cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Yulia Eka Putri
Contact Email
yuliaekaputri@sci.unand.ac.id
Phone
+6282169596021
Journal Mail Official
jurnalkimiaunand@sci.unand.ac.id
Editorial Address
Jalan Kampus Limau Manih Unand Pauh
Location
Kota padang,
Sumatera barat
INDONESIA
Jurnal Kimia Unand
Published by Universitas Andalas
ISSN : 23033401     EISSN : 30262933     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Jurnal Kimia Unand has been registered with the number online ISSN: 3026-2933 and printed ISSN: 2303-3401. Jurnal Kimia Unand is a peer-reviewed journal published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Sumatera Barat, Indonesia. This journal is devoted to publishing original contributions on chemistry, applied chemistry, chemical engineering, and materials science, both theoretical and experimental studies. Among the research areas of interest are inorganic and organic, especially in developing materials with novel and/or valuable properties. Initially, J. Kim. Unand published articles in 2012, Volume 1. Number 1. November 2012 with a printed ISSN;2303-3401. This journal publishes 4 issues in 1 year and does not yet have an online journal system in the publishing process. This journal aims to publish the articles of undergraduate students of the Chemistry Department, Faculty of Mathematics and Natural Sciences, Andalas University, as one of the graduation requirements. In 2022, J. Kim. Unand initiated using OJS with an online ISSN, and the publishing frequency is two issues per year, in May and October. The criteria of the submitted article cover the following types of articles as follows: Communications. Research articles. Review articles. The scope of this journal includes: Organic synthesis and natural product chemistry Materials synthesis and characterization Synthesis of organic and inorganic compounds Theoretical and computational chemistry Fabrication, development, and validation of analytical methods Food and medicinal chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 41 Documents
 1   2   3   4   5 
Degradation of Remazol Yellow FG by Sonolysis and Photolysis with TiO2/Active Carbon Rice Husk (TiO2/AC) Catalyst and Analysis Using Spectrophotometer UV-Vis Safni; Putri, Anggi Nabila; Deswati, Deswati; Zilfa, Zilfa
Jurnal Kimia Unand Vol. 13 No. 2 (2024): November 2024
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.13.2.34-40.2024

Abstract

Remazol Yellow FG is one of the dyes that are often used in the textile industry because it is accessible and reasonably priced. The non-biodegradable dyes produce waste and inhibit sunlight from passing through the water. In this study, we performed Fourier Transform Infrared (FTIR) to characterise the activated carbon of rice husk and TiO2/activated carbon rice husk (TiO2/AC) using Diffuse Reflectance Spectroscopy UV-Vis (DRS UV-Vis). Remazol Yellow FG was degraded by using sonolysis and photolysis under UV ray (λ = 254 and 365 nm) and visible ray. We performed the experiments using a variety of variables which consist of catalyst dosage (10–50 mg), contact time (1–6 hours), catalyst type (AC, TiO2 and TiO2/AC), lamp type (365 nm, 254 nm and visible lamp) and initial Remazol Yellow FG concentration (10–30 mg/L) to determine the degradation percentage. We found that the addition of TiO2/AC catalyst increased the degradation percentage of Remazol Yellow FG from 6,86% to 52,62% using sonolysis and 8,34% to 95,02% using photolysis. Hence, we concluded that TiO2/AC catalyst from rice husk could be an effective catalyst for the Remazol Yellow FG degradation.
Analisis Senyawa Metabolit Sekunder dari Ekstrak Daun Mengkudu (Morinda Citrifolia L.) serta Uji Aktivitas Antibakteri dan Antijamurnya Norman Ferdinal; Miftahul Jannah; Afrizal
Jurnal Kimia Unand Vol. 14 No. 1 (2025): May 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.1.1-10.2025

