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JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Published by Universitas Sari Mutiara Indonesia
ISSN : ""     EISSN : 26153378     DOI : https://doi.org/10.51544/kimia.v6i1
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Materials Science & Nanotechnology
Focus on results study and literature review in the scope of chemistry education and chemistry sciences in the world. Scope: Chemistry Education Analytical chemistry, including new techniques and instrumentation Biochemistry and medicinal chemistry Inorganic chemistry, including main group, transition metal, and f-block compounds, as well as coordination, organometallic, and solid-state chemistry Materials chemistry of hard and soft matter, from the nanoscale upwards Nuclear chemistry and radioactivity Organic chemistry, including synthesis, characterization, and properties of organic compounds, as well as a study of organic reactions and their mechanisms Physical chemistry and chemical physics Sustainable, green, and environmental chemistry Theoretical and computational chemistry
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 131 Documents
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ANALISIS KADAR BESI (Fe) PADA AIR SUMUR GALI PENDUDUK WILAYAH KOMPLEKS RAHAYU KELURAHAN MABAR HILIR KECAMATAN MEDAN DELI KOTA MEDAN Maniur Arianto Siahaan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 1 (2019): Volume 3 Nomor 1 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Kadar besi adalah metel berwarna putih keperakan liat dan dapat dibentuk . dialam didapat sebagai hematit. Didalam air minum Fe menimbulkan rasa, warna (kuning), pengendapan pada dinding pipa, pertumbuhan bakteri besi, dan kekeruhan. Besi dibutuhkan oleh tubuh dalam pembentuk hemaglobin. Banyaknya Fe dalam tubuh dikendalikan pada fase absorbsi. Tubuh manusia tidak dapat mengexkresikan Fe karenanya mereka yang serinng mendapat transfusi darah, warna kulitnya menjadi hitam karena akumulasi Fe. Sekalipun Fe itu diperlukan oleh tubuh, tetapi dalam dosis besar dapat merusak dinding usus, dan menurunya fungsi paru-paru. Tujuan penelitian ini untuk mengetahui ada tidaknya kadar besi (Fe) pada air sumur gali. Penelitian ini menggunakan metode Spektrofotometer Serapan Atom (SSA). Sampel ini diambil dari penduduk komplek Rahayu Jalan Mangaan IV Lingkungan III Mabar Hilir Medan dan penelitian ini dilakukan di Laboratorium Kesehatan Daerah Provinsi Sumatera Utara. Waktu penelitian ini 14-16 Agustus 2018. Dari hasil penelitian terdapat dengan jumlah hasil , 1,64 mg/L , 5,835 mg/L , 2,98 mg/L, 2,4 mg/L, 3,195 mg/L, Maka dari 5 sampel tidak memenuhi syarat standart kualitas air bersih. Izin Permenkes R.I.No.416/MENKES/PER/IX/1990. Abstract : Iron is a silvery white metel and can be formed. natural is obtained as hematite. In drinking water Fe causes taste, color (yellow), precipitation on the pipe wall, growth of iron bacteria, and turbidity. Iron is needed by the body in forming hemaglobin. The amount of Fe in the body is controlled in the absorption phase. The human body cannot excrete Fe, hence those who often get blood transfusions, their skin color becomes black due to the accumulation of Fe. Even though Fe is needed by the body, but in large doses can damage the intestinal wall, and reduce lung function. The purpose of this study was to determine the presence or absence of iron (Fe) levels in the dug well water of Rahayu. This study uses the atomic absorption spectrophotometer method (AAS). This sample was taken from the residents of the Rahayu Complex Road Mangaan IV Neighborhood III Mabar downstream field and this study was conducted at the Regional Health Laboratory of North Sumatera Province. The time of this study was 14-16 August 2018.. From the research results there were a number of results, 1, 64 mg / L, 5,835 mg / L, 2.98 mg / L, 2.4 mg / L, 3,195 mg / L, So from the 5 samples do not meet the standard requirements for clean water quality. Permit of the Minister of Health R.I.No.416 / MENKES / PER / IX / 1990. Keywords : Fe Content, Dug Well Water, AAS..
