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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 194 Documents
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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.
STUDI BIOAKUMULASI ION LOGAM Pb DALAM RAMBUT DAN DARAH OPERATOR STASIUN PENGISIAN BAHAN BAKAR UMUM, JALAN SENTOSA, SAMARINDA Sukma Wiratama; Saibun Sitorus; Rudi Kartika
JURNAL ATOMIK Vol 3 No 1 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

A study about Bioaccumulation of Pb Metal Ion in Hair and Blood of Operator of General Fuel Filling Station, Sentosa Road Samarinda has been conducted. The aim of the study is to determine the accumulation of Pb metal ions levels and the association between the hours of work of gas station operator assumed to be positively correlated and the levels of Pb metal ions in hair as well as in blood. Hair and blood were homogenized and analyzed by Atomic Adsorption Spectrophotometer (AAS). The results displayed that the lowest and highest level of Pb metal ions contained in hair was 0.03 μg/g and 0.07 μg/g, respectively. The highest number found in blood was similar to the level contained in hair, that is 0.07 μg/mL. However, the lowest level was marginally lower with a number 0.01 μg/mL. The coefficient correlation (r) obtained were 0.822 and 0.859 for hair and blood, respectively. These numbers indicate there was a strong positive relationship between working hours of gas station operator and levels of Pb metal ion in hair and blood. This inference was also supported by the results of t test, that is, 0.564. Furthermore,% determinants analysis was also undertaken which result in 82.2% and 85.9% for hair and blood, respectively to strengthen the test result that working hours of gas station operator in Sentosa Road Samarinda was positively associated with Pb metal ion levels in hair and in blood.
PEMBUATAN ETANOL DARI KULIT PISANG MAHULI (Musa paradisiaca. var sapientum) Suaibatul Aslamiah; Bohari Yusuf; Rudi Kartika
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Pembuatan etanol dari kulit pisang mahuli (Musa paradisiaca. var sapientum) telah dilakukan. Metode yang digunakan dalam penelitian ini adalah hidrolisis enzimatis yaitu mengubah pati menjadi glukosa dengan bantuan enzim α-amilase dan gluko-amilase, kemudian dilanjutkan dengan penambahan nutrisi urea serta proses fermentasi alkohol dan destilasi. Hasil fermentasi kemudian dianalisa menggunakan Kromatografi Gas. Konsentrasi etanol yang optimum didapatkan pada fermentasi hari keempat sebesar 6,212% dengan konsentrasi urea optimum yaitu 0,5%.
KARAKTERISTIK CAMPURAN BATUBARA DAN VARIASI ARANG SERBUK GERGAJI DENGAN PENAMBAHAN ARANG TEMPURUNG KELAPA DALAM PEMBUATAN BRIKET Siti Hosniah; Saibun Sitorus; Alimuddin -
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Penelitian ini bertujuan untuk mempelajari sifat-sifat briket dari campuran antara batubara dengan arang kayu Ulin, Bangkirai dan tempurung kelapa, yaitu dalam rangka mencari sumber energi alternatif. Pembuatan briket melalui tahapan pengarangan, penghalusan arang, pengayakan 60 mesh, pencampuran dengan perekat, pencetakan, pengeringan dengan oven (60°C, ±24 jam) dan pengujian. Perlakuan dalam penelitian ini yaitu variasi komposisi campuran antara batubara dengan arang kayu Ulin, kayu Bangkirai dan tempurung kelapa sebanyak 21 perlakuan.Hasil penelitian menunjukkan, briket dengan komposisi batubara sebanyak 25% dan arang tempurung kelapa sebanyak 75%, serta komposisi batubara sebanyak 25% dengan campuran arang tempurung kelapa, kayu Ulin, dan kayu Bangkirai sebanyak 75% memiliki kualitas yang sesuai dengan kualitas briket standar nasional Indonesia (SNI). Briket