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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.
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Articles 10 Documents
 1 
Search results for , issue "Vol 2 No 1 (2017)" : 10 Documents clear
Pembuatan dan Karakterisasi Membran Selektif Ion Timbal (II) dengan Menggunakan Etilen Diamin Tetra Asetat (EDTA) sebagai Ionofor Waqifah, Ummul; Panggabean, Aman S.; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

A research about preparation and characterization of Plumbum (II) ion selective membrane using a PVC based on ethylene diamine tetraacetate as ionophores have been done. Ethylene diamine tetra acetate (EDTA) was able to coordinate with Pb2+ and increase the conductivity of the membrane. Ethylene diamine tetra acetate (EDTA) as the main ingredient mixed with polyvinylchloride (PVC) as a matrix whose first dissolved using tetrahydrofuran (THF), added dioctyl phat alate (DOP) as a plasticizer. The membrane was soaked with Pb2+ for 2 days and membrane absorption ability of EDTA to the metal dopant Pb2+, and measured using atomic absorption spectrophotometer (AAS). Membrane absorption ability of the dopant metal Pb2+ retrieved the percent absorption was 76.01 % at the optimum composition of the membrane with a ratio of EDTA: PVC: DOP is 60: 30: 10. EDTA membrane characterization results with Fourier transform infrared spectroscopy (FT-IR) showed specific functional groups on the membrane EDTA.
PENGEMBANGAN METODE RAPID TEST DALAM PENENTUAN ASH CONTENT DAN CALORIFIC VALUE BATUBARA DI LABORATORIUM PT JASA MUTU MINERAL INDONESIA Kumalasari, Anisa; Panggabean, Aman Sentosa; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

A research on development of rapid test methods for two parameters, calorific value and ash content, based on the needs of minimum time analysis has been conducted. This study aims to determine whether the analytical performance of rapid test methods is comparable with the standard methods. The results showed that the standard and the rapid test method have good analytical performance. Accuracy results which is expressed as recovery percentage show that the calorific values of both methods were in the range of 99.75 % - 100.40 % and the ash content values ​​with both methods were in the range of 93.33 % - 103.70 %. Precision results by CV percentage showed that the calorific value were 0.21 % and 0.23 %, and the value of ash content were 4.03% and 4.28%. For the ruggedness parameter test, the success rate was almost for the entire parameter, excepts for precision test where the ash content value obtained has CV percentage ≥ 5 %. Nevertheless, the overall parameters of the test and the analytical performance analysis are extremely good and acceptable according to the references and a rapid test method can be used as an alternative method.
Penentuan Derajat Esterifikasi Dengan Metode Base Line Pada Sintesis Aldimin Kitosan Asetat Melalui Reaksi Esterifikasi Dari Aldimin Kitosan Dengan Asetat Anhidrida Churohma, Mifta; Tarigan, Daniel; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Determination degree of esterification with the baseline on the synthesis method aldimine chitosan acetate by esterification of aldimine chitosan with acetic anhydride has done. In this research, chitosan modified by chemical being aldimine chitosan acetate. Synthesis aldimine chitosan acetate produced by the esterification reaction between aldimine chitosan with acetic anhydride. The result of FT-IR analysis of aldimine chitosan acetate showed in wavenumbers 3448.72 cm-1, which indicated stretching vibration hydroxyl group -OH. Vibration absorption wave numbers 1735.93 cm-1 indicated carbonyl group C = O, ester and backed group C-O-C with wavenumbers 1033.85 cm-1. vibration absorption in wavenumbers 1651.07 cm-1 indicated the presence of C = N. Degree of esterification or degree of acetylation (DA) in aldimine chitosan acetate assign value 82.85%.
SINTESIS RESIN PENGKHELAT POLYSTYRENE DIVINYLBENZENE-DIMETILGLIOKSIMA DAN KEMAMPUAN ADSORPSI TERHADAP ION LOGAM Ni(II) Darwin, Chepy; Panggabean, Aman Sentosa; Alimuddin, Alimuddin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Penelitian tentang sintesis resin pengkhelat Polistiren divinilbenzena-dimetilglioksima dan kemampuan adsorpsi terhadap ion logam Ni(II) telah dilakukan. Penelitian ini bertujuan mensintesis resin PSDVB-dimetilglioksima. Sintesis resin pengkhelat Polistirene divinilbenzena-dimetilglioksima dilakukan melalui tiga tahap yaitu nitrasi, reduksi dan diazotasi. Pada tahap diazotasi terjadi reaksi kopling antara kation diazonium dengan nukleofil dari dimetilgliokisma yang dilakukan pada suhu 0-3ºC. Karakteristik dilakukan dengan menggunakan metode batch yaitu metode perendaman resin dalam larutan standar Ni(II) dalam waktu 24 jam. Hasil penelitian menunjukkan rendemen dari setiap tahapan sintesis adalah 60,7289%, 95,8940% dan 74,2254%. Resin pengkhelat hasil sintesis dikarakterisasi dengan spektrofotometer FT-IR yang menunjukkan perubahan bilangan gelombang 1350.17 cm-1 dan 1527.62 cm-1 yang merupakan pita serapan dari gugus N-O, bilangan gelombang 3448.72 cm-1 yang merupakan pita serapan dari gugus N-H dan bilangan gelombang 1627.92 cm-1 yang merupakan pita serapan dari gugus azo N=N. Karakteristik adsorpsi resin pengkhelat hasil sintesis terhadap ion logam Ni(II) menunjukkan persentase perolehan kembali mencapai 97,275%.
Pengembangan Metode Rapid Test Preparation Dalam Penentuan Kadar Inherent Moisture dan Total Sulfur Dengan Menggunakan Metode yang Dipergunakan oleh ISO (International Organization for Standardization)) Lumban Gaol Veronica Destiana; Aman Sentosa Panggabean; Rudi Kartika
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The research about the development of rapid test method in determination of inherent moisture concentration and total sulfur which used by the ISO (International Organization for Standardization) has been diving. This research aims to determine is the rapid test method could be used to analyze inherent moisture and total sulfur to determine the analytical performance of the rapid test. Parameters of the validation used in this research are accuracy which described in percent of recovery as the percent of the recovery of inherent moisture are 99,98 % and total sulfur value are 98,57 %, precision described in coefficient of the variant which gained in inherent moisture are 0,49% and total sulfur value is 4,1%. Robustness of method is described in the variation of drying time, which accuracy and precision do not affect by time variation in preparation. The results show that rapid test method can be used for an alternative method which used by the ISO.
PENURUNAN BOD dan TSS PADA LIMBAH INDUSTRI SAUS SECARA ELEKTROKOAGULASI MENGGUNAKAN ELEKTRODA Fe, Cu dan STAINLESS Yuliani, Ika; alimuddin, Alimuddin; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research about decreasing of BOD and TSS from waste in ketchup industry with Electrocoagulation method using Fe, Cu and Stainless electrode for decreasing BOD and TSS have been done. Time optimization based by color transformation from Electrocoagulation process have been done. The result of this research from the effect of time contact on Electrocoagulation process are showed the optimized time are 120 minutes whereas the transformation color into transparent color in 12 Volt using Fe-Cu electrode to the decreasing of BOD and TSS are 1800,6 mg/L ; 190 mg/L with the result of percent of elimination are 38,45% ; 68,85% whereas the value of starter of BOD and TSS are 2925,4 mg/L ; 190 mg/L.
Penetapan kadar vitamin C dalam sirup buah naga merah (hylocereus polhyrizus) dengan variasi waktu penyimpanan Laili, Miftachul; Alimuddin, Alimuddin; Erwin, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