Abstract

Noni is one of the medicinal plants that thrives in Indonesia and used as a traditional medicine. Noni leaf extract is widely reported to possess bioactivities such as antioxidant, anti-inflammatory, and antimicrobial properties. In this study, the extraction of noni leaves was carried out using a multistage maceration method with hexane, ethyl acetate, and methanol as solvents. The extracts were identified for their secondary metabolites and tested for antibacterial activity against S. aureus and E. coli, then antifungal activity against C. albicans using the disc diffusion method. The results showed that the hexane extract contained secondary metabolites including alkaloids, steroids, and coumarins, while the ethyl acetate and methanol extracts contained phenolics, flavonoids, alkaloids, steroids, and coumarins. In antibacterial testing, the three extracts exhibited varying potency against the test bacteria, with hexane extract showed the best results against S.aureus bacteria with an inhibition zone of 14.5 mm and ethyl acetate extract against E.coli bacteria with an inhibition zone of 10.28 mm. In antifungal testing, only ethyl acetate extract had an antifungal activity with an inhibiton zone of 9,77 mm.
Kajian Fitokimia, Kandungan Fenolik dan Flavonoid Total, serta Aktivitas Antioksidan Ekstrak Buah Rimbang (Solanum torvum Sw.) Afrizal Itam; Natasya Dwi Putri; Winda Hardani; Suryati
Jurnal Kimia Unand Vol. 14 No. 1 (2025): May 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.1.11-16.2025

Abstract

Solanum torvum Sw is one of the medicinal plants which is utilized by the community as a food ingredient and herbal medicine. The aims this study is to determine of secondary metabolite compounds, total phenolics and flavonoids content, and antioxidant activity using DPPH method from S. torvum fruit extracts. The results show that S. torvum contains secondary metabolite compounds involves flavonoids, phenolics, steroids, saponins, alkaloids and coumarins. Total phenolic content of hexane, ethyl acetate and aqueous fractions were 49.0, 72.7 and 45.0 mg GAE/g sample, respectively. Meanwhile, total flavonoid content of hexane, ethyl acetate and aqueous fractions were 53.8, 199.2 and 57,7 mg QE/g sample, respectively. Antioxidant activity that expressed with IC50 value were categorized as very powerfull antioxidant to DPPH for hexane and ethyl acetate fractions IC50 37.12 and 2.36 mg/L), while aqueous fraction was categorized strong activity (IC50 84.9 mg/L)
PEMANFAATAN ZnO/ZEOLIT UNTUK DEGRADASI AIR GAMBUT MENGGUNAKAN METODE OZONOLISIS DAN PENGARUH TERHADAP KADAR BESI Zilfa, Z.; Yulizar Yusuf; Joya Patricia Ambri
Jurnal Kimia Unand Vol. 14 No. 1 (2025): May 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.1.17-23.2025

Abstract

Peat water is one of the surface water sources that is difficult to utilize because it has poor quality with high Organic content (Humic Acid and Fulvic Acid), and Inorganic such as Iron. The application of the Advanced Oxidation Process (AOP) method using an ozone generator can be used in the degradation of peat water, to obtain effective degradation results, a ZnO/Zeolite catalyst is added. This study aims to determine the effect of ZnO/Zeolite catalyst utilization on peat water degradation by Ozonolysis method on Fe, COD, BOD, Nitrite, and Nitrate levels, and TSS values. The parameters tested included determining the optimum conditions for peat water degradation on Fe. The results obtained from the degradation process with ozone is for 15 minutes using ZnO/Zeolite as much as 0.2 grams, peat water sample volume of 20 mL. After the degradation process was carried out at optimum conditions, the Fe content was found to be 0.11 mg/L. The results of the test parameters were within the limits of the quality standards used. Based on these data, it can be said that the decrease in Fe metal concentration values in peat water by ozonolysis is more effective with the addition of ZnO/zeolite catalyst at optimum conditions.
Influence of Calsination Temperature on Zeolite Synthesis from Non-Hazardous Wastes and Its Application as an Adsorbent of Mn Metal Ion Septiani, Upita; Syukri; Mia Yeliandri; Safni; Zilfa
Jurnal Kimia Unand Vol. 14 No. 1 (2025): May 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.1.29-35.2025