dengan komposisi batubara sebanyak 25% dan arang tempurung kelapa sebanyak 75% memiliki kualitas sebagai berikut: nilai kalor 6605 kal/g, nilai kadar karbon terikat 78,26%, nilai zat mudah menguap 19,35%, kadar abu 2,40%, nilai keteguhan tekan 28,55 kg/cm2, kerapatan 0,73 gr/cm3, dan kadar air 8,74%. Sedangkan briket dengan komposisi batubara sebanyak 25% dan campuran arang tempurung kelapa, kayu Ulin, kayu Bangkirai sebanyak 75% memiliki kualitas sebagai berikut: nilai kalor 6396 kal/g, nilai kadar karbon terikat 77,47%, nilai zat mudah menguap 19,66%, kadar abu 2,87%, nilai keteguhan tekan 26,41 kg/cm2, kerapatan 0,70 gr/cm3, dan kadar air 7,87%. Kata Kunci : briket, batubara, kayu Ulin, kayu Bangkirai, tempurung kelapa
STUDI DOCKING MOLEKULAR SENYAWA KUERSETIN, KALKON DAN TURUNANNYA SEBAGAI INHIBITOR SEL KANKER PAYUDARA MC-7 (MICHIGAN CANCER FOUNDATION-7) Resy Lelita; Rahmat Gunawan; Winni Astuti
JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Studi Docking Molekular senyawa Kuersetin, Kalkon dan turunannya sebagai inhibitor sel kanker payudara MCF-7 (Michigan Cancer Foundation-7) telah dilakukan . Hasil yang didapatkan bahwa energi docking setelah proses penambatan pada mode 1 dari ke empat senyawa uji yaitu Kuersetin -7.4 Kkal/mol, 2-(3,4- dihidroksifenil)-5,7-dihidroksi-3-metoksi-3,4-dihidro-2H-1-benzopyran-4-on -6.8 Kkal/mol, Kalkon -6.9 Kkal/mol dan 3-(2,4-dihidroksifenil)-1-fenilpropan-1-on -6.6 Kkal/mol. Kuersetin membentuk ikatan hidrogen dengan asam amino Asam Aspartat 61, Arginin 65, Arginin 68, Fenilalanin 71 dan Serin 75. 2-(3,4- dihidroksifenil)-5,7-dihidroksi-3-metoksi-3,4-dihidro-2H-1-benzopyran-4-on membentuk ikatan hidrogen dengan asam amino Alanin 59, Aparagin 102 dan Arginin 105. Kalkon membentuk ikatan hidrogen dengan asam amino Asam Glutamat 94. Dan 3-(2,4-dihidroksifenil)-1-fenilpropan-1-on membentuk ikatan hidrogen dengan asam amino Tirosin 67. Kuersetin dinilai lebih berpotensi sebagai kandidat obat antikanker dibandingkan 2-(3,4- dihidroksifenil)-5,7-dihidroksi-3-metoksi-3,4-dihidro-2H-1-benzopyran-4-on, chalcone and 3-(2,4-dihidroksifenil)-1-fenilpropan-1-on. Kata Kunci : Kanker Payudara, Docking Molekular, Kuersetin, Kalkon, Protein sel kanker payudara Michigan Cancer Foundation -7 (MCF-7).
PEMBUATAN BIOETANOL DARI SINGKONG KARET (Manihot Glaziovii Muell) DENGAN HIDROLISIS ENZIMATIK DAN DIFERMENTASI MENGGUNAKAN Saccharomyces Cerevisiae Arifwan -; Erwin -; Rudi Kartika
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Singkong Karet (Manihot glaziovii Muell) merupakan umbi yang tidak termasuk bahan makanan  karena mengandung  unsur kimia asam sianida (HCN) yang bersifat racun. Kandungan pati dalam ubi mencapai 98,5 %. Penelitian ini bertujuan untuk mengetahui konsentrasi amonium sulfat dan waktu fermentasi terbaik terhadap kadar bioetanol yang dihasilkan. Proses hidrolisisi pati dilakukan secara  enzimatis melalui tahap liquifikasi dan sakarifikasi dengan menggunakan enzim alfa-amilase dan gluko-amilase yang akan mengkonversi pati menjadi glukosa. Glukosa hasil hidrolisis ditambahkan amonium sulfat sebagai sumber nutrisi dengan variasi 0,75 %; 1 % dan 1,25 % (b/v) kemudian difermentasi menggunakan jamur Saccharomyces cereviceaea dengan variasi waktu 120, 144 dan 168 jam menjadi bioetanol. Pemurnian bioetanol dilakukan dengan proses destilasi. Analisa kadar alkohol menggunakan kromatografi gas. Hasil penelitian menunjukkan penambahan nutrisi amonium sulfat yang paling optimum adalah 1 % (b/v) dan waktu fermentasi yang optimum adalah 168 jam dengan kadar etanol sebesar 28,183 %..Kata-kata kunci:  Singkong karet, fermentasi, amonium sulftat, bioetanol
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.