PEMANFAATAN LIMBAH KALENG MINUMAN YANG MENGANDUNG ALUMINIUM (Al) MENJADI TAWAS BERNILAI EKONOMIS Erdiana Gultom; Hestina .
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 1 (2019): Volume 3 Nomor 1 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Peningkatan limbah setiap tahunnya sangat berpengaruh pada kelestarian lingkungan hidup. Untuk itu sangat dibutuhkan penanganan yang serius untuk masalah ini. Adapun usaha yang bisa dilakukan adalah dengan memanfaatkan limbah tersebut menjadi material yang bernilai ekonomis. Dalam hal ini dilakukan penelitian pemanfaatan limbah kaleng minuman sebagai bahan baku pembuatan tawas. Dalam penelitian sebelumnya diperoleh kadar aluminium dalam limbah kaleng minuman terdapat mencapai 83,98% Setelah dilakukan penelitian diperoleh bahwa kadar aluminium dalam tawas yang dibuat dari limbah kaleng minuman mengandung 4,57% lebih baik daripada tawas komersial yang hanya 0,37%. Abstract : Increased waste each year is very influential on environmental sustainability. For this reason, serious treatment is needed for this problem. The business that can be done is to utilize the waste into economically valuable material. In this case, a research was carried out on the utilization of beverage cans as raw material for alum production. In previous studies, aluminum content in beverage cans was found to reach 83.98%. After the study, it was found that aluminum content in alums made from beverage cans contained 4.57% better than commercial alums which were only 0.37%. Keywords : Alum, Aluminum, Canned Beverage Waste.
ANALISIS KADAR NATRIUM BENZOAT PADA MANISAN BUAH CHERRY YANG BEREDAR DI PASAR PETISAH Maniur Arianto Siahaan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 2 No 2 (2018): Volume 2 Nomor 2 Tahun 2018
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Buah cherry adalah salah satu buah berbiji, tanaman ini tumbuh subur di iklim sub tropis Pada manisan buah chrery sering ditambahkan sebagai bahan pengawet natrium benzoat, dengan tujuan untuk menghambat pertumbuhan mikroba, jamur dan dapat menjadi bahan pengawet yang disimpan dalam waktu yang relativ lama. Biasanya manisan cherry yang tidak menggunakan bahan hanya dapat bertahan paling lama kurang dari lima hari, lebih dari itu manisan tersebut sudah tidak layak untuk dikonsumsi, sebab akan tercemar mikroba ataupun jamur. Metode yang digunakan pada penelitian ini adalah eksperimen laboratorium uji kualitatif dan kuantitatif. dengan preaksi etanol dan asam sulfat untuk mengetahui ada tidaknya natrium benzoat yang terdapat dalam sampel. Berdasarkan hasil penelitian dari 5 sampel manisan cherry semuanya positip mengandung benzoat dengan kadar benzoat pada manisan buah cherry yang diperjual belikan dipasar petisah Medan. Untuk sampel A : 321,18 mg/kg, sampel B : 315,48 mg/Kg,sampel C : 348,22 mg/Kg,sampel D : 199,23 mg Kg.,sampel E : 88,13 mg/Kg. Dari hasil penelitian ini, semua sampel manisan buah cherry masih dalam ambang yaitu 1gr/Kg hasil ini masih dalam ambang batas ketentuan diperbolehkan. Sesuai peraturan kementerian kesehatan RI No. 722/Menkes/per/IX/1988 tentang penggunaan bahan tambahan makanan natrium benzoat yang ditetapkan Permenkes. Dengan demikian, manisan cherry diperjualbelikan dipasar petisah masih aman untuk dikonsumsi. Abstract : Cherry fruit is a seeded fruit, this plant thrives in sub-tropical climates. Candied fruit cherries are often added as preservatives of sodium benzoate, with the aim of inhibiting the growth of microbes, fungi and can be preservatives stored for relatively long periods of time. Usually cherry sweets that do not use ingredients can only last for less than five days, more than that they are not suitable for consumption, because they will be contaminated by microbes