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All Journal Jurnal Pendidikan dan Konseling Journal of Pharmaceutical and Sciences.
Rifah Alena Rades
Universitas Buana Perjuangan Karawang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Public Health Other

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Review Article: Kadar Antioksidan Dari Tumbuhan Famili Zingiberaceae Dengan Menggunakan Spektrofotometri Uv-Vis Ermi Abriyani; Dyah Kharisma Aryanti; Refriyanti Irma; Rifah Alena Rades; Shofa Khairunnisa
Jurnal Pendidikan dan Konseling (JPDK) Vol. 4 No. 6 (2022): Jurnal Pendidikan dan Konseling: Special Issue (General)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jpdk.v4i6.10697

Abstract

Senyawa yang menghambat reaksi oksidasi dan mengikat radikal bebas serta molekul yang sangat reaktif dikenal sebagai antioksidan. Antioksidan dapat ditemukan diberbagai tanaman dan tumbuhan termasuk tanaman dengan family zingiberaceae. Metode penelitian yang digunakan ialah review article dari beberapa data base google scholar, pubmed, sciencedirect. Antioksidan dapat diidentifikasi serapan maksimumnya dengan menggunakan instrument spektrofotometri uv-vis dengan serapan maksimum pada range 400-750 nm.
Analisis Kandungan Total Fenolik, Flavonoid dan Aktivitas Antioksidan Ekstrak Etanol, Fraksi Syzygium cumini (L) Skells. Himyatul Hidayah; Surya Amal; Rifah Alena Rades
Journal of Pharmaceutical and Sciences JPS Volume 9 Nomor 3 (2026)
Publisher : Fakultas Farmasi Universitas Tjut Nyak Dhien

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/journal-jps.com.v9i3.1762

Abstract

The stem bark of Syzygium cumini (L.) Skeels is known to contain secondary metabolites, particularly phenolic and flavonoid compounds, which function as natural antioxidants by donating hydrogen atoms or electrons to neutralize free radicals, thereby protecting cells from oxidative stress-induced damage. This study aimed to evaluate the total phenolic content, total flavonoid content, and antioxidant activity of the ethanol extract and solvent fractions of S. cumini stem bark. Total phenolic content was determined using the Folin–Ciocalteu method, while total flavonoid content was quantified using the aluminum chloride (AlCl₃) colorimetric assay. Antioxidant activity was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. The results demonstrated that the ethanol extract contained a total phenolic content of 37.41 mg gallic acid equivalents (GAE)/g extract and a total flavonoid content of 29.94 mg quercetin equivalents (QE)/g extract. The antioxidant activity assay revealed that the ethanol extract, n-hexane fraction, and ethyl acetate fraction exhibited IC₅₀ values of 12.30, 92.82, and 21.72 µg/mL, respectively. According to the antioxidant activity classification, the ethanol extract and ethyl acetate fraction exhibited very strong antioxidant activity, whereas the n-hexane fraction showed strong antioxidant activity.
Co-Authors Abriyani, Ermi Dyah Kharisma Aryanti Himyatul Hidayah Refriyanti Irma Shofa Khairunnisa Surya Amal