ANALISIS KADAR LOGAM Pb, Mn dan KANDUNGAN PROTEIN PADA DAGING UDANG WINDU (Penaeus sp.) YANG DIAMBIL DIPERAIRAN SUNGAI DONDANG KECAMATAN MUARA JAWA Octavianus, Riyan; Kartika, Rudi; Hindryawati, Noor
JURNAL ATOMIK Vol 3 No 1 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research on metal concentration of Pb, Mn and protein content in windu shrimp’s meat (Penaeus sp.) analysis in Dondang river, Muara Jawa have been done. This research is aimed to determine the concentration of heavy metal Pb, Mn and concentration of protein inside windu shrimp based by size and different sampling location. Concentration of heavy metal Pb, Mn and protein are correlated using Least Square method. Concentration of heavy metal Pb and Mn are analyzed by using AAS (Atomic Absorption Spectrophotometry) and concentration of protein are analyzed by using Kjeldahl method. Result of this research is the concentration heavy metal Pb and Mn in sampling point 1 in average concentration are 0.556 mg/L and 0.463 mg/L, sampling point 2 are 0.790 mg/L and 0.738 mg/L, sampling point 3 are 0.876 mg/L and 0.905 mg/L. Concentration of protein in windu shrimp in sampling point 1 in average are 23.4928%, sampling point 2 are 28.1701% and sampling point 3 are 29.1622%. Correlation of concentration of heavy metal Pb and Mn to the concentration of protein in windu shrimp (penaeus sp.) with R = 0.791; r = 0.948.
UJI FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN EKSTRAK DAUN RAMBUTAN (Nephelium lappaceum)DENGAN METODE DPPH (1,1-diphenyl-2-picryhidrazyl) Pangaribuan, Fransiscus X. Rico; Sitorus, Saibun; Saleh, Chairul
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research about antioxidant test of rambutan leaves extract (Nephelium lappeceum) by using radical compound DPPH (1,1-diphenyl-2-picrylhidrazil) has been carried out. This research aims to determine antioxidant activity level of rambutan leaves extract and to detrermine kind of secondary metabolites in it. Concetration taht used in rambutan leaves extract are 5 ppm, 10 ppm, 25 ppm, 50 ppm dan 100 ppm. Result of fitochemical shows that secondary metabolites in n-hexane extract were alkaloid and flavonoid, secondary metabolites in ethyl acetat extract were alkaloid, flavonoid and phenolic, secondary metabolites in ethanol extract were alkaloid and phenolic where as secondary metabolites in ethanol-water extract weas phenolic. IC50 value in each extract of n-hexane, ethyl acetat, ethanol and ethaol-water in a row were 56,48 ppm; 16,82 ppm; 25,47 ppm and 8,59 ppm. The highest antioxidant activity level was in ethanol-water.
PEMANFAATAN RESIN Ca-ALGINAT TERMODIFIKASI DENGAN ETILENA DIAMINENA TETRAASETAT (EDTA) DALAM TAHAPAN PRAKONSENTRASI ION Mn(II) BERBASIS METODE KOLOM Sari, Rahma Juwita; Panggabean, Aman Sentosa; -, Erwin
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research on modification of Ca-Alginate microcapsules with Ethylene Diamin Tetra Acetate (EDTA) and Utilization in stages pre concentration column Ion Pb based method has been done. Pre concentration method Pb metal ions is done by using the column or Off-Line method, the water sample is inserted into the column, in the elution using 1.5 M HCl, then eluat were collected and measured using Atomic Absorption Spectrophotometer. The optimum conditions in resin manufacture Ca-Alginate-EDTA is on the composition of CaCl2 1 M Na-alginate 1%, and 0.75% EDTA. The optimum conditions analytical performance of this resin microcapsules with the absorption of Pb most best at pH 8, retention capacity of 0.6546 mg / g resin, 1.5 M HCl eluent The concentration by volume Pb is 8 mL and 3 mL HCl eluen volume, analytical performance of this method good enough for Pb ion analysis is shown of the measurement value detection limit of 0.0469 mg / L level to able replicates expressed as a percentage coefficient of variance for 1:20%. this method can be applied to the analysis of metal ions Fe in water samples from the environment to the value of recoveries of> 95%, using techniques spike indicates that the sample matrix derived from Karang Mumus River and Well Water does not affect the measurement results and can be used by analysis of Pb in the sample water at trace levels. Keywords: Preconcentration, Resin Ca-Alginate-EDTA, Pb, Spectrophotometer

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