or fungi. The method used in this study is a qualitative and quantitative laboratory test experiment. with ethanol and sulfuric acid reaction to determine the presence or absence of sodium benzoate contained in the sample. Based on the results of the study of 5 candied cherry samples all positive containing benzoate with benzoate levels in candied fruit candies that are sold and traded in Medan Medan market. For sample A: 321.18 mg / kg, sample B: 315.48 mg / Kg, sample C: 348.22 mg / Kg, sample D: 199.23 mg Kg, sample E: 88.13 mg / Kg . From the results of this study, all candied cherry fruit samples were still within the threshold of 1gr / kg this result was still within the allowed threshold. In accordance with the regulation of the Indonesian Ministry of Health No. 722 / Menkes / per / IX / 1988 concerning the use of sodium benzoate food additives set by Permenkes. Thus, candied cherries are traded in the petisah market is still safe for consumption. Keywords : Candied Cherry, Sodium Benzoate, Titrimetry.
EFEKTIVITAS ARANG AKTIF CANGKANG TELUR BEBEK DAN KULIT DURIAN SEBAGAI ADSORBEN UNTUK MENURUNKAN KADAR BILANGAN PEROKSIDA DAN ASAM LEMAK BEBAS PADA MINYAK GORENG BEKAS Barita Aritonang; Salomo Sijabat; Ahmad Hafizullah Ritonga
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 1 (2019): Volume 3 Nomor 1 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Penggunaan minyak goreng bekas secara berulang kali pada suhu tinggi akan menyebabkan kualitas minyak goreng dan nilai gizi makanan yang digoreng menurun sehingga mengakibatkan terbentuknya senyawa aldehida, keton, dan bau tengik, yang berdampak buruk bagi kesehatan tubuh. Untuk memurnikan dan meningkatkan kualitas minyak goreng bekas sehingga dapat digunakan kembali dengan aman dalam mengolah makanan dilakukan melalui proses adsorpsi dengan arang aktif dari cangkang telur bebek dan kulit durian. Proses pembuatan arang aktif dari cangkang telur bebek dan kulit duriantelah berhasil di sintesis melalui proses karbonisasi di dalam furnace pada suhu 600 °C selama 2jam. Penelitian ini bertujuan untuk menurunkan kadar bilangan peroksida dan asam lemak bebas pada minyak goreng bekas sebelum dan sesudah 3,4 dan 5 kali penggorengan dengan dan tanpa pemberian arang aktif dari cangkang telur bebek dan kulit durian. Penentuan kadar bilangan peroksida dilakukan dengan menggunakan metode titrasi iodometri sedangkan penentuan kadar asam lemak bebas dilakukan dengan metode titrasi asidi alkalimetri. Berdasarkan hasil penelitian yang telah dilakukan arang aktif dari cangkang telur bebek dan kulit duriansetelah diaktivasi dengan H3PO4 4N sudah memenuhi persyaratan yang ditetapkan oleh SNI No. 06-3730-1995, diperoleh kadar air 2,5 %, kadar abu 5 %, daya serap iod 746 mg/g, kadarkarbon terikat 86%. Kadar bilangan peroksida pada minyak goreng bekas sebelum dan sesudah 3, 4 dan 5 kali penggorengan dengan pemberian arang aktif sampel A kadarnya 0,0386 meq/kg, sampel B kadarnya 0,0414 meq/kg, sampel C kadarnya 0,0423 meq/kg, sampel D kadarnya 0,0429 meq/kg. Semua sampel masih memenuhi syarat SNI 01-3741-2002 yaitu 10 meq/kg O2. Kadar Asam Lemak Bebas pada minyak goreng bekas sebelum dan sesudah 3, 4 dan 5 kali penggorengan setelah pemberian arang aktif sampel A kadarnya 0,2186%, sampel B kadarnya 0,3571%, sampel C kadarnya 0,4826%, sampel D kadarnya 1,3845%. Semua sampel masih memenuhi syarat SNI 01-3741-2002. Abstract : Increased waste each year is very influential on environmental sustainability. For this reason, serious treatment is needed for this problem. The business that can be done is to utilize the waste into economically valuable material. In this case, a research was carried out on the utilization of beverage cans as raw material for alum production. In