MODIFIKASI SILIKA GEL DENGAN METODE GRAFTING DAN APLIKASINYA SEBAGAI FASE DIAM PADA KOLOM KROMATOGRAFI
| Main Authors: | , MUGIANTON, , Dr. Roto, M.Eng., |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2012
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/101026/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=57517 |
Daftar Isi:
- The preparation of octadecylsilica (ODS) by the grafting method as stationary phase of cromatography column has been investigated. The stationary phase was used to simulate the separation of a mixture containing benzene, toluene, naphthalene, and to determine the concentration of ascorbic acid in soft drinks. This study began with the activation of silica gel using 20% HCl (v/v). Calcination was performed at 200, 300, 400 and 450 °C for 4 hours followed by modification with n-octadecyltriethoxysilane (ODTS) as bonded phase. Characterization of ODS showed a decrease in surface area, pore volume, pore radius. Strong infrared absorption at 2931.80 cm-1 and 2854.65 cm-1 indicates asymmetric and symmetric streching vibrations of methylene group, respectively. The optimum conditions obtained by calcination 300 °C with surface area, pore volume and pore radius of 281.82 m2/g