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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 8 Documents
 1 
Search results for , issue "Vol 9 No 1 (2024)" : 8 Documents clear
UJI AKTIVITAS EKSTRAK TONGKOL JAGUNG (Zea mays L.) DAN EKSTRAK DAUN KELOR (Molinga oleifera) Sabrina, Sabrina; Kuncoro, Hadi; Erwin, Erwin
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1364

Abstract

Uji toksisitas ekstrak kasar tongkol jagung (Zea mays L.) dan ekstrak kasar daun kelor (Molinga oleifera) telah dilakukan. Tujuan penelitian ini adalah mengetahui tingkat toksisitas ekstrak kasar tongkol jagung (Zea mays L.), ekstrak kasar daun kelor (Molinga oleifera), dan kombinasi ekstrak tongkol jagung (Zea mays L.) dan daun kelor (Molinga oleifera). Ekstrak tongkol jagung maupun daun kelor diperoleh dengan cara maserasi selama 3 x 24 jam dengan pelarut etanol 96%. Selanjutnya ekstrak kasar diperoleh dengan cara memisahkan pelarutnya menggunakan rotary evaporator. Pegujian toksisitas dilakukan dengan metode Brine Shrimp Lethality Test (BSLT) menggunakan larva udang (Artemia salina L.) Hasil penelitian menunjukkan pada ekstrak kasar tongkol jagung (Zea mays L.) memiliki nilai LC50 282,488 ppm, pada ekstrak kasar daun kelor (Molinga oleifera) memiliki nilai LC50 519,493 ppm, dan pada kombinasi ekstrak kasar tongkol jagung (Zea mays L.) dan ekstrak kasar daun kelor (Molinga oleifera) (perbandingan 1:1) memiliki nilai LC50 1191,146 ppm. Kesimpulan dari penelitian ini yaitu berdasarkan nilai LC­50 yang diperoleh pada ekstrak kasar tongkol jagung (Zea mays L.) dan ekstrak kasar daun kelor (Molinga oleifera) dapat dikategorikan toksik karena memiliki nilai LC50 <1000 ppm dan pada kombinasi ekstrak kasar tongkol jagung (Zea mays L.) dan ekstrak kasar daun kelor (Molinga oleifera) (perbandingan 1:1) dapat dikategorikan tidak toksik karena memiliki nilai LC50 >1000 ppm.
POTENSI AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL BUNGA ASOKA (Ixora coccinea L.) Ramadhan, Aulia; Saleh, Chairul; Hairani, Rita; Ruga, Ritbey
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1273

Abstract

Extraction of asoka (Ixora coccinea L.) flowers, phytochemical screening, and antioxidant activity of methanol extract of asoka flowers have been conducted. This study aimed to determine the content of secondary metabolites in the methanol extract of asoka flowers and its antioxidant activity using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The phytochemical screening test revealed that the methanol extract of asoka flowers contained secondary metabolites such as flavonoids, alkaloids, triterpenoids and saponins. With 1 mg/mL, the methanol extract exhibited potential as an antioxidant with an inhibition percentage of 88.10% while vitamin C as a standard used in this study at 1 mg/mL showed an antioxidant activity of 99.23%.
ELEKTRODELOKALISASI ZAT WARNA LIMBAH CAIR SARUNG TENUN SAMARINDA MENGGUNAKAN ELEKTRODA PbO2/Cu Menono, Fera Friskaneke; Wirawan, Teguh; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1361

Abstract

Electrodecolorization of Sarung Tenun Samarinda liquid waste dyestuff using PbO2/Cu electrode has been conducted. This study aims to reduce the level of dyes in Sarung Tenun Samarinda liquid waste samples by electrodecolorization method using lead dioxide (PbO2) electrode as anode and Copper (Cu) as cathode. Electrodecolorization was carried out by varying the working potential, Na2SO4 electrolyte concentration, time, and dye concentration in order to obtain optimum conditions for dye decolorization by electrolysis process. The concentration of the dye was determined by calculating the absorbance data obtained from measurements using a UV-Vis spectrophotometer. The results showed that the optimum conditions of electrodecolorization on orange dyes using PbO2/Cu electrodes were a working potential of 10.5 volts, 0.2 M Na2SO4 electrolyte concentration and a time of 20 minutes. In green dyes, the optimum conditions are working potential of 10.5 volts, electrolyte concentration of Na2SO4 0.1 M and time for 15 minutes. The percentage of decolorization of the orange Sarung Tenun Samarinda liquid waste sample using the PbO2/Cu electrode was 100% and in the green Sarung Tenun Samarinda liquid waste sample was 100%.
SINTESIS NANOPARTIKEL PERAK TERMODIFIKASI L-CYSTEINE SEBAGAI METODE ANALISIS: REVIEW JURNAL Nisa, Hairin; Arif, Moh. Syaiful; Yusuf, Bohari
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1275