previous studies, aluminum content in beverage cans was found to reach 83.98%. After the study, it was found that aluminum content in alums made from beverage cans contained 4.57% better than commercial alums which were only 0.37%. The use of used cooking oil repeatedly at high temperatures will cause the quality of cooking oil and the nutritional value of fried foods to decrease, resulting in the formation of aldehydes, ketones, and rancid odors, which adversely affect the health of the body. To purify and improve the quality of used cooking oil so that it can be safely reused in food processing through an adsorption process with activated charcoal from duck eggshells and durian bark. The process of making activated charcoal from duck eggshells and thorn bark has been successfully synthesized through the carbonization process in the furnace at 600 ° C for 2 hours. This study aims to reduce the levels of peroxide and free fatty acids in used cooking oil before and after 3,4 and 5 frying pans with and without administration of activated charcoal from duck eggshells and durian bark. Determination of the level of peroxide number was carried out using the iodometric titration method while the determination of free fatty acid levels was carried out by the alkalimetry asidi titration method. Based on the results of research that has been carried out active charcoal from duck eggshell and durian bark after activation with H3PO4 4N has met the requirements set by SNI No. 06-3730-1995, obtained a moisture content of 2.5%, ash content of 5%, absorption of iodine 746 mg / g, carbon dioxide bound 86%. Levels of peroxide in used cooking oil before and after 3, 4 and 5 times frying by giving activated charcoal sample A levels are 0.0386 meq / kg, sample B levels are 0.0414 meq / kg, sample C levels are 0.0423 meq / kg , the sample D level was 0.0429 meq / kg. All samples still meet SNI 01-3741-2002 requirements, which are 10 meq / kg O2. Free Fatty Acid levels in used cooking oil before and after 3, 4 and 5 times frying after giving activated charcoal sample A levels are 0.2186%, sample B levels are 0.3571%, sample C levels are 0.4826%, sample D levels are 1 , 3845%. All samples still meet SNI 01-3741-2002 requirements. Keywords : Duck Egg Shells, Durian Bark, Active Charcoal, Free Fatty Acids, Peroxide Numbers.
PEMBUATAN KERTAS DARI LIMBAH KULIT DURIAN DAN AMPAS TEBU DENGAN PERBEDAAN KONSENTRASI NaOH Cut Masyitah Thaib; Erdiana Gultom; Barita Aritonang
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 4 No 1 (2020): Volume 4 Nomor 1 Tahun 2020
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Kertas merupakan salah satu kebutuhan pokok yang sangat penting, hal ini dapat dilihat hampir semua aktivitas sehari-hari membutuhkan banyak kertas, seperti untuk surat kabar, majalah, buku, kemasan, kertas faks, fotokopi dan kertas cetak. Selama ini pembuatan kertas banyak menggunakan selulosa yang berasal dari pohon kayu, untuk mengurangi ketergantungan penggunaan bahan baku kayu, maka diperlukan bahan baku alternatif bagi industri kertas tersebut. Salah satu alternatif bahan baku pengganti kayu untuk industri kertas adalah limbah kulit durian dan ampas tebu. Pembuatan kertas dari limbah kulit durian dan ampas tebu dengan variasi konsentrasi NaOH, dengan tujuan untuk memperoleh bahan baku alternatif pengganti kayu . Kulit durian dan ampas tebu dimasak menggunakan larutan NaOH dengan konsentrasi 2,5; 3,0 dan 3,5% pada suhu 120 0C selama 90 menit, kemudian dilakukan proses pemutihan dengan H2O2 (Hidrogen peroksida). Berdasarkan hasil penelitian diperoleh kadar selulosa kertas dari kombinasi kulit durian dan ampas tebu sebesar 80,12%, pada konsentrasi NaOH 3,5 % dengan waktu pemasakan 90 menit dan suhu pemasakan 120 °C.
