Jurnal Periodic
Periodic adalah jurnal nasional yang berisi artikel-artikel bidang ilmu kimia, seperti bidang Kimia Analitik, Kimia Fisika, Kimia Anorganik, Kimia Organik dan Biokimia. Jurnal ini mempublikasikan hasil penelitian original, komunikasi singkat, dan artikel review. Artikel yang telah diterbitkan dalam jurnal ini berarti bahwa kegiatan penelitian yang diterbitkan adalah belum, dan tidak akan diterbitkan di tempat lain. Periodic (e-ISSN 2339-1197) diterbitkan oleh Jurusan Kimia dan mulai tahun 2022 disebut Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang, Indonesia. Periodic terbit berdasarkan berdasarkan surat edaran Direktorat Jenderal Pendidikan Tinggi No. 152/E/T/2012 tentang publikasi karya tulis ilmiah dan terbit sejak Oktober 2012.
Articles
252 Documents
<![CDATA[Inhibisi Korosi Baja oleh Ekstrak Serbuk Gergaji Kayu dalam Medium Air Laut ]]>
<![CDATA[Putri Hartika]]>;
<![CDATA[Yerimadesi Yerimadesi]]>;
<![CDATA[Hardeli Hardeli]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v2i2.3004
<![CDATA[The using of steel support building system in some productions in Indonesia, such us oil refineries, cooling systems production, shipbuilding and marine equipment. The sea is a corrosive environment so the metals which stay in the sea easy to corrosion. One of all effort to reduce the rate of corrosion of steel is the use of organic inhibitors such as tannins, nicotine and lignin. Wood sawdust is one natural ingredient that contains lignin. These compounds can complex with iron. This study aims to utilize wood sawdust extract as corrosion inhibitor of steel in medium of sea. Wood sawdust was extracted by using alkali method. The rate of corrosion and steel corrosion inhibition efficiency with wood sawdust extracts were determined by using the gravimetric method (the reduction of steel weight before and after corrosion). Based on the results of the study showed that the extract of wood sawdust can reduce the corrosion rate of steel in the medium of the sea with corrosion inhibition efficiency of 38.8% on 30 ppm the extract concentration. The analysis of steel surfaces using a stereo microscope with a magnification 40 times. It can seen the difference surfaces between coated steel and uncoated with wood sawdust extract in medium of the sea. Coated steel less rusty than uncoated.]]>
<![CDATA[Analisis Kandungan Besi (Fe) dan Magnesium (Mg) dalam Bijih Besi di Daerah Abai Sangir Kabupaten Solok Selatan Secara Spektrofotometri Serapan Atom ]]>
<![CDATA[Elvira Julita]]>;
<![CDATA[Zul Afkar]]>;
<![CDATA[Iryani Ahmad]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v1i1.549
<![CDATA[Has done research on the determination of iron content (Fe) and magnesium (Mg) in the iron ore Atomic Absorption Spectrophotometric. This study aims to determine the best type of solvent and solvent volume best with ≤ 63μm particle size in determining the content of iron (Fe) and magnesium (Mg) by Atomic Absorption Spectrophotometric and to determine the content of iron (Fe) and magnesium (Mg) in the ore ore. Iron and magnesium content analysis performed by using the method of destruction of wet and conducted some of the variation of solvent variation: concentrated HCl, concentrated HNO3 and HCl - HNO3 concentrated (3:1) or aquaregia as well as the best solvent volume variation is 15 mL, 25 mL, 35 mL , 45 mL and 60 mL. The results showed that the highest iron content obtained by using 25 ml of HCl solvent that is 48.551% at particle size ≤ 63μm and high magnesium levels obtained using 35 mL of solvent aquaregia is 0027% at a particle size ≤ 63 μm.]]>
<![CDATA[Analisis Kadar Logam Timah (Sn) dan Kromium (Cr) pada Susu Kental Manis Kemasan Kaleng dengan Metoda Spektrofotometri Serapan Atom ]]>
<![CDATA[Nadia Wulandari]]>;
<![CDATA[Zul Afkar]]>;
<![CDATA[Desy Kurniawati]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v1i2.2521
