Pangesti, Mahesi (2017) PENETAPAN KADAR VITAMIN C PADA TERONG CEPOKA (Solanum torvum S.) SEGAR DAN REBUS SECARA SPEKTROFOTOMETRI UV. Karya Tulis Ilmiah thesis, Universitas Setia Budi Surakarta.
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Abstract
Turkey berry is one of nutritious plant that used as traditional medicine and one of the healthy food sources that containing vitamin C. Vitamin C is an essential vitamin and important for body but it is can damaged by heat. Purpose of this research is to determine a reduction in vitamin C levels in turkey berry fresh and boiled. Research started from qualitative analisys followed by quantitative test with spectrophotometry. Variation of vitamin C standard concentration is 4.44 μg / ml; 6.66 μg / ml; 8,88 μg / ml; 11,1 μg / ml; 13,32 μg / ml yielding equation y = 0,083 + 0,04586x with value R = 0,999901. Maximum wavelength is measured at 240-280 nm and operating time for 20 minutes. The results of qualitative analisys showed that sample is containing vitamin C. Quantitative test resulted in a fresh sample rate of 0.226% w/w and a boiled sample of 0.161% w/w. The data were analyzed by paired sample t-test and showed that there was significant difference in vitamin C content in fresh and boiled turkey berry specified by UV spectrophotometry. Keywords : Vitamin C, Turkey berry and UV spectrophotometry
| Item Type: | Thesis (Karya Tulis Ilmiah) |
|---|---|
| Uncontrolled Keywords: | Vitamin C, Turkey berry and UV spectrophotometry |
| Subjects: | R Medicine > R Medicine (General) |
| Divisions: | Fakultas Farmasi > Prodi D3 Farmasi |
| Depositing User: | Rohma Tri Wardani |
| Date Deposited: | 23 Feb 2019 03:22 |
| Last Modified: | 23 Feb 2019 03:22 |
| URI: | http://repo.setiabudi.ac.id/id/eprint/673 |
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