STABILITAS SENYAWA FENOLIK DALAM EKSTRAK DAN NANOKAPSUL KELOPAK BUNGA ROSELLA PADA BERBAGAI VARIASI PH, SUHU DAN WAKTU
ABSTRACT: The extract which is
still in liquid form, has several weaknesses, such as unstable in enviroment
changes, low flexibility uses and trouble in material handling and
transportation. For these reasons,
nanoencapsulation technique using β-siklodextrin as matrix agent is an
alternative way. The aims of this research were characterization of total
phenols, antioxidant activity of nanoencapsulation and the stability of the
extract as well as nanocapsules against the changes of pHs, temperatures and
boiling times. Nanocapsules of roselle
extract was containing phenol 4,53 + 0,26 mg/g, anthocyanin 2,99 + 0,18 mg/g,
vitamin C 2,77 + 0,04 mg/g and water moisturizer 5,16 + 0,03%, antioxidant activity
49%. Nanocapsules more resistence against
the enviroment changes than the extract itself.
The stability test against the enviroment changes, the nanocapsules form
more stable than the extract. Showed
with the slope of linier regression of nanocapsules form for phenols and
antioxidant activity, respectively were: 0,111; 1,307 lower than the extract :
2,825; 7,634. Nanocapsules more
resistence against temperature and boiling time than the extract itself. The stability test against temperature and
boiling time, the nanocapsules form more stable than the extract. Showed with the slope of linier regression of
nanocapsules for phenols and antioxidant activity respectively were: 1,3315;
0,3162 lower than the extract : 1,5864; 0,5389
Penulis: Ike Sitoresmi M
Purbowati, Khaswar Syamsu, Endang Warsiki, Herastuti Sri
Kode Jurnal: jppertaniandd160927