<![CDATA[Telah dilakukan penelitian tentang analisis kadar logam timah dan kromium pada susu kental manis kemasan kaleng dengan metoda spektrofotometri serapan atom. Penelitian ini bertujuan untuk mengetahui pengaruh pelarut terhadap kadar logam timah dan kromium pada susu kental manis kemasan kaleng, mengetahui pengaruh masa kadaluarsa dan keutuhan kemasan terhadap kadar logam timah dan kromium serta mengetahui kadar logam timah dan kromium dalam salah satu susu kental manis kemasan kaleng yang beredar dipasaran. Penelitian ini menggunakan metoda destruksi basah, dimana proses pendestruksian dilakukan dengan beberapa variasi yaitu variasi pelarut : HCl pekat, HNO3 pekat dan HCl-HNO3 pekat (3:1), variasi masa kadaluarsa, serta variasi keutuhan kemasan kaleng. Hasil penelitian menunjukan, semua sampel mengandung timah dan kromium. Kadar logam timah tertinggi didapatkan dengan menggunakan pelarut HNO3-HCl, dengan keadaan kaleng rusak dan masa kadaluarsa 1 bulan sesudah kadaluarsa, yaitu 4,989 mg/L. Kadar logam kromium tertinggi didapatkan dengan menggunakan pelarut HNO3-HCl, dengan keadaan kaleng rusak dan masa kadaluarsa 1 bulan sesudah kadaluarsa, yaitu 3,703 mg/L.]]>
<![CDATA[Pembuatan Lapis Tipis TiO2 pada Keramik Dengan Metode Dip Coating untuk Asam Humat ]]>
<![CDATA[Rohadatul Nadya Maurani]]>;
<![CDATA[Rahadian Zainul]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 8, No 1 (2019): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v8i1.104123
<![CDATA[TiO2 thin layer on ceramic with dip coating method and photocatalyst activity test in humic acid. One of the photocatalysts used for the degradation of humic acid is TiO2, because TiO2 has several advantages, including non-toxic, stable, high activity, relatively cheap and environmentally friendlyThis study was performed using TTIP as a precursor and MEA as an additive in isopropanol. Addition of MEA influences the stability of the titanium solution. Ceramics were coated in a 0.5 M TiO2 solution by a dip coating method, then dried in an oven at 110°C for 10 minutes and furnace at 400°C for 2 hours. The maximum degradation of humic acid during 24 hours is 57.73% and in the form of 3.76% using an 8-watt UV lamp.]]>
<![CDATA[Penentuan Kadar Etanol Pada Sampel Minuman dengan Metoda HPLC Menggunakan Fasa Gerak Asetonitril dan Buffer Fosfat ]]>
<![CDATA[Nailul Rahmi]]>;
<![CDATA[Budhi Oktavia]]>;
<![CDATA[Nazulis Z]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 2, No 1 (2013) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v2i1.2373
<![CDATA[Alcoholic beverage is a drink containing ethanol. Ethanol is a psychoactive substance and its consumption causes loss of consciousness. All types of alcohol are essentially toxic, especially if consumed in excess, such as ethanol. According to BPOM limit of the use of alcohol in drinks are ± 1% - 5%. Ethanol content analysis in this study using HPLC method with condition UV-Vis using a mobile phase of acetonitrile: phosphate buffer (5: 95) pH 6 at 220nm wavelength detector and the use of stationary phase Zorbax Rx C18 ODS column. The result of this method is retention time for ethanol 1.68 minutes. The aplication of the method for determination of ethanol on the drinks from the market for 5 different samples was tested. The sample consists of 3 types of alcoholic beverage production factory/industrial, and 2 types of alcoholic beverages produced household. With adition standard techniques on samples was obtained ethanol adduct levels in 2 samples are 20.416% and 3.80%]]>
<![CDATA[Studi Kopresipitasi Co(II) Menggunakan Kopresipitan Al(OH)3 Secara Spektrofotometri Serapan Atom (SSA) ]]>
<![CDATA[Monika Yulia]]>;
<![CDATA[Indang Dewata]]>;
<![CDATA[Edi Nasra]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v2i2.3034
