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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 11 Documents
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Search results for , issue "Vol 1 No 2 (2016)" : 11 Documents clear
VALIDASI METODE RAPID TEST DALAM PENENTUAN TOTAL MOISTURE, ASH CONTENT, CALORIFIC VALUE (AR) PADA BATUBARA TERHADAP STANDAR ISO UKURAN 3 MM PT. KALTIM PRIMA COAL Sari, Ermalia Lintang; Panggabean, Aman Sentosa; Hindryawati, Noor
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Penelitian validasi metode rapid test dalam penentuan total moisture, ash content, calorific value (as received) pada batubara terhadap standar ISO (International Organization for Standardizations) dengan ukuran 3 mm (studi kasus di PT. Kaltim Prima Coal) telah dilakukan. Tujuan penelitian ini adalah mengetahui perbedaan pada total moisture, ash content, calorific value jika dilakukan dalam basis (ar) dan mengetahui hasil jika batubara yang digunakan dalam operasional berukuran 3 mm. Berdasarkan penelitian yang telah dilakukan dengan menggunakan batubara ukuran 3 mm diperoleh hasil pada total moisture dan ash content untuk batubara ini tidak terdapat perbedaan dan dapat digunakan dalam operasional laboratorium, sedangkan pada calorific value terdapat perbedaan pada batubara ini. Dalam penentuan ini harus tetap memperhatikan range varian dari nilai reproducibility pada setiap parameter batubara.
PEMANFAATAN BONGGOL PISANG KEPOK (Musa paradisiaca. L) SEBAGAI BAHAN PEMBUATAN PLASTIK YANG MUDAH TERDEGRADASI DENGAN PENAMBAHAN PLASTICIZER GLISEROL. Pratiwi, Ricka Indria; Saleh, Chairul; -, Daniel
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Telah dilakukan penelitian pembuatan plastik yang mudah terdegradasi menggunakan pati dari bonggol pisang kepok (Musa paradisiaca. L) dengan penambahan plasticizer gliserol. Metode yang digunakan adalah proses blending secara fisika. Hasil menunjukkan bahwa konsentrasi gliserol untuk menghasilkan plastik yang mudah terdegradasi paling baik adalah pada variasi volume gliserol 4 mL dengan nilai ketahanan air sebesar 62,23 % dan nilai degradabilitas sebesar 93,45 %.
UJI AKTIVITAS ANTIHIPERGLIKEMIK EKSTRAK ETANOL DAUN TEMBELEKAN (Lantana camara L.) TERHADAP MENCIT PUTIH JANTAN TERINDUKSI ALOKSAN Eka Setia Rini; Rudi Kartika; Rahmat Gunawan
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Phytochemical screening has been conducted on the ethanol extract of tembelekan leaves (Lantana camara Linn) which showed the presence of alkaloids, flavanoids, steroids, triterpenoids and phenolic. Testing antihyperglicemic activity of ethanol extract tembelekan leaves conducted experiments in the laboratory with each dose 14 mg/kg BW, 28 mg/kg BW and 56 mg/kg BW given orally in male mice induced by alloxan. Measurement of blood glucose levels done on day 0, 4, 8, 14 and 18 by using glucometer and glucose test strips. The decrease in blood glucose levels is 56,89 % with ethanol extract tembelekan leaves dose 56 mg/kg BW. The results showed that there is decrease in blood glucose because given ethanol extract tembelekan leaves.
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%.
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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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.
ANALISIS KADAR ION TIMBAL (Pb) DAN ION KROMIUM (Cr) PADA RAMBUT PEKERJA PERBENGKELAN DI KOTA SAMARINDA -, Sugiarti; Gunawan, Rahmat; -, Alimuddin
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Telah dilakukan penelitian ini yang bertujuan untuk mengetahui kadar ion timbal dan ion kromium pada rambut pekerja perbengkelan dengan variasi umur dan lama bekerja dengan kadar ion timbal dan ion kromium pada rambut pekerja perbengkelan. Rambut yang sudah dikumpulkan dicuci kemudian diabukan dan dihomogenkan kemudian dianalisis dengan Atomic Absorption Spectrophotometer (AAS). Panjang gelombang untuk analisis logam timbal 283,3 nm dan untuk logam kromium 357,9 nm. Hasil menunjukkan analisis kadar ion timbal sampel pada rambut pekerja bengkel terendah 3,892 (mg/kg) yang tertinggi 48,814 (mg/kg) dan untuk kadar ion kromium sampel rambut pada pekerja bengkel terendah 1,578 (mg/kg) yang tertinggi 36,884 (mg/kg). Berdasarkan uji statistik analisis korelasi yang berhubungan positif umur dan lama bekerja dengan kadar ion timbal dan ion kromium pada rambut pekerja perbengkelan. Dengan Koefisien determinan besarnya kadar ion timbal berdasarkan hubungan lama bekerja 98,2 % dan   untuk ion kromium 97,7 %,  dan koefisien determinan berdasarkan hubungan umur dengan kadar ion timbal 78,2 % dan ion kromium 83,2 %.
