IDENTIFIKASI DAN UJI KUALITAS PIGMEN KULIT BUAH NAGA MERAH (HYLOCAREUS COSTARICENSIS) PADA BEBERAPA UMUR SIMPANDENGAN PERBEDAAN JENIS PELARUT

Abstract

An alternative excavation of natural materials that could potentially be used as a substance
dyes, continue to be made, including the skin of red dragon fruit. Because the red dragon fruit lately
a lot of public interest, skin which amounts to 30-35% is often just discarded as waste only.
In an effort to use the red dragon fruit peel waste that is not optimal, to increase the economic
value of the skins of red dragon fruit and power use for the community.
The goal is to mengetehaui type of pigment and pigment quality of dragon fruit red on some
shelf with different types of solvents.
This research used Randomized Design Group (RAK) Factorial consisting of two factors I;
comprised of over 4 levels; factor II consisted of 3 level. Factor I: The Fruit Store (S), fresh (day
0), the shelf life of fruit 2 days, 4 days and 8 days, whereas the second factor: the type of solvent
(L), namely aquades; combination aquades and citric acid (9:1), and a combination Eeanol 1N and
citric acid (9:1).
The results showed that the skin of red dragon fruit (Hylocereus costaricensis) containing
anthocyanin type ramnosil sianidin 3-glucoside 5 - glucoside, based on Rf values (retrogradation
factor) of 0.36 to 0.38 and maximum absorbance at a wavelength with ë = 536.4 nm. Combination
treatment S2P2 (the shelf life of fruit 4 days with solvent water and citric acid) produce anthocyanin
pigments of red dragon fruit skin with the best quality, with a pH value of 1.91; the brightness (L)
25.60; level of redness (a +) 6.97; the yellow (+ b) 0.50, 0.363 pigment absorbance; levels of
anthocyanin 1.1 mg/100ml; total dissolved solids 66.52% and 10.02% yield.