ISOLASI STEROID DARI FRAKSI N-HEKSANA BATANG TUMBUHAN ASAM KANDIS (Garcinia cowa)

PUTRI, DINI ARISTA and Muharni, Muharni and Fitrya, Fitrya (2012) ISOLASI STEROID DARI FRAKSI N-HEKSANA BATANG TUMBUHAN ASAM KANDIS (Garcinia cowa). Undergraduate thesis, Sriwijaya University.

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Abstract

Steroid compound from n-hexane fraction of asam kandis (Garcinia Cowa) stem has been isolated. Isolation begins with the extraction by maceration using increasing polarity (n-hexane, ethyl acetate and methanol). The separation and purification performed by chromatographic techniques. Determining the structure of the isolated compound based on the analysis of spectroscopic data include UV, IR and NMR spectroscopy. The isolated compound in the form of white crystals with a melting point of 211-213°C. UV spectrum doesn’t showed absorption in the UV, IR spectrum showed absorption at wave number 3423.3 (OH), 2937.4 and 2958.6 (CH aliphatic), 1639.4 (C = C isolated) and 1055.0 cm'1 (C-O alcohol). 'H-NMR spectrum showed three signals for the CH vinilik at 5h 5.35, 5.12 and 5.03 ppm. The signal at 5h 3.52 ppm (IH, m) which is typical for protons attached to the C binding OH on steroid compounds. l3C-NMR spectrum showed 29 signals and 4 signals including signal indicating a compound C sp2 isolation results have two double bonds are typical for stigmasterol. DEPT spectrum analysis showed 29 C signals and 6 of them as the primary sebangai C, 9 C secondary, 11 C tertiary, and 3 C quatemary. Based on spectroscopic data by comparing the data in the literature stigmasterol concluded that the isolation of compounds which are steroids stigmasterol with the molecular formula C29H480

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Garcinia cowa, Steroid, Stigmasterol
Subjects:	Q Science > QD Chemistry > QD241-441 Organic chemistry
Divisions:	08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1)
Depositing User:	Mrs Furika Furika
Date Deposited:	16 Mar 2022 01:23
Last Modified:	16 Mar 2022 01:23
URI:	http://repository.unsri.ac.id/id/eprint/66165

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