PENGHILANGAN WARNA COKLAT LARUTAN GULA STEVIA MENGGUNAKAN KARBON AKTIF
ABSTRACT: At this time there
is many prospecting ofalternative natural sweetener that has a high level of
sweetness, low in calories and not carcinogenic. One of those is the natural
sweetener stevia from the leaves of the stevia plant. One of the method to get
the sweetener is byextracting the stevia leaf. However, after the process of
extraction the solution turns brown due to tannins that contained in the stevia
leaf. Oneof the processto eliminate tanninfrom the solution is by using
activated carbon to absorb tannins. Materials used in this research is dried
stevia leaves, water, activated carbon, and citric acid. Then equipments used
is beaker glass, pipette, measuring glass, magnetic stirrer, heater, pH meter,
filter paper, scale, and spectrophotometer. Extraction process used 65oC of
temperature, 300 rpm of stirring speed for 10 minutes. Adsorption processdid at
room temperature within 24 hours. After adsorption process each sample will be
analyze with spectrophotometer using 725 nm of wavelength to get the amount of
tannin contained. The result of this research is the higher pH operation that
used the smaller tannin that contained. Then the lower temperature that used to
heated the adsorbent the smaller tannin that contained. The optimum conditiom
for tannin adsorption based on this research is using 200 oC of temperature to
heated the adsorbent and using 6 of pH operation.
Penulis: Ibrahim Ghazi, Bayu
Wicaksono, Abdullah
Kode Jurnal: jpkimiadd130341