<![CDATA[Has conducted research on the study of coprecipitation Co(II) using copresipitan Al(OH)3 by Atomic Absorption Spectrophotometry. This study aims to find the optimum conditions such as pH coprecipitation, volume of coprecipitan and the volume of nitric acid as eluent and to see efect of Ni(II) to coprecipitation Co(II). Results of analysis using SSA coprecipitation prove that the optimum conditions obtained in a relatively at base pH of the solution that is pH 8, where the condition is colloidal Al(OH)3 formed maximum. At acidic pH colloid formation process is not maximized, while at higher pH colloids formed will dissolve again into tetra hidroksoaluminat ions. Maximum Coprecipitan volume occurs at 12 mL Al3+ 0,2 M, which is the case in vulome maximum absorption of Co2+ 50 mL 1 ppm by 2,0 mmol colloidal Al(OH)3 while at higher volumes there is a reduction of the metal cation uptake due to competition between the Al metal is more electropositive and have fingers ion is smaller than the cations Co(II). The optimum conditions of volume nitric acid as eluent occurred on volume of 1 mL with absorption capacity by Al3 was 0.0905 mg / g, where as in the volume of eluent managed to extract maximum metal cations while the volume is higher dilution solution causes a decrease in the concentration of metal cations soluble in the eluent. The addition of nickel metal ions affect coprecipitation of metal kobalt because cobalt and nickel is a 3d transition which has a tendency of the same characteristic.]]>
<![CDATA[Penggunaan NaOH Sebagai Leaching Agent Dan Pengaruh Penambahan H2O2 Pada Desulfurisasi Petroleum Coke ]]>
<![CDATA[Mawardi Anwar]]>;
<![CDATA[Amrin .]]>;
<![CDATA[Eliza Fitri]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 2, No 1 (2013) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v2i1.1927
<![CDATA[A study on the use of NaOH as the leaching agent and the effect of adding H2O2 in desulfurization of petroleum coke. This study aimed to observe the effect of concentration and stirring time on the desulfurization of petroleum coke using NaOH as the leaching agent, and determine the effectiveness of the use of NaOH as a leaching agent in optimum condition in the desulfurization of petroleum coke and see the effect of the addition of H2O2 by leaching method using NaOH. Research on separation of sulfur petroleum coke leaching method performed on samples derived from petroleum coke PT.Pertamina UP II Dumai 0440% sulfur content. To determine the sulfur content in petroleum coke after leaching were analyzed using X-Ray Flouroscence (XRF). In this separation studied the influence of the concentration of NaOH as the leaching agent and the effect of stirring time on levels of sulfur that can be separated. The results showed that the concentrations of NaOH and optimum stirring time, which can be separated sulfur content is 26%. This research also studied the effect of adding H2O2 at the optimum conditions. The results showed 1.5% H2O2 concentration can separate the sulfur in petroleum coke amounted to 1.82%. From the research it can be concluded that the influence of the concentration and time of agitation increases levels of sulfur extracted until a certain optimum value of 75% and 60 min, while the addition of high concentrations of H2O2 less effective. The addition of 1.5% H2O2 can significantly reduce levels of sulfur are extracted at the 90% confidence level.]]>
<![CDATA[DEGRADASI METHYL VIOLET SECARA FOTOLISIS DAN SONOLISIS DENGAN KATALIS TiO2/SiO2 ]]>
<![CDATA[Belina Harnum]]>;
<![CDATA[Hardeli Hardeli]]>;
<![CDATA[Hary Sanjaya]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v2i2.3025
