(Zolghadri, et al., 2019). Diphenyl picrylhydrazin
(DPPH) compound is a free radical that is stable in
aqueous or methanol solution and has a purple color
(indicated by the absorption band in the methanol
solvent at a wavelength of 515-520 nm). The DPPH
has properties that are sensitive to light, oxygen, and
pH, but are stable in the form of radicals so that it is
possible to measure an accurate antioxidant activity.
The antioxidant compounds will release hydrogen
atoms to form radical antioxidant compounds. The
DPPH which is a free radical that reacted with
antioxidant compounds to form non-radical DPPH
(Widowati, et.al., 2016). Mini rose showed the
greater antioxidant activity in the ferric reducing
antioxidant power (FRAP) and DPPH tests before
digestion in vitro and together with cosmos as a
source of phenolics with good antioxidant activity (de
Morais, et.al., 2020). Dry rose tea can be used as a
functional food to be a source of natural antioxidants
(Kart & Çağındı, 2017).
Previous studies have shown that phytochemical
compounds contained in Rosa Damascena flower
petals consist of alkaloids, flavonoids, tannins,
carbohydrates, and amino acids (Tatke, Satyapal,
Mahajan & Naharwar, 2015). It has also been found
that rose petal extract contains high anthocyanins,
flavonoids, polyphenols (Lee, et.al., 2018). Unlike
the results of the phytochemical tests in this study,
where the rose petals also contain triterpenoids and
terpenoids.
Measuring the effectiveness of a compound in
biological or biochemical functions capable of
inhibiting the oxidation process by 50% (IC
50
) was
classified in several groups including <50 µg µg per
milliliter (very strong); 50-100 µg µg per milliliter
(strong); 101-150 µg µg per milliliter (moderate); >
150 µg µg per milliliter (weak) (Budaraga, Marlida &
Bulanin, 2016). The IC
50
value of extracted by DPPH
method on black soybean and daidzein was 116.52 µg
/ mL and 109.34 µg / mL, repectively, which means
it has moderate antioxidant strength (Kuswanto,
2018). Ethanol extract of cocoa beans and kojat acid
can be used as inhibitors of enzymaticrosinase
(Kurniasari, Djajadisastra & Anwar, 2018). Oil
obtained from Nigela Sativa seeds (known as black
cumin) is also often used as an anti-oxidant and anti-
inflammatory (Bordoni, et.al., 2019). Manga waste
(skin, seed coat, seeds) from the Colombian manga
cultivar is a source of phenolic compounds that can
be used as antioxidants and free radical cleaners
(Castro-Vargas et al., 2019).
The antioxidant activity test of Rosa damascena
rose petal extract was using standard ascorbic acid
(iron reducing power test) and showed the highest
antioxidant in the cream formula (Safia, et.al., 2019).
The results show that rose extract has good potential
for cosmetic development. Rose oil has the strongest
antioxidant effect and a mixture of Rose oil, bergamot
and patchouli (RBP) with a volume ratio of 7: 2: 1
produces the strongest antioxidant effect on the
DPPH and ATBS Test [2,2-azinobis (3-
ethylbenzothiazoline-6 sulphonic acid)]
(Wongsukkasem, e.al., 2018). In that study also found
that rose oil and bergamot have an antityrosinase
activity around 28 ± 14.2% and 21 ± 10.7%.
However, the study did not specifically explain
whether there were differences in antioxidant
concentrations between the base and rose petals.
2 METHOD
This research is an experimental laboratory study
with data collection (random sampling) using
samples of rose extract and receptacle. The study was
conducted from July-September 2019 at the
Biomolecular Laboratory and Biomedical Research
Center (Aretha Medika Utama). The sample used was
a rose obtained from the Source Seed Management
Unit, Research Institute for Miscellaneous Plant
Flowers in Malang and has gone through a process of
determination. Rose was washed and dried in the sun
to dry milled and extracted by maceration technique
using 70% ethanol solvent for 3 days at room
temperature. Next, the marinade was filtered to
separate the filtrate and the residue. The obtained
filtrate was evaporated with
amotor unit that rotates
the evaporation flask in 50
celcius degrees, so that a
solid extract was received.
Rose petals has 1400 g net weight, simplicia
powder of rose petals was 250 grams and the basic
wet weight of rose flower was 700 g processed into
simplicia powder, base of rose flowers about 90
grams each dissolved in 70% ethanol for 3 days by
maceration method, so the extract of rose petal about
88.56 and 2.72 grams of rose base extract.
The tools and materials used in the
phytochemical, DPPH trapping, and tyrosinase tests,
respectively, are given in Table 1. Phytochemical
tests are used to identify phenol compounds, steroids
/ triterpenoids, saponins, tannins, terpenoids,
flavonoids, and alkaloids found in the lids, and bases
roses.
Identification of phenol was carried out by
dissolving extracts of petals and rose base 10 mg in
ddH2O about 5 ml then adding 500% FeCl
3
solution
about 500 µl. It is known that the sample solution
contains phenol group compounds if one of the