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All Journal Jurnal Pendidikan Sains Alchemy : Journal of Chemistry EduChemia: Jurnal Kimia dan Pendidikan Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan J-PEK (JURNAL PEMBELAJARAN KIMIA) JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Sains Natural: Journal of Biology and Chemistry Walisongo Journal of Chemistry JPP (Jurnal Pendidikan dan Pembelajaran) Jurnal Abdimas Berdaya : Jurnal Pembelajaran, Pemberdayaan dan Pengabdian Masyarakat Makara Journal of Science JURNAL TEKNIK INDUSTRI
Kusumaningrum, Irma Kartika
Universitas Negeri Malang
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Journal : Walisongo Journal of Chemistry

 1 
Separation and Determination of Free Fatty Acids in Corn Oil and Palm Oil by Liquid-Liquid Extraction and Acidi-Alkalimetric Titration Rusdi, Hanumi Oktiyani; Kusumaningrum, Irma Kartika; Nareswari, Tsalis Jauza; Fauziah, Putri Nanda; Maharani, Richa Nan; Natasya, Shella
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20461

Abstract

Free Fatty Acids (FFA), which include unsaturated fatty acids like oleic and linoleic acid and saturated fatty acids like palmitic and stearic, are present in most oil compositions. The various negative impacts of FFA require these compounds to be eliminated.  This research aims to separate FFA using Liquid-Liquid Extraction (LLE) and determine the levels of FFA using acid-alkalimetric titration in corn oil and palm oil. FFA extraction was carried out for 4 minutes with a solvent ratio of 9,5 ml diethyl ether + 40 ml ethanol + 0,5 ml water. By adding 1M Na2SO4, re-extraction was carried out for 3 minutes. The results obtained were 0.95% FFA levels in corn oil and 1.26% FFA levels in palm oil. FFA levels of both oils are still below the SNI FFA percentage of 3%; besides that, it is found that the FFA levels in palm oil are higher than in corn oil
Separation and Determination of Free Fatty Acids in Corn Oil and Palm Oil by Liquid-Liquid Extraction and Acidi-Alkalimetric Titration Rusdi, Hanumi Oktiyani; Kusumaningrum, Irma Kartika; Nareswari, Tsalis Jauza; Fauziah, Putri Nanda; Maharani, Richa Nan; Natasya, Shella
Walisongo Journal of Chemistry Vol. 7 No. 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20461

Abstract

Free Fatty Acids (FFA), which include unsaturated fatty acids like oleic and linoleic acid and saturated fatty acids like palmitic and stearic, are present in most oil compositions. The various negative impacts of FFA require these compounds to be eliminated.  This research aims to separate FFA using Liquid-Liquid Extraction (LLE) and determine the levels of FFA using acid-alkalimetric titration in corn oil and palm oil. FFA extraction was carried out for 4 minutes with a solvent ratio of 9,5 ml diethyl ether + 40 ml ethanol + 0,5 ml water. By adding 1M Na2SO4, re-extraction was carried out for 3 minutes. The results obtained were 0.95% FFA levels in corn oil and 1.26% FFA levels in palm oil. FFA levels of both oils are still below the SNI FFA percentage of 3%; besides that, it is found that the FFA levels in palm oil are higher than in corn oil
UTILIZATION OF BAGASSE ASH FOR THE PREPARATION OF SILICA AEROGEL/MgO COMPOSITES THROUGH AMBIENT-PRESSURE DRYING Azhar, Istighfarin Meilidya; Nazriati, Nazriati; Kusumaningrum, Irma Kartika
Walisongo Journal of Chemistry Vol. 8 No. 2 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i2.27564

Abstract

This study presents the preparation of silica aerogel/MgO composites using bagasse ash as a silica source and MgCl₂·6H₂O as the MgO precursor. Sodium silicate was extracted from bagasse ash and converted into silicic acid through ion-exchange treatment. Silica aerogel formation was achieved through gelation, followed by surface modification using TMCS and HMDS. Magnesium oxide was incorporated via co-precipitation with MgCl₂·6H₂O and subsequently stabilized through calcination. The composites were characterized using FTIR, XRD, and BET–BJH analyses. XRD results revealed a hybrid amorphous–crystalline structure, with silica predominantly in the amorphous phase and MgO in the crystalline phase. BET analysis showed a pore volume of 0.50 cm³/g and a specific surface area of 121.99 m²/g, while the pore-size distribution confirmed its mesoporous nature. FTIR spectra indicated the presence of functional groups corresponding to Si–O–Si, Si–C, C–H, and Mg–O, confirming the successful integration of MgO into the silica aerogel framework. These findings demonstrate the successful preparation of silica aerogel/MgO composites from bagasse ash under ambient-pressure drying conditions.
Co-Authors Abdillah Al Farraby Adim Firmansah Agusta Rakhmat Taufani Aman Santoso Anugrah Ricky Wijaya Arabillah, Zulfikar Wildan Aripriharta - Azhar, Istighfarin Meilidya Bayu Kreshna Adhitya Sumarto Ciptawati, Endang Cyntia Nilasari Daratu Kusuma Eviana Putri Deni Ainur Rokhim Dewi Yuliani, Dewi Dian Puspita Sari Estiyawati, Estiyawati Fauziah, Putri Nanda Hanumi Oktiyani Rusdi Indah Nur Pramesti Jayawarsa, A.A. Ketut Kusfianti, Anisa Aulia Kusuma, Muhammad Akbar Ilyas Jaya Maharani, Chariztya Anggita Maharani, Richa Nan Maisulah Muhammad Muchson Munzil Nareswari, Tsalis Jauza Natasya, Shella Nazriati Nazriati dkk. Neena Zakia Noviyanti, Thjiong Angelina Pribadi, Riza Agung Puspa Rahmadina Lestari Putra, Helwani Fuadi Sujoko Putri, Adela Syiddah Salsabila, Arini Satia Nur Maharani Suhadi Ibnu Sumiharni Batubara Surjani Wonorahardjo Syah, Alif Alfarisyi Syavika, Lukluatus Wahyu Setyowati Yismia Ikha Sari Yusron Risqy Maulana