PENENTUAN KADAR ALKOHOL PADA TUAK AREN YANG DIPERJUALBELIKAN DI NAGORI DOLOK KECAMATAN SILAU KAHEAN KABUPATEN SIMALUNGUN SUMATERA UTARA Maniur Arianto Siahaan; Erdiana Gultom
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 2 (2019): Volume 3 Nomor 2 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Alcohol is an organic compound that can affect the central nerves and layers of the human body to some extent. Fermented sugar palm is a type of alcoholic beverage that is also made from various types of sugar palm. The purpose of this study was conducted to determine the level of alcohol contained in sugar palm and to determine the type of alcoholic drink from sugar palm. The method used in this study is destrictive using the distillation method. The test results obtained alcoholic sugar from sugar of 4.93-8.47% alcoholic drinks included, both in samples A and B. Sample A contains 1-5% alcohol and Sample B contains 5-20% alcohol. The results obtained from research on the determination of alcohol levels in sugar palm have fulfilled the requirements of Permenkes.
REVIEW : PEMBUATAN NANOKOMPOSIT KARET ALAM / POLIOLEFIN / ORGANOBENTONIT Ahmad Hafizullah Ritonga; Novesar Jamarun
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 2 (2019): Volume 3 Nomor 2 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Nanocomposites can be made by mixing three types of materials, namely natural rubber, polyolefin, and organobentonite. This article review discusses deproteinization of natural rubber using the incubation method, the grafting process of anhydrous maleate on natural rubber, either by reflux technique or by using an internal mixer, modification of natural rubber with thermoplastic materials in the form of polyolefins (such as polyethylene or polystyrene), and bentonite filler which is nanoparticle size and organic material has been modified to form organobentonite. The blending technique used in obtaining nanocomposites can be carried out either by the reflux method or the melting phase method using an internal mixer, while still using additive materials such as compatibility and initiator. The results showed that chemical bond occurred between natural rubber (NR) and polyolefins using NR-g-MA compatibility and peroxide initiator, and also the presence of nanofiller organobentonite that was spread evenly in the natural rubber / polyolefin material had improved the mechanical properties of the nanocomposite.
PENCAMPURAN POLIETILENA DAN KARET ALAM SIR-3L DENGAN DIVINILBENZENA SEBAGAI PENGKOMPATIBILITAS CAMPURAN TERMOPLASTIK ELASTOMER Adiansyah Adiansyah
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 2 No 1 (2018): Volume 2 Nomor 1 Tahun 2018
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Telah dilakukan penelitian pencampuran polietilena dan karet alam SIR-3L dengan divinilbenzena sebagai pengkompatibilizer campuran termoplastik elastomer (TPE). Pencampuran dilakukan tanpa dan dengan penambahan divinilbenzen polietilena/karet alam SIR-3L/dikumil peroksida (b/b) 50 g : 50 g : 1phr, 2phr, dan 3phr. Untuk mengetahui kualitas komposit yang dihasilkan dilakukan analisa uji tarik, diperoleh peningkatan tanpa divinilbenzen maksimum pada variasi konsentrasi polietilena/karet alam SIR-3L/dikumil peroksida adalah 2 phr yaitu kekuatan tarik 2,20 Kgf/mm2 dan kemuluran 12,29 % dan dengan penambahan divinilbenzen diperoleh peningkatan maksimum pada variasi konsentrasi divinilbenzen/dikumil peroksida (b/b) 3 phr : 2phr yaitu kekuatan tarik sebesar 3,31Kgf/mm2 dan kemuluran 28,99 %. Dari hasil analisa SEM diperoleh bahwa penambahan divinilbenzen diperoleh peningkatan permukaan yang lebih rata dan homogen. Dari hasil analisa gugus fungsi dengan FT-IR menunjukkan bahwa campuran divinilbenzen dan polietilena/karet alam SIR-3L/dikumil peroksida hanya merupakan interaksi secara fisik.
