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All Journal VALENSI BIOTIK: Jurnal Ilmiah Biologi Teknologi dan Kependidikan KOVALEN: Jurnal Riset Kimia Jurnal Pendidikan Kimia (JPKim) Indonesian Journal of Pure and Applied Chemistry Jambura Journal of Chemistry
Boima Ramses Situmeang
Departmen Of Chemistry, Sekolah Tinggi Analis Kimia Cilegon, Banten, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science

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Journal : KOVALEN: Jurnal Riset Kimia

 1 
Antioxidant Potential of Ethanol Extract from Mango Parasite (Dendrophthoe petandra) to Maintain Crude Palm Oil (CPO) Quality Ninik Triayu Susparini; Rohmatulloh; Boima Situmeang; Isna Lailatusholihah; Siti Rohmiyati
KOVALEN: Jurnal Riset Kimia Vol. 8 No. 2 (2022): 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.2022.v8.i2.15954

Abstract

The present study aimed to determine the effectiveness of adding natural antioxidants from ethanolic extract of mango parasite (Dendrophthoe petandra) to oxidation stability of crude palm oil (CPO) during storage. The parameters tested were levels of free fatty acid (FFA), acid values, and deterioration of bleachability index (DOBI). The antioxidant activity of D. petandra extract obtained was IC50 of 6.369 ppm. Concentrations of D. petandra extract range from 200 to 1000 ppm. Based on the results, the ethanolic extract of D. petandra was able to reduce the FFA and acid value and increase the DOBI compared to the negative control. The lowest FFA levels and acid numbers were obtained from samples with addition of 1000 ppm natural antioxidants with FFA of 4.2% and acid value of 7.4 mg KOH/g, while the DOBI value increased to 1.300.
Penurunan Logam Fe dan Co Pada Kerang Hijau (Perna viridis) dengan Metode Perendaman Larutan Belimbing Wuluh: Reduction Fe and Co Metals in Green Mussels (Perna viridis) by Soaking in Starfruit Solution Holisha Widiyanto; Hafidz Al Asad; Sriwijayanti; Dian Susvira; Boima Situmeang
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 3 (2023): December 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.2023.v9.i3.16586

Abstract

Green mussels with the Latin name Perna viridis are an animal that lives in the ocean and is a type of shellfish that is widely consumed by the public. Along with time, the emergence of factories that can pollute the oceans can cause contamination of marine life in it, one of the pollutants is the heavy metals of Fe and Co. The accumulation of heavy metals Fe and Co in green mussels can be toxic to people who consume them. This study aims to determine the concentration of heavy metals Fe and Co in green mussels before and after immersion in starfruit solution. Tests for immersion of the starfruit solution were carried out at 15, 30, and 45 minutes, then the destruction results were analyzed using inductively coupled plasma (ICP) with the calibration curve method. The Fe content in the green mussel sample before treatment was 2.946 mg/kg and the Co content in the green mussel sample before treatment was 2.6081 mg/kg. After soaking in starfruit solution for 15, 30, and 45 minutes, the Fe metal was 1.572 mg/kg, 1.275 mg/kg, and 1.035 mg/kg and the Co metal was 1.572 mg/kg, 1.275 mg/kg, and 0.683mg/kg. Research of immersing starfruit solution with soaking for 15, 30, and 45 minutes is effective in reducing levels of heavy metals Fe and Co in green mussels. The highest reduction was observed during a 45-minute immersion, with a decrease of 64.87% for Fe and 73.81% for Co, respectively.
Co-Authors Achmad Rante Suparman, Achmad Rante Afif Hidayatul Mustafid Afif Hidayatul Mustafid Ahmad Rifa’i Apriani Sulu Parubak Apriani sulu parumbak Ari Widiantoro Dian Susvira Dikdik Kurnia Fauzan Amin Firman Rezaldi Hafidz Al Asad Holisha Widiyanto Ibrahim, Agus Malik Ika Agustia Umami Indah Permata Yudha Isna Lailatusholihah Micha Mahardika Mieke H Satari Moh Adam Mustapa Muhammad Mutfi Amin Shidqi Murtihapsari, Murtihapsari Nurhayati Bialangi Radite Yogaswara Rohmatulloh Saronom Silaban Siti Rohmiyati Sri Agustina Sriwijayanti Susparini, Ninik Triayu Tati Herlina Tati Herlina Weny Nuraeni Yasmiwar Susilawati Yeyen Maryani Yuszda K. Salimi