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All Journal KOVALEN: Jurnal Riset Kimia Fullerene Journal of Chemistry
Batari, Nirmala Puteri
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Evaluation of Antioxidant Activity of Branch Extract from Pouteria campechiana (Sawo Walanda) Batari, Nirmala Puteri; Setyo Purnomo, Adi; Seviani, Winda
KOVALEN: Jurnal Riset Kimia Vol. 11 No. 1 (2025): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2025.v11.i1.17792

Abstract

The objective of this research was to assess the antioxidant activity of branch extract (Pouteria campechiana) through analysis of bioactive compound content and antioxidant activity. The sample was extracted through maceration, utilizing methanol as the solvent which produced a yield of 6.03 %. The quantity of phenolic constituents in the extract was determined using the Folin-Ciocalteu method, with gallic acid as the standard, yielding a result of 195.22 mg GAE/g extract. The quantity of flavonoid constituents was determined using gallic acid as a standard resulting in a value of 830.5 mg QE/g extract. Antioxidant activity was tested using two methods, namely DPPH and ABTS. The results of the DPPH test showed an inhibition percentage of 91% with an IC50 value of 3,322 ppm, while the ABTS test showed an inhibition of 99% with an IC50 of 2,206 ppm at a concentration of 10,000 ppm. Based on these results, the Pouteria campechiana branch extract has very weak antioxidant activity, suggests a limited potential as natural bioactive compound source.
Synthesis and Physicochemical Characterization of Castor Oil Methyl Ester Batari, Nirmala Puteri; Zetra, Yulfi; Burhan, R.Y. Perry; Firdhausya, Talitha Fitra; Firdausa, Yunita Alfiyati; Putri, Rizka Berliana
Jurnal Kimia Fullerene Vol 10 No 2 (2025): Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v10i2.751

Abstract

The increasing consumption of biodiesel has led to the continued development of biodiesel production using oils that do not compete with food, for example castor oil. This study aims to synthesize and characterize castor oil methyl ester (COME) as biodiesel. The FFA of castor oil is 0.66%, so that a transesterification reaction with methanol using a KOH catalyst can be carried out. The reaction was characterized by Thin Layer Chromatography (TLC) and Gas Chromatography-Mass Spectrometry (GCMS). The highest content of COME is methyl ricinoleate at 65.481%. followed by FFA at 0.4%, a cloud point of -9°C, a pour point of -18°C, and a density at 40°C of 887.2 kg/m3 which is in accordance with SNI. Thus, COME has the potential as a biodiesel candidate.
Co-Authors Firdausa, Yunita Alfiyati Firdhausya, Talitha Fitra Putri, Rizka Berliana R.Y. Perry Burhan, R.Y. Perry Setyo Purnomo, Adi Seviani, Winda Zetra, Yulfi