PEMANFAATAN EKSTRAK KULIT BUAH NAGA MERAH (Hylocereus polyrhizus) SEBAGAI SENYAWA CHEMOSENSOR
The utilization of the extract of red dragon fruit (Hylocereus polyrhizus) peel as a chemosensor compound has been investigated. Isolation of betacyanin pigment compounds from red dragon fruit peel was carried out by maceration method using ethanol 95%. Extract was then identified with various eluen...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2014
|
| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/130426/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=70848 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Universitas Gadjah Mada |
| Summary: | The utilization of the extract of red dragon fruit (Hylocereus polyrhizus)
peel as a chemosensor compound has been investigated. Isolation of betacyanin
pigment compounds from red dragon fruit peel was carried out by maceration
method using ethanol 95%. Extract was then identified with various eluents using
Thin Layer Chromatography (TLC) and analyzed by spectrophotometer UV-Vis.
Chemosensor tests were conducted by observing the color changes occured in
betacyanin extract as the affect of pH solution, specific anions, and some other
base compounds. Application to detect the deterioration of fish meat was also
investigated in this study.
The result revealed that betacyanin extract was red viscous liquid. The best
eluent used for separation was acetonitrile:trifluoroacetic acid (TFA) (9.9:0.1)
indicating the presence of three stains on the TLC plate. Based on the result of
UV-Vis spectra, the appearance of betacyanin compounds was identified in the
extract with maximum peak at a wavelength of 538 nm. The concentration
betacyanin in this extract was obtained at 13.87 ± 1.07 mg from 100 g peel of red
drasgon fruit. The color changes of betacyanin extract showed that its pigmen
compound could act as a chemosensor compound for the titration indicator of
weak acid-strong base, sensor for cyanide, carbonate, sulfur anion, ammonia and
triethylamine as well as a reagent detector for fish meat deterioration. Betacyanin
compounds could be used as a cyanide anion sensor with a limit detection of 5000
ppm and saturated carbonate anion. The betacyanin compounds have also been
used to make paper indicator for acid-base and anion sensors. The paper indicator
was more effective than liquid form for detection of cyanide anion. |
|---|