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INDONESIA
JURNAL ATOMIK
Published by Universitas Mulawarman
ISSN : 25490052     EISSN : 25490052     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science
Jurnal Atomik (JA) is published twice a year (March and August) by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Mulawarman University. Jurnal Atomik is a media for graduate students of Department of Chemistry to publish their research articles in Chemistry field including Analytical Chemistry, Inorganic Chemistry, Physical Chemistry, Organic Chemistry, and Biochemistry. The research articles that be submitted to Jurnal Atomik have to be approved by Editorial Board and in accordance with the rules of writing approved by Editor of Jurnal Atomik.
Arjuna Subject : -
Articles 208 Documents
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Pemanfaatan Cangkang Telur Ayam sebagai Sumber CaO: Studi Karakterisasi menggunakan Fourier Transform Infrared Spectroscopy (FTIR Marinda Afifatu Zahra; Irfan Ashari Hiyahara; Husna Syaima
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1550

Abstract

This research aims to utilize chicken eggshell waste as a raw material for producing calcium oxide (CaO) through a simple calcination method. Eggshells, which are mostly composed of calcium carbonate (CaCO₃), were calcined at 900°C for one hour. The resulting material was then characterized using Fourier Transform Infrared Spectroscopy (FTIR) to identify the presence of specific functional groups. The FTIR results showed a strong absorption peak at 602.14 cm⁻¹, indicating the presence of Ca–O bonds, which confirms the formation of CaO. However, additional peaks associated with hydroxyl (–OH) and carbonate (CO₃²⁻) groups were also detected, suggesting that some residual Ca(OH)₂ and CaCO₃ remained in the sample. This indicates that the calcination process was not fully complete, and further optimization may be necessary to improve the purity of the CaO obtained.
PENENTUAN NILAI SUN PROTECTION FACTORS (SPF) PADA EKSTRAK DAUN SURIAN MENGGUNAKAN METODE SPEKTROFOTOMETRI UV-VIS Alyani Nur Shadrina; Erwin -; Chairul Saleh
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1552

Abstract

Excessive exposure to ultraviolet (UV) radiation can cause various negative effects on the skin, including erythema, hyperpigmentation, premature aging, and even skin cancer. The use of natural-based sunscreens is considered a safer and more environmentally friendly alternative to synthetic sunscreens. This study aimed to determine the Sun Protection Factor (SPF) of the crude extract and fractions of surian leaves (Toona sinensis (Juss.) M. Roem) using a UV-Vis spectrophotometer based on Mansur's equation. Extraction was carried out by maceration with 96% ethanol, followed by liquid-liquid partition using solvents with different polarities, namely n-hexane, ethyl acetate, and ethanol-water. Phytochemical screening showed the presence of bioactive compounds such as phenolics, flavonoids, quinones, tannins, and steroids, which are known to have photoprotective potential. The SPF test results revealed that the ethyl acetate fraction had the highest SPF value of 34.34 at a concentration of 250 ppm, classified as ultra-protection. The ethanol extract and ethanol-water fraction also showed high SPF values of 31.02 and 24.51, respectively, while the n-hexane fraction had the lowest SPF value. These findings indicate that surian leaves, particularly the ethyl acetate fraction, have promising potential as an active ingredient in natural sunscreen formulations.
PENURUNAN KADAR ASAM LEMAK BEBAS PADA MINYAK JELANTAH DENGAN MENGGUNAKAN ABU KALSINASI DARI BEBERAPA BAHAN ADSORBEN Rafi Firmana Hadyanto; Ritson Purba; Daniel -; Ade Shiva Rizki
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1563

Abstract

Cooking oil has a primary function as a heat transfer medium in food processing. Repeated use of cooking oil can reduce its quality, which is often referred to as used cooking oil. Many people use cooking oil repeatedly to save money without considering the impact. The purpose of this study was to determine the results of refining used cooking oil in terms of free fatty acid (FFA) levels through the adsorption method using calcined ash from several different types of adsorbents, namely chicken eggshells, Tegillarca granosa shells, zeolite, and bricks. Based on the results of the study, the results of the FFA content of the used cooking oil sample were 2.735%. The results of the FFA content of the used cooking oil sample after being adsorbed using calcined ash from chicken eggshells, blood cockle shells, zeolite, and bricks were 0.638%, 0.464%, 1.691%, and 0.921%, respectively. Of the four adsorbent materials, the type of adsorbent obtained is calcined blood cockle shell ash which is the most effective in reducing the ALB levels of used cooking oil samples, which is 83.03%. Then followed by chicken egg shells, which is 76.67%, bricks, which is 66.32%, and commercial zeolite, which is 38.17%.
MINI REVIEW: POTENSI FLORA SULAWESI SELATAN UNTUK SINTESIS NANOPARTIKEL RAMAH LINGKUNGAN Andi Eka Kartika
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1566