Abstract

In this research, zeolite material was synthesized by hydrothermal method using non- hazardou waste of fly ash as the raw material at low crystallization temperatures of 70oC with seawater as solvent. The effect of calsination temperature on synthesis of zeolite was studied, and the ability of synthesized zeolite to adsorb Mn metal ion in aqueous solution was also investigated. The synthesized zeolite was characterized by Fourier Transform Infra-Red (FT-IR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM-EDS), and Surface Area Analyzer (SAA). Based on the results of XRD, the type of zeolites produced from the synthesized zeolite are zeolite X and sodalite. The synthesized zeolite was then tested for the adsorption of Mn metal ion, using atomic absorption spectrophotometer (AAS) and it was found that the zeolite material synthesized calcined 550oC had the highest adsorption capacity compared to other synthesized zeolite materials, where the maximum adsorption was 192,31 mg/g.
Flavonoid, Phenolic and Antioxidant Content in Several Parts of the Artemisia Plant Yefrida; Yola Tsurayya Putri; Refilda
Jurnal Kimia Unand Vol. 14 No. 1 (2025): May 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.1.24-28.2025

Abstract

Free radicals can cause damage to cells in the body. This can be prevented or treated by using substances that are antioxidants. Artemisia plants (Asteraceae family) are one of the potential sources of natural antioxidants. This study was conducted to determine the content and correlation of flavonoids, phenolics and antioxidant activity of leaves, stems and roots of four types of Artemisia genus plants. The method used for the determination of total flavonoid content was the AlCl3 method and the Folin-Ciocalteau method for the determination of total phenolic content. Antioxidant activity was determined by DPPH methods. Based on this study, with the exception of Artemisia vulgaris plants, the antioxidant activity was determined by DPPH and MPM methods., which had the highest quantity in the roots, the leaves contained the highest levels of flavonoids and total phenolics relative to other sections. The data obtained were further tested with ANOVA which showed a significant difference between flavonoid content, phenolic content, and antioxidant activity with plant type and plant part.
Isolasi dan Karakterisasi Senyawa Triterpenoid dari Ekstrak Etil Asetat Daun Mengkudu (Morinda Citrifolia L.) Ferdinal, Norman; Fitri Khairuni; Suryati
Jurnal Kimia Unand Vol. 14 No. 2 (2025): November 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.2.1-7.2025

Abstract

Morinda citrifolia L., commonly known as the Noni plant, is a plants from the Rubiaceae family that can be found in Indonesia has various benefits. Traditionally, noni is often used as a cough medicine, flu, pain, hypertension, malaria, anthelmintic, and diarrhea. The purpose of this study is to isolate and characterize triterpenoid compounds from ethyl acetate extract of noni leaves. The isolation process was carried out by liquid vacuum chromatography and column chromatography. The compound was obtained in the form of white solids as much as 0,0038 g with a melting point of 233 – 235 oC. This compound identified on the TLC plate using the Liebermann-Burchard (LB) reagent which produced a single purple spot. The results of UV spectrophotometry characterization obtained a spectrum with λmax = 292 nm, indicating an n→π* electron transition. The IR spectrum shows the presence of the O-H functional group at a wavelength of 3853,94 cm-1, 3742,55 cm-1 and 3613,18 cm-1. the C-H functional group at wave number 2922,32 cm-1, the C=O functional group at wave number 1690,13 cm-1 and the C-O group at wave numbers 1033,12 cm-1. The absorption of the geminal dimethyl group, which is characteristic of triterpenoid compounds at 1454,77cm-1 dan 1376,97 cm-1.
Pengaruh Degradasi Pelumas Bekas Menggunakan Katalis Zno/Zeolit terhadap Kandungan Mg dan Na secara Fotolisis Zilfa, Z.; Yusuf, Yulizar; Hanifah Adhisa
Jurnal Kimia Unand Vol. 14 No. 2 (2025): November 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.2.15-24.2025

