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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 12 Documents
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Search results for , issue "Vol 1 No 1 (2016)" : 12 Documents clear
PEMBUATAN BIOETANOL DARI BIJI LAI (Durio kutejensis) Aditya, Roy; -, Alimuddin; Kartika, Rudi
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Durian Lai (Durio kutejensis) merupakan buah lokal Kalimantan. Sejauh ini biji buah lai belum dimanfaatkan hanya dibuang begitu saja sebagai limbah, kandungan karbohidrat yang tinggi mencapai 47,6 %. 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 glukolase yang akan mengkonversi pati menjadi glukosa. Glukosa hasil hidrolisis ditambahkan amonium sulfat sebagai sumber nutrisi dengan variasi 0,1 %; 0,3 % dan 0,5 % (b/v) kemudian difermentasi menggunakan jamur Saccharomyces cereviceaea dengan variasi waktu 4, 5 dan 6 hari. Pemurnian bioetanol dilakukan dengan proses destilasi. Analisa kadar etanol menggunakan kromatografi gas. Hasil penelitian menunjukkan penambahan nutrisi amonium sulfat yang paling optimum adalah 0,3 % (b/v) dan waktu fermentasi yang optimum adalah 6 hari dengan kadar etanol sebesar 9,403 %. Kata Kunci : Biji lai (Durio kutejensis), ammonium sulfat, fermentasi, bioetanol
PENGARUH ION PENGGANGGU Pb2+ DAN Fe2+ TERHADAP ELEKTRODEPOSISI LOGAM KADMIUM (Cd) DALAM SAMPEL AIR Miu, Agustinus; -, Alimuddin; Yusuf, Bohari
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The research was performed about interferes between of ion Pb2+ and Fe2+ on electrodeposition of ion Cadmium (Cd) in the water sample with electrode Al-Al. Electrolysis on solution 3CdSO4. 8H2O with three parameters, like time variation of electrolysis, influence variation of concentration Pb2+ ions and  influence of mix variation concentration of ions Pb2+ and Fe2+. The results showed that the longer electrolysis, more metal deposition on the electrode. Based on observation, variation the number level of metals Cadmium (Cd) that deposition on the electrode was up 83.62 % on 120 minutes. The variations of addition of ion Pb2+ (2, 4, 6, 8 and 10 mg/L) obtained percent decrease in the level of disruption to in a solution of ion Cadmium (Cd) with average 21.53 % with every addition concentration of disruptor ion Pb2+ give influence 0.21 %. The variations of the addition disruptor ion Pb2+ and Fe2+ (2, 4, 6, 8 and 10 mg/L) obtained percent decrease of disruption in solution of ion Cadmium (Cd) with result 18.46 %, with each addition of ion Pb2+ and Fe2+ obtained 0.96 %. This showed that the addition of the ion disruptor on proccess electrodeposition  given influence on Cadmium (Cd) electrodeposition itself, but for every addition of concentration given less significant effects. Keywords: Electrodeposition, electrode Al-Al and decrease percentace.
EKSTRAKSI DAN UJI STABILITAS ZAT WARNA DARI KULIT BUAH ALPUKAT (Persea americana Mill) DENGAN METODE SPEKTROSKOPI UV-VIS Fauziah, Nadiya Ayu; Saleh, Chairul; -, Erwin
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The avocado skin fruit (Persea americana Mill) is one of species of Lauraceae family that had many benefits and efficiacy for human. Avocado is a woody plant, the life cycle can reach decades and were known to have potential as pigmen. The purpose of this study is to extract and determine the stability of pigmen from avocado skin fruit (Persea americana Mill) with UV-Vis Specroscopy methode. The extraction was done with soxhlet method using ethanol. The result of soxhlet was 142,13 gr avocado skin fruit dried powder was gained 88,85 gr ethanol extract. The ethanol extract of avocado skin dried powder was concentrated using rotary avoporator was gained 47,93 gr. The result phytochemical study, shown that ethanol coarse contained of Tannin compound, flavonoids and antosianin. The study stability of pigmen from avocado skin fruit (Persea americana Mill) extract was done to temperature effect were 40oC, 50oC, 60oC, 70oC and 80oC, pH effect were 3, 4, 5 and 6 and long storage effect were 1, 2, 3, 4 and 5 days at wave length 200-400 nm. The observational data were analyzed by ANOVA followed by Duncan test..Keywords: Persea americana Mill, Phytochemical , Stability of Pigmen
UJI ANTIHYPERGLIKEMIK EKSTRAK ETANOL AKAR TEMBELEKAN (Lantana camara L.) TERHADAP KADAR GLUKOSA DARAH MENCIT JANTAN (Mus musculus) Sulistiani, Oktaviana Dewi; Kartika, Rudi; Sitorus, Saibun
