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ALCHEMY Jurnal Penelitian Kimia
Published by Universitas Sebelas Maret
ISSN : 14124092     EISSN : 24434183     DOI : -
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology
ALCHEMY Jurnal Penelitian Kimia is a chemistry journal published by Sebelas Maret University, Surakarta. ALCHEMY Jurnal Penelitian Kimia publishes original research articles or review articles in organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry, and environmental chemistry.
Arjuna Subject : -
Articles 307 Documents
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Synthesis of Ni2+/Natural Zeolite by Electro-Ion Exchange I F Nurcahyo; Fitria Rahmawati; Lisa Agustina Nurlaila; Yuniawan Hidayat; Eddy Heraldy; Khoirina Dwi Nugrahaningtyas; Taufiiq-Yap Yun Hin
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.80180.241-245

Abstract

Electro-ion exchange was carried out to synthesize Ni2+/natural zeolite at room temperature using various concentrations of Ni(NO3)2 of 0.05, 0.1, 0.15, and 2.0 M, zeolite wetting times of 0 and 24 hours, electrolysis times of 1, 2, and 3 hours, and voltages of 7.5, 15, and 28.4 V. The amount of Ni2+ that can be impregnated in the zeolite was monitored with Atomic Absorption Spectroscopy (AAS). The Ni2+/zeolite formed was characterized for its total acidity. The optimum conditions for this process are 28.4 V, 3 hours, and 0.1 M Ni(NO3)2. Under these optimum conditions, the Ni2+ content of the natural zeolite was 0.04 mmol/g, with a total acidity of 2.5 mmol/g. The increasing trend in the amount of Ni2+ content matched the trend in the total acidity. The synthesized Ni²⁺/natural zeolite is expected to be applied as a catalyst in reactions such as hydrogenation and hydrocracking.
Formulation and Stability of Miana Leaf Extract Spray Gel with Antioxidant Nelly Suryani; Rosa Adelina; Vivi Anggia; Tania Sabarini; Sabrina Dahlizar; Ofa Suzanti Betha; Estu Mahanani Dhilasari
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.100561.179-190

Abstract

The extract of Miana leaves (Coleus scutellarioides L.) is recognized for possessing potent antioxidant Action. This research aimed to develop a physically stable spray gel incorporating miana leaf extract and to evaluate its antioxidant potential through the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. Three formulations with different proportions of Carbopol and hydroxypropyl methylcellulose (HPMC) were evaluated for stability under room-temperature storage and during cycling tests, with organoleptic characteristics and viscosity as assessment parameters. The extract alone exhibited very strong antioxidant Action (IC₅₀ = 47.71 ppm). In comparison, the spray gel formulations showed IC₅₀ values of 141.18 ppm (FE1, 1%), 113.72 ppm (FE2, 3%), and 80.90 ppm (FE3, 5%), corresponding to moderate, moderate, and strong Action, respectively. Among these, FE2 (3% extract) demonstrated the most favorable physical stability.
Chemical Composition and Aromatherapy-Based Relaxation Potential of Selected Indonesian Herbal Essential Oils Nurina Rizka Ramadhania
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.114348.60-73

Abstract

Aromatherapy, an alternative treatment approach, is gaining popularity in Indonesia due to its ability to provide psychological and physiological relaxation. The use of Indonesian herbal plants, especially Syzygium polyanthum (bay leaf), Camellia sinensis (green tea), Cymbopogon citratus (lemongrass), Lavandula angustifolia (lavender), and Citrus limon (lemon) in aromatherapy has long been recognized for its distinctive, refreshing aroma and diverse secondary metabolites. This scientific literature review is presented to reveal the relationships between the presence and diversity of chemical composition of selected Indonesian herbal plants and various influencing factors, such as plant origin and the extraction method used. The aroma-defining properties of eugenol, geraniol, linalool, citral, and limonene in essential oils, when combined, can synergistically trigger bioactivities, including antioxidant, antibacterial, anti-inflammatory, and relaxing effects. Scientifically, the relaxing effects of aromatherapy are produced through stimulation of the olfactory system, which connects to the limbic system in the brain, including the amygdala and hypothalamus, which are responsible for improving mood and enhancing emotional regulation. Based on this review, the metabolite profile of essential oils plays a role in determining their potential bioactivity, especially in selected herbal plants as sources of natural relaxation therapy.
Organic Waste Management Innovation through Composting Technology with Local Bio-Activators Eka Putra Ramdhani; Hilfi Pardi; Nola Ritha
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.112491.88-94

