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All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut Jurnal Ilmu dan Teknologi Kelautan Tropis JURNAL KIMIA SAINS DAN APLIKASI Jurnal Penelitian Hasil Hutan Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Jurnal Penelitian Hasil Hutan Makara Journal of Science Digital Bisnis: Jurnal Publikasi Ilmu Manajemen Dan E-commerce Gunung Djati Conference Series Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Chemical Science JURNAL REKAYASA KIMIA & LINGKUNGAN Jurnal Penelitian Hasil Hutan
Mohammad Khotib
Department Of Chemistry, Faculty Of Mathematic And Natural Sciences, Bogor Agricultural University, Darmaga Campus, Fapet Building W2 Lt 4-5, Agatis Street, Bogor 16680; Integrated Laboratory, Bogor Agricultural University, Baranangsiang Campus, Paja
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Other

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Characterization of CMC and Its Effect on Physical Stability and Shelf Life of Psidium guajava Arya Avif Alviansyah; Annisa Zahra Ramadhan; Nisrina Azhaar Athaya; Suci Nuraiza; Silvi Permata Defisna; Ibnu Hibban Tasman; Mohammad Khotib
Indonesian Journal of Chemical Science Vol. 14 No. 3 (2025): Indonesian Journal of Chemical Science
Publisher : Prodi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v14i3.25250

Abstract

Psidium guajava has a high content of vitamin C as an antioxidant that is easily damaged. One way to make it stable with stabilizers in the form of hydrocolloids, which are commonly used is carboxymethyl cellulose (Na CMC). The study aims to determine the effect of CMC addition on guava juice drinks with variations in temperature and storage duration and determine the shelf life. Methods include characterization of CMC (water content, organoleptic and viscosity, pH, NaCl content and purity). Guava juice beverage formulation was made by varying CMC concentration (organoleptic, viscosity, pH and vitamin C content). The best result (0.5% w/b) was continued with temperature treatment of 26°C and 16°C, and observation for 25 days. The results showed that CMC had a purity of 98.54% with NaCl of 1.46% and other results showed that it met the SNI/FAO requirements. The test of CMC addition proved to be able to stabilize the juice based on the viscosity of each treatment, but reduced the level of acidity at 16°C. The 26°C treatment changed color and odor on day 10 while at 16°C it lasted until day 20. Vitamin C content showed that on days 10-15 the treatment stored at 26°C decreased to 0.1 mg/g while at 16°C it was stable until day 25. Determination of shelf life using a mathematical model of degradation kinetics.
SINTESIS NANOPARTIKEL Fe₂O₃ DAN PENGARUHNYA PADA PEMBAKARAN CAMPURAN PIROTEKNIK Al/Mg/KNO₃ EVIE LESTARIANA; MOHAMMAD KHOTIB; DEDEN SAPRUDIN; HERU SUPRIYATNO
Gunung Djati Conference Series Vol. 58 (2025): Seminar Nasional Kimia Tahun 2025
Publisher : UIN Sunan Gunung Djati Bandung

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Abstract

Nanomaterial telah banyak mendapat perhatian para peneliti dalam beberapa tahun terakhir, karena sifat fisika dan kimianya yang unik, yang berperan dalam meningkatkan performa dan keamanan penggunaan piroteknik. Tujuan penelitian ini adalah sintesis nanopartikel besi oksida (Fe₂O₃) menggunakan ekstrak daun Salam (Syzygium polyanthum (Wight) Walp.), dan penggunaannya dalam piroteknik Al/Mg/KNO₃. Nanopartikel Fe₂O₃ dikarakterisasi menggunakan Ultra Violet Visible-Diffuse Reflectance Spectroscopy (UV Vis-DRS), Fourier Transform Infra-Red Spectroscopy (FT-IR), X-ray Diffraction (XRD), Particle Size Analyzer (PSA), Scanning Electron Microscope-Energy Dispersive X-Ray Spectroscopy (SEM-EDS), dan Transmission Electron Microscope (TEM). Pengaruh penambahan nanopartikel Fe₂O₃ diuji menggunakan kalorimeter bom. Panas pembakaran piroteknik Al/Mg/KNO₃ hasil pengujian adalah sebesar 6,35 kJ/gr, dan dengan penambahan nanopartikel Fe₂O₃ adalah sebesar 7,12 kJ/gr.
TiO2/ZnO/CuO/HDTMA-Br Composite for Photodegradation of Oxidative Compounds of Used Cooking Oil (UCO): Photodegradation of Free Fatty Acids and Peroxides Pitaloka, Adinda; Sutriah, Komar; Mulijani, Sri; Khotib, Mohammad
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20554

Abstract

Used cooking oil (UCO) contains peroxide and FFA, which can impede UCO processing and lower the quality of downstream products. The majority of pretreatment techniques currently in use have drawbacks, such as excessive chemical use. An alternative that is more successful and efficient is photocatalysis. No research has been conducted on the photodegradation of UCO using TiO2/ZnO/CuO/HDTMA-Br composites. Precipitation was used to create the composite. The TiO2/ZnO/CuO composite has a high crystallinity, specifically 74.54% in the 1 CMC-modified catalyst, according to the characterization results. The spectrum of the synthesized TiO2/ZnO/CuO composite showed the presence of H2O and CO2 groups in addition to the primary groups of TiO2, ZnO, and CuO. Additionally, the 1 CMC modification increased pore volume and surface area. The surfactant-modified composite exhibited a more consistent morphology, as observed by SEM analysis. The best results from photocatalytic testing at different temperatures, times, and surfactant concentrations were obtained at 120 °C for an hour with a surfactant concentration of 1 CMC. These results show that degradation using TiO2/ZnO/CuO photocatalysts can lower the FFA and peroxide contents of UCO by 65% and 59%, respectively, under ideal conditions. This study focuses on FFA and peroxide value parameters as a preliminary investigation into alternative UCO pretreatment solutions. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Alan Frendy Koropitan Ali, Mohamad Makrus Annisa Zahra Ramadhan Anwar Nur Arya Avif Alviansyah Asnil Asnil Bambang Soegijono Chamariyah Chamariyah Daniel P.O Laia Daniel P.O Laia Deden Saprudin Dedri Syafei Defrizal, Muhammad Denar Zuliandanu Domu Simbolon Eriza, Nurul EVIE LESTARIANA Fadli Fakhrullah Fahrizal Hazra Fatika, Siti Gina Libria Nadjamoeddin Gustan Pari Gustan Pari Hartanto, Mochamad Tri Heru Supriyatno Ibnu Hibban Tasman Ida Ayu Putu Sri Widnyani Kevin Setiawan Komar Sutriah Kusumaningsih, Alvianita Mas'ud, Zainal Alim Mas’ud, Zainal Alim Mustaruddin Nasrudin, M Fikry Nisrina Azhaar Athaya Noviyan Darmawan Nurmutia Sari Pitaloka, Adinda Purwantiningsih Sugita Putri Permatasari Putri Permatasari, Putri Samsul Bahri Santiyo Wibowo Santiyo Wibowo Shinya Takahashi Silvi Permata Defisna Sri Mulijani Subastiar, Ian Subijanto Subijanto Suci Nuraiza Sugesti, Rahmawita Takeno Akiyoshi TATI NURHAYATI Tetty Kemala Tri Prartono Tun Tedja Irawadi Zainal Alim Mas'ud Zainal Alim Mas’ud Zainal Alim Mas’ud Zainal Alim Mas’ud