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All Journal International Journal of Renewable Energy Development JURNAL KIMIA SAINS DAN APLIKASI Alchemy : Journal of Chemistry Jurnal Kimia Riset Science and Technology Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Communications in Science and Technology Chemistry Indonesian Journal of Chemical Research Kumawula: Jurnal Pengabdian Kepada Masyarakat Sains dan Matematika Indonesian Journal of Chemical Science and Technology Jurnal Pijar MIPA Unesa Journal of Chemistry Molekul: Jurnal Ilmiah Kimia
Pirim Setiarso
Universitas Negeri Surabaya
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Fabrication of Carbon Paste Electrode Modified with Bentonite Nanoparticles and Titanium Dioxide Nanoparticles for Analysis of Methyl Parabens by Cyclic Voltammetry Hizbullah, Ahmad Jihad; Setiarso, Pirim
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.5949

Abstract

Cosmetics are products of several substances or ingredients with a predetermined time limit. Efforts to extend the time limit of cosmetic use are made by adding preservatives. One preservative that is often used is methylparaben. Methylparaben has been tested using spectrophotometry, voltammetry, and HPLC. In this study, electrode modification was carried out in the voltammetry test to obtain a low detection limit. The purpose of this study was to determine the effect of the working electrode composition of carbon paste, bentonite nanoparticles, titanium dioxide nanoparticles, and paraffin on the best response in the analysis of methylparaben by cyclic voltammetry, knowing the optimum measurement conditions of pH with the best electrode composition in the analysis of methylparaben by cyclic voltammetry. FTIR characterized bentonite nanoparticles to determine vibrations and functional groups, and XRD was performed to determine the phase and particle size. The electrode was made from a mixture of carbon, bentonite nanoparticles, titanium dioxide nanoparticles, and paraffin. The best electrode composition was added with titanium dioxide nanoparticles to obtain a higher peak current. XRD characterization of bentonite nanoparticles showed an average particle size of 43.8155 nm. The result of determining the best electrode composition is 3:2:3:2 with an anodic peak current of 9.6.10-4 A. The best methylparaben measurement at pH seven solution conditions. The latest research shows that carbon paste electrodes modified with bentonite and titanium dioxide nanoparticles can be used for methylparaben analysis.
Cyclic Voltammetry Method for Analysis of Phosphate Concentration in Water Agustin, Qomariyah; Setiarso, Pirim
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.6090

Abstract

Phosphate is a nontoxic element but a limiting element for productivity. Several methods have been established to analyze the phosphate concentration in water. This study aims to analyze phosphate concentration in water using the voltammetry method using cyclic voltammetry. Cyclic voltammetry is an electroanalytical method that measures the current outcome of oxidation-reduction reactions in response to the potential. The current outcome is directly proportional to the phosphate concentration in the solution. The calibration curve was formed from the KH2PO4 standard solution using concentrations of 0.1 mg/L, 0.2 mg/L, 0.4 mg/L, 0.8 mg/L, and 1.6 mg/L. The voltammogram showed that the analyte does not have an anode peak current (Ipa), which means that the analyte solution did not have an oxidation reaction, so the cathode peak current (Ipc) value was used. Based on the calibration curve, the linear regression graph with a straight-line equation is y = -0,00000645632x - 0,000208737 with R2 of 0,99737. Meanwhile, this cyclic voltammetry method was validated by calculating the LOD and LOQ values; the results are 0.1034 mg/L and 0.3134 mg/L, respectively. Hence, based on the analysis of phosphate concentration in water samples, this method works satisfactorily and is suitable for routine analysis because of its advantages.
Potential Analysis of Quercetin and Its Derivatives as Inhibitors of Hendra Virus (HeV) Rosyiidah, Nur Anisa; Setiarso, Pirim; Sanjaya, I Gusti Made
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 7 No. 1 (2024): JANUARY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i1.56448

Abstract

This study aims to determine the inhibitory potential of quercetin and its derivatives on the activity of Hendra virus (HeV) 6BK6 protein with its comparator N-Acetyl-D-[1-13C] Glucosamine. This research was carried out using the molecular docking method in order to obtain information related to binding affinity values, inhibition constants, and amino acid residues in the ligand-receptor hydrogen bonds. It was found that the compound quercetin 3-O-xyloside had the lowest binding affinity among the other compounds, namely -6.92 kcal/mol with an inhibition constant of 8.44 µM. In addition, there are four types of amino acid residues in the ligand-receptor hydrogen bonds including ASP304 (1,90 Ã…), SER301 (2,47 Ã…), ARG191 (3,18 Ã…), and MET188 (4.34 Ã…). In this case it can be concluded that the compound quercetin 3-O-xyloside has been shown to have the potential to inhibit the activity of the HeV 6BK6 protein.
Co-Authors A'yun, Qurrota Agustin, Qomariyah Andianita, Tri Dyah Anggraini Putri, Dhea Ashabul Kahfi Ashabul Kahfi, Ashabul Ayu Ilfiana Buchari Buchari Cahyani, Sinta Anjas Didin Mujahidin Dina Kartika Maharani Eka Candra Saputra Elsa Rishda Hariningtias ERLITA PUTRI, PUPUT Estiningtyas, Indri Wasa Fachrirakarsie, Fadlurachman Faizal Fajrin, Aisyah Rahmatul Fatihah, Vita Ayu Febriyana, Andini Hafidha, Qonita Arky Harsono, Rifanda Viantiano Hery Widijanto Hizbullah, Ahmad Jihad I GUST MADE SANJAYA Ihda Shoumi Nurdini Indah Tri Wahyuni Indah, Rahmalia Indra Noviandri INGGRIANI, FIRMA Khoiriyah, Nuril Kurniawan, Muhammad Ridho Hafid Lenny Yuanita Maria Monica Sianita MAY LUKMANA, KUMININGSIH Monica, Maria Mulyono, Dymarda Indra Santoso Nafisatus Zakiyah Naulia, Kaila Nerry Puspita Sari Nita Kusumawati Nita Kusumawati Nuril Khoiriyah Nurzulla, Weka Firda Rizki Perdana, Raga Agung Putra, Ananta Adita Eka Putri, Marinda Mayliansarisyah Rahayu, Nunik Tri Rahmawati, Khofifatul RAIDAH RUSNADI, WINDA Ramadanti, Awanda Halida Rhamdiyah, Fastabiqul Khairati Rimbi Rodiyana Sova Riska Nur Safitri, Riska Nur Rosyiidah, Nur Anisa Safitri, Rizka Dwi Samik Samik Samik Samik Sanjaya, IGM Sinta Anjas Cahyani Supari Muslim Supari Muslim Suyatno Sutoyo Taufik Hidayatulloh Tukiran Tukiran Wachid, Rochman Wahono Widodo Zahro, Nafisatuz Zakiyah, Nafisatus