Abstract

This research is part of a strategic research program in environmental technology and renewable energy focused on climate change mitigation. Organic waste management through composting technology is a strategic approach to reduce waste generation and the potential for methane (CH₄) emissions from anaerobic decomposition. This study aimed to analyze the effectiveness of local microorganism (MOL) bioactivators, namely rice MOL (P1), banana mob MOL (P2), and fruit MOL (P3), in accelerating composting, compared to controls (without the addition of MOL). The results showed that fruit MOL (P3) is the most effective bioactivator for accelerating decomposition and improving compost quality. This treatment achieves the fastest maturity in 40 days with the lowest C/N ratio and the highest macronutrient content (Nitrogen (N), Phosphorus (P), Potassium (K)) compared to other treatments. These findings confirm that the application of local bioactivators can significantly improve the efficiency of campus organic waste management and support environmental sustainability.
Synthesis of Carbamate-Modified Cellulose Biocoagulant from Jengkol (Archidendron pauciflorum) Peel via Crosslinking Method for Lead Removal from Wastewater Alpan Sofyan Tanjung; Rifda Adillah; Muhammad Fajrul Rahman; Yulia Eka Putri
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.102384.246-253

Abstract

Heavy metal pollution poses a serious environmental and health threat. An effective and environmentally friendly solution to mitigate this issue is the use of cellulose-based coagulants derived from jengkol (Archidendron pauciflorum) peel waste modified with carbamates. Cellulose isolated from jengkol peel was successfully modified with carbamate derived from urea through a crosslinking method. The formation of cellulose and carbamate crosslinks was confirmed by Fourier transform infrared (FTIR) spectroscopy, which showed new absorption peaks corresponding to amide (–NH2) and nitrile (CN) functional groups. Morphological observations using a scanning electron microscope (SEM) showed changes in the shape of cellulose fibers after modification with carbamate, where carbamate cellulose exhibited a denser fiber morphology with larger pore sizes. Elemental analysis revealed the presence of nitrogen in carbamate-crosslinked cellulose, indicating that the cellulose has successfully bonded with the carbamate derived from urea. The decrease in heavy metal lead (Pb) concentration in wastewater samples was achieved by adding 1.5 g of carbamate-modified cellulose, resulting in 96.87% Pb removal. These results show that the cellulose-based biocoagulant from jengkol peel waste, modified with carbamate via crosslinking, has been successfully synthesized and significantly reduced the concentration of the heavy metal Pb.
Physical and Chemical Properties of Bacterial Cellulose-Based Bioplastic Innovation from Sago Liquid Waste for Eco-Friendly Secondary Food Packaging Aminah Maryani; Nur Arfa Yanti; La Ode Ahmad Nur Ramadhan; Reza Kurniawan
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.109471.191-199

Abstract

The increasing demand for plastic food packaging has raised concerns over the environmental impact of plastic waste. Previous research has used sago liquid waste as a primary food packaging material, namely, edible coatings on tomatoes and edible films on sausages. However, research on secondary food packaging has not been conducted. The method used in this research involves a series of stages, from synthesizing bacterial cellulose to make bioplastics. The bioplastics were made with bacterial cellulose fermented from sago liquid waste and mixed with varying compositions of carboxymethyl cellulose (CMC), zinc oxide (ZnO), polyvinyl alcohol (PVA), and glycerol. Chemical characteristics, as determined by functional group analysis, showed that bioplastics still exhibited the typical functional groups of bacterial cellulose, as well as additional groups from glycerol, CMC, PVA, and ZnO, indicating the success of chemical structure modification in bioplastics. The crystallinity level of bioplastics also increased with the concentration of the mixture, with the highest crystallinity value of 37.084% in bioplastic sample A4. The physical characteristics of bioplastics, such as transparency, thickness, moisture content, water solubility, water uptake, and water vapor transmission rate, increased with increasing bioplastic mixture.
Determination of Tetracycline Antibiotic Residue Levels in Goldfish (Cyprinus carpio) using High Performance Liquid Chromatography (HPLC) Agung Abadi Kiswandono; Anisa Rahmawati; Yanesta Oxvyena; Purna Pirdaus; Sonny Widiarto; Sutopo Hadi; Rinawati Rinawati
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.90319.138-147

Abstract

The method for determining residual levels of tetracycline antibiotics in goldfish (Cyprinus carpio) was validated using High Performance Liquid Chromatography (HPLC). The HPLC method has advantages, including high accuracy, efficiency, ease of operation, and high selectivity and sensitivity. This research aims to develop a method for determining tetracycline residues and tetracycline levels in goldfish meat obtained from eight markets in Bandar Lampung City. The analytical method carried out was optimized for the composition and flow rate of the mobile phase. Optimization results show a composition of acetonitrile:water = 35:65 and a flow rate of 0.5 mL/minute. The method validation parameters carried out are linearity, precision, accuracy, selectivity, Limit of Detection (LoD), and Limit of Quantitation (LoQ). The linearity results obtained from this research were R2 = 0.9980. This method has repeatability precision with a Relative Standard Deviation (%RSD) value of 1.35%, and reproducibility precision with %RSD values of 0.96% and 1.14%, respectively. The %recovery method value is 101.05%. The LoD and LoQ values for this method are 0.27 and 0.90 ppm. Measurement of tetracycline antibiotic residue levels in carp samples from 8 market locations in Bandar Lampung showed values of 21.77 – 38.58 ppm, with uncertainties of ±0.87 – ±1.42. The method validation results show that the method can be used for routine analysis of tetracycline antibiotic levels in the laboratory.

Page 31 of 31 | Total Record : 307

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