Abstract

Every year the number of car users has increased significantly, leading to an increase in used lubricant waste. Used lubricants are the result of oil that has been subjected to engine friction, combustion residue and dust. As a result, the effectiveness of the lubricant decreases, and if left for a long time, these contaminants can turn into harmful abrasive particles. The purpose of this study is to see the effect of using ZnO/Zeolite catalysts in degrading used lubricants on the reduction of Mg and Na content by photolysis. Analysis of Mg and Na metal content in used lubricants was carried out using Atomic Absorption Spectrophotometry (AAS). The results of this study showed that the degradation process through photolysis lasted for 15 minutes with the utilization of 0.4 grams of ZnO/Zeolite, and the volume of used lubricant samples was 10 mL for Mg and Na metals. After the degradation process was carried out under optimal conditions, the percentage of metal degradation of Mg reached 84.407% and Na 78.155%. Analysis of used lubricants before and after the degradation process was carried out using FTIR and UV-Vis Spectrophotometer, which showed a change in the spectrum, characterized by a shift in wave numbers, which indicated that the degradation had been successfully carried out. The results of catalyst characterization using FTIR and XRD showed that there was no change in the structure of ZnO/zeolite.
Electrocoagulation of Rhodamine B Dye Using Zinc Electrodes Refinel; Sari, Berliana Mayang; Emriadi
Jurnal Kimia Unand Vol. 14 No. 2 (2025): November 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.2.32-35.2025

Abstract

The textile wastewater containing Rhodamine B is difficult to degrade naturally and poses serious environmental threats. This study evaluated the effectiveness of electrocoagulation using zinc electrodes for Rhodamine B removal. Variables analyzed were concentration, pH, time, voltage, and electrode distance. Removal efficiency was measured using UV-Vis spectrophotometry at λ 545 nm, while FTIR characterization confirmed molecular changes. The optimum condition was obtained at 75 min, pH 6, 5 V, and 1 cm electrode distance, resulting in 98.68 % removal efficiency. FTIR spectra supported the successful removal of Rhodamine B. This demonstrates that electrocoagulation with zinc electrodes is an effective and eco-friendly method for textile wastewater treatment.
Determination of Flavonoids, Phenolic and Total Antioxidant Content from the Leaves, Stems and Roots of Betel Plants Yefrida; Harsita, Wanda Dwi; Refilda
Jurnal Kimia Unand Vol. 14 No. 2 (2025): November 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.2.25-31.2025

Abstract

Betel (Piper betle L.) is one of the medicinal plants widely used in traditional medicine for its therapeutic properties. This study aimed to determine the levels of total flavonoids, phenolics, and antioxidants in the leaves, stems, and roots of four betel species, namely, Piper betle L., Piper ornatum N.E. Br., Peperomia pellucida (L.) Kunth, and Piper aduncum L. The Total Flavonoid Content (TFC) was measured using the aluminum chloride (AlCl₃) colorimetric method, while Total Phenolic Content (TPC) was determined using the Folin–Ciocalteu method. The antioxidant capacity was assessed by the 2,2-diphenyl-1-picrylhydrazyl (DPPH). The results showed that the highest TFC was found in Peperomia pellucida (L.) Kunth leaves (79.27 ± 1.37 mg QE/g DW), whereas the highest TPC was observed in Piper betle L. stems (23.97 ± 0.04 mg GAE/g DW). The strongest antioxidant capacity was also observed in Peperomia pellucida (L.) Kunth leaves (23.93 ± 0.36 mg AAE/g DW). Correlation analysis revealed a very strong relationship between TFC and antioxidant capacity in leaves (r = 0.9892) and a strong correlation between TPC and antioxidant capacity in roots (r = 0.9745). These findings suggest that the antioxidant potential of betel species is closely related to their secondary metabolite composition, particularly flavonoids and phenolic compounds.

Page 4 of 5 | Total Record : 41

 1   2   3   4   5 

Filter by Year

2022 2025


Reset
Filter By Issues
All Issue Vol. 14 No. 2 (2025): November 2025 Vol. 14 No. 1 (2025): May 2025 Vol. 13 No. 2 (2024): November 2024 Vol. 13 No. 1 (2024): May 2024 Vol. 12 No. 2 (2023): November 2023 Vol. 12 No. 1 (2023): May 2023 Vol. 11 No. 2 (2022): November 2022 Vol. 11 No. 1 (2022): May 2022