AKTIVITAS ANTIOKSIDAN SERTA PENETAPAN KADAR b-KAROTEN, FLAVONOID DAN FENOL TOTAL EKSTRAK ETANOL LABU KUNING ( Cucurbita moschata, (Duch.) Poir)

  • Anggreni N
  • Mulyaningsih S
  • Saiful Bachri M
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Abstract

Yellow pumpkin (Cucurbita moschata) is a horticultural plant belonging to the Cucurbitaceae family. Yellow pumpkin fruit contains polysaccharides, various vitamins (including β-carotene, vitamin A, vitamin B2, tocopherol, vitamin C, and vitamin E). The abundant β-carotene in yellow pumpkin fruit has been proven to have activity in combating the negative effects of free radicals. This study aimed to determine the levels of β-carotene, total flavonoids, total phenols, and antioxidant activity in yellow pumpkin fruit (Cucurbita moschata) extracted using the maceration method with 96% ethanol solvent. The extract was qualitatively tested using thin-layer chromatography (TLC) and quantitatively tested using a UV-Vis spectrophotometer. Antioxidant activity was performed using DPPH method. The total flavonoid content in the yellow pumpkin fruit extract was 1.8 ± 0.025 mgQE/g extract, and the total phenol content was 13.9 ± 0.04 mg GAE/gram extract. Meanwhile, the β-carotene content was 16.99%, and the antioxidant activity of the yellow pumpkin fruit extract resulted in an IC50 value of 12.13 ppm, which can be classified as a very strong antioxidant.Labu kuning merupakan tanaman holtikultura yang termasuk dalam famili Cucurbitaceae. Buah labu kuning (Cucurbita moschata, (Duch.) Poir)  mengandung polisakarida, berbagai jenis vitamin (termasuk β-karoten, vitamin A, vitamin B2, tokoferol, vitamin C, dan vitamin E). Senyawa β-karoten  yang melimpah dalam buah labu kuning terbukti memiliki aktivitas dalam melawan dampak negatif dari radikal bebas. Penelitian ini bertujuan untuk mengetahui kadar β-karoten, flavonoid total, fenol total dan aktivitas antioksidan pada buah labu kuning (Cucurbita moschata) yang di ekstraksi dengan metode maserasi menggunakan pelarut etanol 96%. Hasil ekstraksi dilakukan uji kualitatif menggunakan metode kromatografi lapis tipis (KLT) dan uji kuantitatif menggunakan spektrofotometer UV-Vis. Aktivitas antioksidan diuji menggunakan metode DPPH. Kadar flavonoid total pada ekstrak buah labu kuning adalah 1,8 ± 0,025 mgQE/g ekstrak dan kadar fenol total 13,9 ± 0,04 mg GAE/gram ekstrak. Sedangkan kadar β-karoten adalah sebesar 16,99% dengan hasil aktivitas antioksidan pada ekstrak buah labu kuning didapatkan nilai IC50 sebesar 12,13 ppm yang dapat digolongkan sebagai antioksidan dengan kategori sangat kuat.

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Anggreni, N., Mulyaningsih, S., & Saiful Bachri, Moch. (2025). AKTIVITAS ANTIOKSIDAN SERTA PENETAPAN KADAR b-KAROTEN, FLAVONOID DAN FENOL TOTAL EKSTRAK ETANOL LABU KUNING ( Cucurbita moschata, (Duch.) Poir). Jurnal Insan Farmasi Indonesia, 7(3), 345–355. https://doi.org/10.36387/jifi.v7i3.2221

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