PEMBUATAN BIODIESEL DARI LEMAK IKAN PATIN(Pangasius sp) DENGAN RADIASI GELOMBANG MIKRO Tanjung, Albayssag Faisal; -, Alimuddin; Yusuf, Bohari
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The research about made biodiesel from fat of patin fish (Pangasius sp) as raw material and known influence time exposure microwave radiation to concentration biodiesel that was produced have been done.Fat of patin fish heated to get oil extract. The oil extract was refluxed with methanol as reactant and H2SO4 as catalyst for 120 minute. Then transesterified with methanol as reactant and NaOH as catalyst with different time that was for 2, 4, 6, 8, and 10 minutes. The high product of biodiesel is 87,2 b/v that was exposured microwave radiation for 8 minutes. To knew kind of methyl ester in biodiesel used GC-MS and the high concentration of methyl ester in biodiesel is methyl oleat with concentration 24,74%.
KARAKTERISASI BIOIDIESEL LEMAK IKAN BAUNG (MYTUS NEMURUS) DENGAN KATALIS CaO DARI CANGKANG TELUR AYAM Pali, Mendriyani; -, Alimuddin; -, Daniel
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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The research abaout the use ash of eggchell as source of base catalyst in application for reaction of transseterification from fish baung fat. Conten of base compound in eggchell ash was analyzed by AAS and acidy alkalimetry. The result of the research showed that calcium concentration as carbonat calcium salt in the as of eggchell was 74,8% (w/w). weight variation on the eggchell as catalyst transeterification process is performed to find the optimum reqaction condition if the biodiesel production. Aqquisition of the highest biodiesel yield at catalyst weight of 2,5 % was 96.7663 %. The composition of fatty acid of fish baung fat from transesterification result it is determinate with FT-IR and GC-MS. GC-MS analysis showed that fatty acids are the dominant constituent in the biodiesel is methyl oleate in the amount of 39,39%.
PEMBUATAN PLASTIK POLIHIDROKSI YANG DAPAT TERDEGRADASI DARI SINGKONG GAJAH (Manihot esculenta) DENGAN PENAMBAHAN GLISEROL SEBAGAI PLASTICIZER Syafriyanti, Yuly; Gunawan, Rahmat; Saleh, Chairul
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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The synthesis of plastic production which can be degreded use manihot esculenta extract already researched. The method of this research using blending according to physics with the addition of glycerol as a plasticizer and FT-IR characterization. The result show that the glycerol concentrate that produce plastics which is easy to degreded well, exist in 45% concentrate whit a value of 25% water resistance and degradability value of 19,7 mg/day. The date of FT-IR give information that there are group alteration or between before and after glycerol increasing in long wave intensity
ANALISIS VARIASI NUTRISI AMMONIUM SULFAT DAN UREA DALAM PEMBUATAN BIOETANOL DARI KULIT PISANG KEPOK (Musa paradisiaca. L) DENGAN HIDROLISIS ENZIMATIK DAN FERMENTASI MENGGUNAKAN Sacchromyces Cerevisiae Sahriani, Andi; Yusuf, Bohari; Kartika, Rudi
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Telah dilakukan penelitian analisis variasi nutrisi ammonium sulfat dan urea dalam pembuatan bioetanol dari kulit pisang kepok (Musa paradisiaca. L) dengan fermentasi menggunakan saccharomyces cerevisiae. Pada  penelitian ini hasil  menunjukkan  konsentrasi  ammonium  sulfat  0,5 %, 1 % dan 1,5 % yang optimum masing-masing konsentrasi menghasilkan kadar etanol yaitu sebesar 7,799 %, 5,195 % dan 3,121 % sedangkan pada konsetrasi urea yang optimum masing-masing konsentrasi menghasilkan kadar etanol yaitu sebesar 21,409 %, 16,809 % dan 22,439 %. Waktu fermentasi optimum pada ammonium sulfat adalah 7 hari sedangkan waktu fermentasi pada urea yang optimum adalah 5 hari. Berdasarkan uji statistik koefisien determinasi R2 dan dilanjutkan dengan koefisien korelasi terdapat hubungan waktu fermentasi dan penambahan nutrisi ammonium sulfat terhadap kadar etanol dan waktu fermentasi dan penambahan nutrisi urea terhadap kadar etanol. Kata Kunci : Bioetanol, Pisang Kepok (Musa paradisiaca. L), Ammonium Sulfat, Urea.

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