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Phytochemical screening from extract ethanol of tembelekan root has been carried out, its showed the presence of alkaloids, phenol, sapponin and flavonoids. Antihyperglikemik test from ethanol extract of tembelekan root had been done through experiment in laboratory, each doses 13,95, 27,90 and 55,80 mg/Kg BW was given orally at male mice to know the effect of antihyperglikemik toward the decrease of glukosa level in male mice's blood. The measurement at glucose level inside male mice's blood was done on 0th, 8th and 18th day by using glucometer and glucotest strip devices. giving the variation of doses etanol extract of tembelekan root, its showed at doses 55,80 mg/Kg BW could decrease the glucose level until 61,57%. From this research showed the result of  decrease of glucose level because the effect from ethanol extract of tembelekan root that distributed inside the blood.  Keywords : Tembelekan root, antihyperglikemic, blood glucose, mice, alloxan
POTENSI TUMBUHAN CIPLUKAN (Physalis angulata Linn.) SEBAGAI ANTIOKSIDAN ALAMI Nuranda, Apri; Saleh, Chairul; Yusuf, Bohari
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Potential of Ciplukan plant as natural antioxidants, the aim of this research is to determine the antioxidant potential of Ciplukan plant. First step is to know the active compound of the plant. Alkaloid and saponin are present at ciplukan leaves, stem and fruit, meanwhile steroid is present at leaves and stem. Moreover, flavonoid and triterpenoid is only present at stem and fruit, respectively. Phytochemical test are employed to dermine the active compound in the leaves, stem and fruit of ciplukan. Brine shimp lethality test are conducted to determine toxicity of the extract.The LC50 from the leaves extract is 962.054 ppm, stem extract is 753.558 ppm and at the fruit is 1.004,73 ppm. Antioxidant activity measurement conducted by reacting the sample with 1,1-difenil-2-pikrilhidrazil radical and measures the absorbance at wavelength 517 nm. Vitamin C is use as positive control. The inhibition concentration 50 vitamin C is 34.91 ppm. Meanwhile, the Inhibition concentration 50 of the leaves extract is 60.34 ppm, the stem extract is 56.36 ppm and the fruit extract is 63.46 ppm. These result indicated that Ciplukan plant is potensial as antioxidant source.Keywords: leaves, stems, fruit ciplukan (Physalis angulata.L), antioxidants,, DPPH and BSLT.
OPTIMASI KINERJA ANALITIK PADA PENENTUAN SURFAKTAN ANIONIK DALAM SAMPEL AIR ALAM MENGGUNAKAN METODE MBAS (Methyl Blue Active Subtance) Rani Novia Ulya; Bohari Yusuf; Aman Sentosa Panggabean
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

 Penelitian tentang optimasi kinerja analitik pada penentuan surfaktan analitik pada penentuan surfaktan anionik dalam sampel air alam menggunakan metode MBAS (Methyl Blue Active Subtance) telah dilakukan. Penelitian ini bertujuan mengetahui titik optimum dari surfaktan anionik dengan menggunakan metode MBAS yang telah dioptimasi kinerja analitiknya. Dilakukan metode optimasi pada pengaruh Cloroform dan pH dimana surfaktan anionik bereaksi dengan warna biru metilen dan diukur dengan spektrofotometer UV-Vis dengan panjang gelombang 637 nm. Diperoleh volume Cloroform yang optimal adalah 10 mL dengan pH optimal adalah pH 4. Lalu dilakukan proses kinerja analitik, metode ini sangat baik untuk menganalisis surfaktan ditunjukkan dari pengukuran nilai batas deteksi sebesar 0,3394 ppm, dengan tingkat kebolehulangan yang diyatakan dengan nilai presentase koefisien variasi sebesar 2,33%. Metode ini dapat diaplikasikan untuk analisis surfaktan pada sampel air dari lingkungan dengan nilai perolehan kembali > 95%, menggunakan teknik spike menunjukkan bahwa matriks sampel yang berasal dari sungai Mahakam tidak mempengaruhi hasil pengukuran. Kata Kunci: Kinerja Analitik, Surfaktan, MBAS
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
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
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
PEMBUATAN SABUN DALAM BENTUK POLIOL DARI MINYAK BIJI KELOR (Moringa oleifera) Sihombing, Eka Putri Jayanthy; Tarigan, Daniel; Sitorus, Saibun
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Polyol compounds obtained by epoxidation dan hydroxylation, the results obtained with the reaction yield of 69.23%. Potassium soap mixture in the form of a polyol obtained by saponification polyol with Potassium Hydroxide with a yield of 70.36%. Polyol and potassium soap in the form of a polyol mixture was analyzed by FT-IR spectrophotometer.Respectively iodine from moringa seed oil and polyol are 107.3769 mg I / gram of oil and 4.6755 mg I / gram of oil. HLB of fatty acid potassium soap of moringa seed oil and potassium soap in the form of a mixture of polyol is determined by titration method and obtained HLB of fatty acid potassium soap of moringa seed oil amounted to 5,2178 while the potassium soap in the form of a polyol mixture of 8,4767. Free alkalinity of soap potassium mixture in the form of a polyol is 0.551%. Based on the stability and strength of the foam test, the concentration of potassium soap mixture in the form polyols having the most excellent foam stability is 1% and which has the best strength is 1%.Keywords: moringa seed oil, epoxidation, polyol, saponification

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