Abstract

South Sulawesi harbors a high diversity of plant species, including several endemic taxa with substantial potential for the development of environmentally sustainable nanomaterials. Among emerging approaches, the green synthesis of nanoparticles using plant extracts as bioreducing and capping agents has gained significant attention due to its simplicity, low cost, and alignment with green chemistry principles. This mini-review provides an overview of recent advancements in the biosynthesis of nanoparticles mediated by local and endemic plant species from South Sulawesi. The review highlights the role of phytochemicals in nanoparticle formation, the characterization methods employed, and their potential applications in biomedical, catalytic, and environmental fields. Furthermore, it discusses the current challenges, including standardization of plant extracts, control over nanoparticle morphology, and scalability of the process. The findings emphasize the untapped potential of South Sulawesi flora as a promising biological resource for sustainable nanoparticle synthesis and encourage further interdisciplinary research in this area.
PENENTUAN KOMPOSISI ASAM LEMAK DARI MINYAK BIJI KEPUH (Sterculia foetida Linn.) Jauzaa Lisgia Ramadhandita; Daniel -; Eva Marliana
JURNAL ATOMIK Vol 11 No 1 (2026)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Penelitian ini bertujuan untuk menentukan komposisi asam lemak minyak biji kepuh ( Sterculia foetida Linn.) melalui proses esterifikasi. Minyak diekstraksi dengan maserasi menggunakan pelarut n -heksana dan diubah menjadi metil ester melalui reaksi dengan metanol dan asam sulfat pekat (H2SO3) dalam pelarut benzena. Metil ester yang dihasilkan dianalisis menggunakan Kromatografi Gas-Spektrometri Massa (GC-MS) untuk mengidentifikasi komponen asam lemak baik secara kualitatif maupun kuantitatif. Analisis mengungkapkan tujuh senyawa utama, dengan metil sterkulat (33,39%) dan metil palmitat (24,70%) sebagai konstituen dominan. Profil asam lemak yang diperoleh tidak hanya penting dalam menentukan sifat fisikokimia dan kinerja biodiesel, tetapi juga menawarkan potensi untuk aplikasi dalam formulasi surfaktan berbasis metil ester. Hal ini sangat relevan dalam menentukan nilai Keseimbangan Hidrofil-Lipofil (HLB), yang memengaruhi fungsionalitas dan penerapan industri surfaktan dalam emulsi, deterjen, dan produk kosmetik.
BACTERIAL RESISTANCE FROM FORMER MINING EXCAVATIONS IN LOA BAHU VILLAGE TO HEAVY METALS Pb, Cd, AND Cr Trista Kinanthi Putri Santoso; Winni Astuti; Djihan Ryn Pratiwi
JURNAL ATOMIK Vol 11 No 1 (2026)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Ex-mining lakes are one of the potential sources of bacteria that are resistant to metals. The purpose of this study was to isolate bacteria from the lake in Loa Bahu village as metal bioremediation agents. The research was conducted by taking lake water samples at three different points in Loa Bahu village, Sungai Kunjang, Samarinda. Bacteria were isolated in agar solid media (NA) by streak method using an ose needle and 13 bacterial isolates were taken. Bacteria were selected with heavy metals Pb 100 ppm, Cd 30 ppm, and Cr 30 ppm using agar solid media (NA). The selection results are all bacterial isolates resistant to metal Pb 100 ppm, 6 bacterial isolates resistant to metal Cd 30 ppm, 4 bacterial isolates resistant to metal Cr 30 ppm. The best potential is found in AT 3 bacteria because it is able to grow in all types of metals.
SKRINING FITOKIMIA TERHADAP EKSTRAK ETANOL DAUN SURIAN (Toona sinensis Roem) Andi Deffi Ramadani; Erwin Erwin; Ritbey Ruga
JURNAL ATOMIK Vol 11 No 1 (2026)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v11i1.1574

Abstract

Toona sinensis (Surian) is a species of the Toona genus of the Meliaceae family that is highly resistant to cold weather compared to other Meliaceae families. T. sinensis is widely used as a traditional medicine such as a worm medicine, dysentery, expectorant, as a tonic and can also be used to lower blood sugar and for the treatment of syphilis and many other benefits. Based on previous research, it is known that the content of secondary metabolites found in the surian plant includes limonoids, phytol, flavonoids, essential oils, phenol triterpenoids, and catechins. This study was conducted to obtain T. sinensis leaf extract through a maceration process using ethanol solvent, and phytochemical tests to determine the content of secondary metabolites in it. The extraction results obtained in the form of a dark green isolate, with a mass of 24.82 grams and a yield of 17.98%. Phytochemical testing showed that the ethanol extract of Surian leaves contains secondary metabolite compounds such as alkaloids, steroids, phenolics, and quinones.
FABRICATION AND CHARACTERIZATION OF A CD²⁺ ION SELECTIVE ELECTRODE OF THE COATED WIRE BASED ON POLYVINYL CHLORIDE Tentriati Cahaya; Aman Sentosa Panggabean; Moh. Syaiful Arif
JURNAL ATOMIK Vol 11 No 1 (2026)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

This study reports the fabrication and characterization of a Cd²⁺ ion-selective electrode of the coated wire (ISE) based on PVC with sodium sulfide as the ionophore. The electrode was prepared using the optimum composition of Na₂S:PVC:DOP (0.7 g:0.2 g:0.1 mL) and doped in Cd(CH₃COOH)₂ solution. The results showed a Nernstian slope of 9.5 mV/decade, detection limit of 1×10⁻⁵ M, optimum pH range of 6–7, response time of 20–60 s, and a lifetime of 3 days. FT-IR analysis demonstrated successful electrode characterization via the formation of Cd–S interactions, indicated by the band at 612.75 cm⁻¹. The electrode exhibited good selectivity toward Cd²⁺ over interfering ions (Zn²⁺, Cu²⁺, NO₃⁻, Cl⁻, SO₄²⁻).

Page 21 of 21 | Total Record : 208

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