PENGARUH JENIS SOLVENT TERHADAP STABILITAS ZAT WARNA PADA EKSTRAK KELOPAK BUNGA ROSELLA DENGAN METODE ANALISA SPEKTROFOTOMETER (Solvents Effect to Substance Stability of Rosella Flower Extract with Spectrophotometer Analysis Method )

SARI, RAHMAH PUSPITA (2015) PENGARUH JENIS SOLVENT TERHADAP STABILITAS ZAT WARNA PADA EKSTRAK KELOPAK BUNGA ROSELLA DENGAN METODE ANALISA SPEKTROFOTOMETER (Solvents Effect to Substance Stability of Rosella Flower Extract with Spectrophotometer Analysis Method ). Undergraduate thesis, Undip.

[img]
Preview
PDF (COVER) - Published Version
86Kb
[img]
Preview
PDF (HALAMAN PENGESAHAN) - Published Version
82Kb
[img]
Preview
PDF (KATA PENGANTAR) - Published Version
129Kb
[img]
Preview
PDF (DAFTAR ISI) - Published Version
141Kb
[img]
Preview
PDF (DAFTAR TABEL) - Published Version
132Kb
[img]
Preview
PDF (DAFTAR GAMBAR) - Published Version
130Kb
[img]
Preview
HTML (BAB I) - Published Version
137Kb
[img]
Preview
PDF (BAB II) - Published Version
436Kb
[img]
Preview
PDF (BAB III) - Published Version
123Kb
[img]
Preview
PDF (BAB IV) - Published Version
146Kb
[img]
Preview
PDF (BAB V) - Published Version
158Kb
[img]PDF (BAB VI) - Published Version
Restricted to Repository staff only

325Kb
[img]
Preview
PDF (BAB VII) - Published Version
83Kb
[img]
Preview
PDF (DAFTAR PUSTAKA) - Published Version
135Kb
[img]
Preview
PDF (LAMPIRAN) - Published Version
435Kb

Abstract

Red roselle (Hibiscus sabdariffa L.) is one of the plants that have high antioxidant content in the petals. Most influence antioxidant content is anthocyanin. Anthocyanin is the natural pigment that gives the red color pigment classified as flavonoids and are generally soluble in water so widely used for teas and potential as a natural dye. The purpose of this study are: (1) to determine the stability of the dye due to the influence of the type of solvent extracts rosella flower petals, (2) to determine the effect of heating with variations in temperature and pH stability of the color of the solvent to extract rosella flower petals. This research was conducted by extracting samples with aquadest and 95% ethanol with a ratio of (1:15); (1:25); (1:35) and (1:45) w/v with T = 30oC, 40oC, 50oC and 60oC (aquadest only) and pH 2,3,4 and 5. The extract obtained is used to test the stability of the color after the process of maceration during 24 hours using visible spectrophotometer. Results from this study showed that 95% ethanol with the ratio of 1:15 (w/v) is the best solvent to extract the rosella flower petals by absorbance at 3,352 at pH 2. While the distilled water extraction conditions is best done on a heating temperature of 30 ° C with pH 2 and ratio of 1:15 (w / v). Besides the influence of temperature and pH showed that the higher the heating temperature and the higher the pH value, the concentration of the extract wana rosella flower petals lower

Item Type:Thesis (Undergraduate)
Subjects:T Technology > TP Chemical technology
Divisions:Faculty of Engineering > Diploma in Chemical Engineering
Faculty of Engineering > Diploma in Chemical Engineering
ID Code:47872
Deposited By:Mrs Pudja D3 Teknik Kimia
Deposited On:10 Mar 2016 13:36
Last Modified:10 Mar 2016 13:36

Repository Staff Only: item control page