A research on the determination of a level of vitamin C in Red Dragon fruit syrup by conducting storage time variety have been done in normal condition so that it can be consumed. Analysis process has been conducted by Iodimetry titration method through the step of dragon fruit syrup made by the variety of storage time 0 until 20 days. The result showed that high level of vitamin C was 0.03136 % on the beginning day, and the low level was 0.00141 % on the 20th, therefore can be summaries that vitamin C on dragon fruit syrup product can last while 20 days only in the normal condition. Furthermore, for an organoleptic test of the dragon fruit syrup product can last on the beginning day until the day of 15th and on the day of 16th or more that respondents declare of dragon fruit syrup, product was not feasible to consumed.
ISOLASI AMILASE DARI KECAMBAH BIJI NANGKA (Artocarpus heterophyllus Lam) Fahmi, Ismi; Astuti, Winni; Sitorus, Saibun
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

This research aims to isolate the crude extract amylase of sprouted seeds jackfruit (Artocarpus heterophyllus Lam) and determine the specific activity. Determination of total protein concentration and amylase activity of enzyme crude extract on seed germination jackfruit (Artocarpus heterophyllus Lam). Determination of total protein concentration using the method of Bradford, whereas the determination of amylase activity was performed using dinitrosalisilat acid method (DNS). The results showed a total protein concentration of the enzyme crude extract of sprout seeds jackfruit (Artocarpus heterophyllus Lam) is 319,47 ug / mL, amylase activity of 13,96 U / mL and specific activity is 1748,05 U / mg. 
Uji Aktivitas Antihiperurisemia Dari Daun Hijau Tanaman Pucuk Merah (Syzygium myrtifolium Walp.) Terhadap Mencit Jantan (Mus musculus) Juwita, Retno; Saleh, Chairul; Sitorus, Saibun
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Antihyperuricemia activity tests were conducted on an ethanol extract of green leaf plant red bud (Syzygium myrtifolium Walp.). Hyperuricemia is a condition in which uric acid levels in the blood increases due to the consumption of high purine is converted into uric acid. Antihyperuricemia activity test ethanol extract of green leaf plant red bud (Syzygium myrtifolium Walp.) Conducted on male white mice with a variety of doses of 1.85, 3.7 and 7.4 mg/kg. Extract dose of 7.4 mg/kg dose is the closest percentage drop on allopurinol which lowers blood uric acid levels at 55.04 %. Phytochemical screening showed that the green leaf plant red bud contains alkaloids, triterpenoids, steroids, phenolics, flavonoids and saponins. These results indicate that the ethanol extract of green leaf plant red bud has antihyperuricemia activity.
Optimasi Kinerja Analitik Terhadap Penentuan Kadar Fluorin Pada Batubara Dengan Metode Spektrofotometer Visible Adha, Laila Sufina; Panggabean, Aman Sentosa; Kartika, Rudi
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The research about analytical performance optimization to the determination of fluorine’s concentration inside coal using visible spectrophotometry method has been done. The optimum result of the obtain for measurement, some parameters of measurements were validated. Parameters of validation used in this research are accuracy, precision, linearity, LOD, LOQ and robustness of the method. The results of research obtained, the accuracy was 99,34% described in percent of the recovery, obtained precision are 0,4309% described in percent of RSD with linearity equation was y = 10,79x + 16,77. The result of measurement is very good which described by the value of LOD 0,0638 ppm and LOQ 0,2127 ppm. The conclusion of results are the determination of fluorine's concentration inside coal using visible spectrophotometry method have good precision and accuracy which can be accounted.

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