KARAKTERISTIK SORPSI ISOTERMIS PADA APLIKASI SILIKA (SiO2) SEBAGAI ANTICAKING AGENT TEPUNG BUMBU
| Main Author: | Sugiarto, Yosra Adi Putra, Indah Yuliasih, dan |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Department of Agroindustrial Technology, Bogor Agricultural University
, 2018
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| Online Access: |
http://journal.ipb.ac.id/index.php/jurnaltin/article/view/24181 http://journal.ipb.ac.id/index.php/jurnaltin/article/view/24181/15826 |
Daftar Isi:
- Silica dioxide is one of anticacking agent as food additive. It can be encountered in nature, especially from rice husk ash waste. The objective of this study was to obtained rice husk-based silica and find out its characteristics, then apply it in seasoned flour to examine its characteristics during the storage period based on sorption isotherm. This research consists of two stages. The first stage is silica isolation from rice husk, it was started by washing rice husk using 5% citric acid as pre-treatment followed by 800oC combustion during an half of hour, then continued by analyzing the characteristics of both rice husk-based silica and synthetic silica as a comparison. Last stage is formulating seasoned flour with 0.5% and 1% both rice husk-based silica and synthetic silica as anticacking agent, followed by observing the phenomenon during storage periode to illustrates its sorption ishoterm curve. Characteristic prosedure using XRD analysis showed both synthetic silica and rice husk-based silica are possed an amorphous structure. SEM-EDX analysis was used to shows that there are 25.52% elements of C in rice husk-based silica and 10.23% of C and 1.29% of N formed in synthetic silica. Addition of both rice husk-based and synthetic silica onto seasoned flour indicates the occurance increasing number of critical and equilibrium moisture content, water activity, and ash content. Based on characteristic of sorption isotherm curve, the 1% addition of rice husk-based silica on seasoned flour formulation giving optimum number of primary, secondary, and tertiary boundary water fraction respectively 7.35%, 20.04%, 70.18%.Keywords: anticaking agent, rice husk, silica, silica dioxide and synthetic silica