Abstract

Silver nanoparticles with a size of 1 to 100 nm with unique properties have many advantages that they are widely applied in the medical and industrial fields. Various methods can be carried out in synthesizing silver nanoparticles both physically, chemically and biologically. In the chemical method, it is done by reducing Ag+ ions into silver nanoparticles so that this method depends on reducing agents and stabilizers used. The use of different reducing agents greatly affects the size of the nanoparticles produced. Based on the literature review, sodium borohydride (NaBH4) has a strong ability to reduce Ag+ ions into silver nanoparticles become a small size. In addition, referring to previous studies if modified with L-cysteine, the silver nanoparticles formed can be stable for more than 2 months at room temperature storage. L-cysteine-modified silver nanoparticles from previous studies were used for colorimetric analysis of vitamin B1 detection in food and water samples, where the color change in silver nanoparticles from yellow to colorless showed remarkable chemical sensor selectivity for detecting target analytes.
Potensi Aktivitas Antioksidan Ekstrak Metanol Daun Sunglai (Peronema canescens Jack.) Nisa, Nahdia Khairun; Marliana, Eva; Erwin, Erwin
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1277

Abstract

Sungkai (Peronema canescens Jack.) is a plant that has the potential as an antioxidant. This research was conducted to determine the antioxidant activity of sungkai leaves. The method use is DPPH damping with vitamin C as a positive control. Methanol extract of sungkai left contains alkaloids, flavonoids, saponins, phenolics and tannins. The antioxidant activity (IC50) was 81,91 mg/L. Methanol extract of sungkai leaf has the potential to have antioxidant activity.
EXPERIMENTAL CHARACTERIZATION TECHNIQUES FOR TRANSITION METAL COMPLEX ANALYSIS Syaima, Husna
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1368

Abstract

Due to their diverse properties and functionalities, metal complexes are central to various applications spanning chemistry, materials science, and beyond. The elucidation of metal complexes through rigorous analysis is paramount for understanding their structure, properties, and potential applications. This review article provides an overview of the techniques employed for analyzing metal complexes and highlights the importance of instrumental techniques utilized. Techniques such as X-ray crystallography, thermogravimetric analysis (TGA) and differential thermal analysis (DTA), Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-Vis), and X-ray diffraction (XRD) are discussed in detail, showcasing their roles in probing different aspects of metal complex chemistry. By employing these analytical techniques, researchers can gain valuable insights into metal complexes' composition, structure, thermal stability, and electronic properties, driving innovation and progress in various scientific and technological fields. Continuous advancements in analytical techniques further enhance capabilities in metal complex analysis, paving the way for ground-breaking discoveries and transformative advancements in chemistry and related disciplines.
PENGHAMBATAN AKTIVITAS α-GLUKOSIDASE DARI EKSTRAK METANOL BUNGA BUGENVIL (Bougainvillea glabra Choisy) Puspitasari, Intan Dessy; Saleh, Chairul; Hairani, Rita; Ruga, Ritbey
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1276

Abstract

The test of Phytochemical screening and antidiabetic activity of methanol extract of bugenvil (Bougainvillea glabra Choisy) flower against α-glucosidase inhibition have been conducted. This study aims to determine the content of secondary metabolite compounds and the effectiveness of the methanol extract of bugenvil flower against α-glucosidase activity. Phytochemical test showed that the methanol extract contained secondary metabolite compounds namely alkaloids, flavonoids, steroids, phenolics and saponins. By 50 µg/mL, the methanol extract of bugenvil flower can inhibit α-glucosidase activity with a percent inhibition value of 79.42% while acarbose as a positive control in this study exhibited antidiabetic activity against α-glucosidase of 99.30% at a concentration of 0.00006 µg/mL.
Adsorption Of Dye From Household Industrial Wastewater Of Samarinda Seberang Weaving Gloves Using Adsorbent From Activated Charcoal Lai Fruit Powder (Durio Kutejensis (Hassk.) Becc.) Sari, Riska Alif Kartika; Wirawan, Teguh; Sitorus, Saibun
JURNAL ATOMIK Vol 9 No 1 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i1.1271

Abstract

Textile dyes include compounds that are difficult to decompose naturally. In the waters is a serious environmental problem because it can have a negative impact. This study aims to utilize lai fruit peel which is used as activated charcoal as an adsorbent to adsorb purple dyes in woven sarong waste water. The first stage of making activated charcoal is through carbonation in a furnace at 500oC for 30 minutes. Activation was carried out chemically by immersing it in 2 M H2SO4 solution for 24 hours. FTIR characterization of the resulting activated carbon was carried out to determine its functional groups and SEM characterization to determine its morphology. The results of FTIR characterization of activated carbon from lai fruit peel powder have functional groups -CO- and –OH, while SEM characterization of activated carbon from lai fruit peel powder is in the form of fibers with open pore surfaces that are spread on the surface and cavity walls of the activated charcoal of lai fruit peel powder. The adsorption process was carried out using the bath method and the concentration of the purple dye was determined using a UV-Vis spectrophotometer. The results showed that the adsorption of purple dye by activated charcoal was optimal at contact time of 1 minute and at pH 8. Adsorption of purple dye followed by the Freundlich adsorption pattern and had a maximum chemical adsorption capacity of 55.209 mg/g.

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