry. Using a glass column, silica gel is used as solid phase on solid phase extraction in terms of preconcentration of Pb(II) cations. Based on this research, preconcentration of Pb(II) cations by solid phase extraction using silica gel from glass waste is an effective method.
Content Analysis Of Vitamin C In Fresh And Processed Moringa Trees By Spectrophotometry And Iodometric Titration Methods Sarah, S.; Murthy, R.S.; Sugiarto, A. P.; Sariyati, S.; Priyambodo, E.
Indonesian Journal of Chemistry and Environment Vol 1, No 1 (2017): December 2017
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v1i1.18816

Abstract

The aims of this research were to examine the vitamin C content found in fresh and processed moringa trees and to know the method/ stage used to analyze the vitamin C content found in fresh and processed moringa trees. This research uses two methods namely spectrophotometric method and iodometry titration method. Initial stage prepare the sample of moringa, which were moringa leaf, moringa stem and moringa seed.  The results showed that at the wavelength of 600 nm and after the iodometric titration, all the moringa samples (leaves, stems and seeds) contain vitamin C. Both of this two methods, spectrophotometry and iodometric titration, is able to analysis vitamin C in Morianga trees.
Co-Authors Murthy, R.S. Novisatri, M.B. S. Sarah S. Sunarto Sariyati, S. Sugiarto, A. P.