PENGARUH SUHU PENYIMPANAN DAN PROPORSI TEH HIJAU: BUBUK DAUN KERING STEVIA (Stevia rebaudiana) TERHADAP AKTIVITAS ANTIOKSIDAN MINUMAN TEH HIJAU STEVIA DALAM KEMASAN BOTOL PLASTIK
Abstract: Tea is a product
that is often consumed with hot brewed and drink with the addition of sugar.
Aternative substitution for sucrose is stevia sweetener. Green tea stevia
beverages will be packaged in PET plastic into ready to drink products. This
research is done to determine the effect of storage temperature and proportion
of green tea: stevia dried leaf powder (Stevia rebaudiana) on antioxidant
activity of green tea stevia beverage in plastic bottle packaging. The design
of the study is a Randomized Block Design (RBD) factorial design with two
factors. Factors that will be examined are differences in proportion of green
tea stevia dried leaves powder which consist of five levels (100:0, 92:8,
84:16, 76:24, and 68:32 (w/w) in one gram sample) and storage temperature
consists of two levels (refrigerator temperature (4-5°C) and room temperature
(25-27°C)). The result showed that there where difference effect of total
phenol, total flavonoid, DPPH free radical scavenging activity, iron ion
reducing power on green tea stevia beverage. Total phenols, total flavonoids,
iron ion reducing power, and DPPH Free Radical Scavenging Activity are
70.24-130.60 mg GAE/100 ml; 10.28-14.25 mg CE/100 ml; 27.38-95.24 mg GAE/100
ml; and 77.73-91.99 %. Total phenols, total flavonoids, iron ion reducing
power, and DPPH Free Radical Scavenging Activity during storage at room
temperature are 6.9759.71 mg GAE/100 ml; 2.71-10.44 mg CE/100 ml; 2.09-37.91 mg
GAE/100 ml; and 38-65.84 %. Total phenols, total flavonoids, iron ion reducing
power, and DPPH Free Radical Scavenging Activity during storage at refrigerator
temperature are 28.13-104.13 mg GAE/100 ml; 4.95-42.56 mg CE/100 ml; 2.09-37.91
mg GAE/100 ml; and 42.52-70.63 %.
Kata kunci: teh hijau, stevia, penyimpanan, total fenol, total flavonoid,
kemampuan menangkal radikal bebas DPPH, kemampuan mereduksi ion besi
Penulis: Nerissa Arviana
Tristanto, Dwi Wibawa Budianta, Adrianus Rulianto Utomo
Kode Jurnal: jppertaniandd170750