<![CDATA[Degradation of methyl violet dye had been done by photolysis and sonolysis with adding TiO2/SiO2 catalyst. This study aims to determine the optimum time for degradation and optimum dopan silica (SiO2). Photolysis method were performed using an irradiation of UV light l= 254 nm and sonolysis using an ultrasound with frequency 45 kHz. Result methyl violet degradation products obtained under optimum conditions identified by GC-MS. The optimum time for degradation of methyl violet photolysis is 270 minutes, the addition of silica optimum dopan occurs on addition of 25% SiO2, with percentage of degradation (%D) is 96.52%. The optimum time in the degradation of methyl violet in sonolysis photolysis is 270 minutes and the addition of silica optimum dopan occurs on addition of 25% SiO2, with percentage of degradation (% D) is 76.19%. Identification of the GC-MS results obtained showed many peaks that have occurred in the degradation of methyl violet molecules.]]>
<![CDATA[Sintesis dan Karakterisasi Plastik Ramah Lingkungan dari Nata de manihot ]]>
<![CDATA[Mia Oktarina]]>;
<![CDATA[Iryani Ahmad]]>;
<![CDATA[Iswendi Thabrani]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v1i1.559
<![CDATA[Plastic is a materials which required in everyday. But its use generate various problem, especially if the plastic used as packer of food. Usage of plastic directly can give negative impact to health. To overcome the negative impact done by effort one of them making of environment friendly plastic from natural materials like nata de manihot. The aim of this research are syntesis plastic sheet from nata de manihot, knowing the physical and morphology, and time relation with power of biodegradation. This research early with making of nata de manihot and nata de coco used as comparator. Measured nata’s thickness, then in press so that form sheet of nata flimsy which still wet. After that, immersion during 14 day in gliserol with concentration variation of 1%, 2%, 3%, and pa. This sheet is dried in the oven at temperature ± 70, so that yielded sheet of nata which in form of plastic sheet. Its Morphology is analysed by SEM ( Scanning Electron Microscope), its power of biodegradation tested with burying in ground during 8 days, and each every 2 days measured by weight of rest of plastic sheet. Pursuant to result of research obtained plastic sheet of nata which is soaked in gliserol at concentration 3% yielding more flexible and more transparent compared to other concentration. Total biodegradation of plastic nata de manihot is over in 8 days.]]>
<![CDATA[Analisis Kadar Logam Timbal (Pb) dan Tembaga (Cu) pada Susu Kental Manis Kemasan Kaleng dengan Metoda Spektrofotometri Serapan Atom ]]>
<![CDATA[Vina Dewisartika]]>;
<![CDATA[Zul Afkar]]>;
<![CDATA[Yerimadesi Yerimadesi]]>
<![CDATA[ Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012) ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/p.v1i2.2526
<![CDATA[Telah dilakukan penelitian tentang Analisis Kadar Logam Timbal (Pb) dan Tembaga (Cu) pada Susu Kental Manis Kemasan Kaleng dengan Metoda Spektrofotometri Serapan Atom. Penelitian ini bertujuan untuk mengetahui pengaruh pelarut terhadap kadar logam timbal (Pb) dan tembaga (Cu) dalam susu kental manis kemasan kaleng, mengetahui pengaruh masa kadaluarsa dan keutuhan kemasan terhadap kadar logam timbal (Pb) dan tembaga (Cu), serta mengetahui kadar logam timbal (Pb) dan tembaga (Cu) dalam salah satu susu kental manis kemasan kaleng yang beredar di pasaran. Analisis kadar timbal (Pb) dan tembaga (Cu) dilakukan dengan menggunakan metoda destruksi basah dan dilakukan beberapa variasi yaitu variasi pelarut, variasi masa kadaluarsa serta variasi keutuhan kemasan kaleng. Hasil penelitian menunjukkan bahwa semua sampel mengandung timbal (Pb) dan tembaga (Cu). Kadar timbal (Pb) tertinggi didapatkan dengan menggunakan pelarut aquaregia, dengan keadaan kaleng rusak dan masa kadaluarsa satu bulan setelah kadaluarsa yaitu 4,548 mg/L. Kadar tembaga (Cu) tertinggi didapatkan dengan menggunakan pelarut aquaregia, dengan keadaan kaleng rusak dan masa kadaluarsa satu bulan setelah kadaluarsa yaitu 4,491 mg/L.]]>