STUDI FILTRASI AIR BELIMBING WULUH SEBAGAI ELEKTROLIT BATERAI PENGGANTI ELEKTROLIT H2SO4 Moranain Mungkin; Denny Akbar Tanjung
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 2 (2019): Volume 3 Nomor 2 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Research has been conducted about the study of wuluh starfruit water filtration as a battery electrolyte replacement for H2SO4 electrolytes. During this time the battery electrolyte used H2SO4. While H2SO4 causes itching and sores, it is even toxic to the body when inhaled, so in this research an experiment was conducted to replace electrolyte batteries from vegetable materials, namely using wuluh starfruit water filtration (WSWF). The purpose of this study is to make an environmentally friendly electrolyte alternative. The results showed that the use of battery electrolytes from wuluh starfruit water filtration (WSWF) turned out to be able to react with the battery anode and cathode to produce an electrical voltage of 7.13 volts and an electrical current of 0.56 mA/15 minutes with a light testing load of 12V/5W. The results of this study will be further developed so that it can improve the electrical characteristics of the WSWF electrolyte which is identical to the H2SO4 electrolyte.
PEMANFAATAN LIMBAH KULIT NENAS DAN AMPAS TEBU SEBAGAI BAHAN DASAR DALAM PEMBUATAN KERTAS MENGGUNAKAN BAHAN PENGIKAT PATI LIMBAH KULIT PISANG KEPOK Barita Aritonang; Ahmad Hafizullah Ritonga; Eka Margareth Sinaga
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 3 No 2 (2019): Volume 3 Nomor 2 Tahun 2019
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

This article explains about utilization pineapple leather waste and sugarcane bagasse as a basic material in manufacturing of paper using binder of starch kepok banana leather waste. The research objective is to determine the optimal composition manufacturing of paper from pineapple leather waste and sugarcane bagase with a variation of 80:20% and 70:30% using the alkalization separation method. Based on the results of research that has been carried out, the optimal composition between pineapple leather waste and sugarcane bagasse is 80:20%. The temperature and heating time, and the optimum NaOH concentration is 110 oC for 80 min with sodium hydroxide solution concentration of 2.5%, a pulp content of 74.26%, cellulose content of 84.18%, lignin content of 15.82% and a moisture content of 2.2%. All levels obtained have met the requirements of SNI 14-0444-1989 test for cellulose content, SNI 14-0492-1989 test for lignin content, and SNI 287: 2010 test for moisture content. Based on FT-IR spectrum analysis, pineapple leather waste and sugarcane bagasse are can be used as raw material for manufacturing of paper because of cellulose. This is indicated by the appearance of hydroxyl groups, pineapple leather and sugarcane bagasse which were observed at wave number 3320 cm-1. which shows the presence of cellulose. Based on SEM analysis, it shows that the surface structure of the morphology is getting tighter, it proves that the diameter of the resulting fiber is very small, because the smaller the diameter of the fiber, the better the mechanical properties. Based on the results of grammatical tests, the effect of sodium hydroxide solution concentration and starch binder can improve the mechanical properties, such as tensile index, crack resistance, and tear index. Pineapple leather waste and sugarcane baggase can be used as an alternative raw material to replace wood in manufacturing of paper.

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