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Budhi Oktavia
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Jurnal Periodic Jurusan Kimia UNP
Published by Universitas Negeri Padang
ISSN : -     EISSN : 23391197     DOI : https://doi.org/10.24036/p.v11i2.113715
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
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.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 343 Documents
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Analisis Kadar Siklamat dan Aspartam pada Minuman Ringan Menggunakan HPLC dengan Fasa Gerak Metanol-Buffer Phospat Aulya Rahmah; Budhi Oktavia; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.462 KB) | DOI: 10.24036/p.v1i2.2513

Abstract

Siklamat dan aspartam merupakan pemanis buatan yang digunakan sebagai penegas cita rasa (flavor enhancer) terutama cita rasa buah. Siklamat dan aspartam ini sering di gunakan sebagai zat tambahan dalam bahan makanan dan minuman yang beredar di pasaran,sehingga dapat di konsumsi oleh masyarakat. Kadar yang diperbolehkan  untuk mengkonsumsi siklamat dan aspartam masing-masing adalah 11 mg/kg dan 40 mg/kg berat badan. Untuk itu, diperlukan suatu metoda yang efektif dalam menganalisis kadar siklamat dan aspartam pada makanan dan minuman tersebut. Analisis kadar siklamat dan aspartam pada penelitian ini menggunakan metoda HPLC detektor UV_Vis dengan menggunakan fasa gerak metanol : buffer phospat (20 : 80) dan fasa diamnya menggunakan kolom ODS C18. pH buffer phospat yang digunakan adalah 6,2 pada panjang gelombang 263nm. Dimana waktu retensi untuk siklamat dan aspartam masing-masing adalah 6,67 menit dan 5,20 menit. Kadar siklamat pada minuman yang beredar di pasaran terdapat pada 4 macam sampel dari 5 macam sampel yang diuji, dimana kadar tertinggi terdapat pada sampel B dengan kadar 794,1  ppm. Sementara aspartam, dari 5 sampel yang di uji tidak satupun yang mengandung aspartam. Sedangkan untuk sampel yang beredar di sekolahan, dari 3 sampel yang di uji, tidak satupun yang mengandung siklamat dan aspartam.
Isolasi dan Karakterisasi Flavonoid dari Daun Kapuk (Ceiba pentandra L.) Putri Diana; Nazulis Z; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (278.714 KB) | DOI: 10.24036/p.v2i2.3035

Abstract

Have been done the isolation of flavonoids from the leaves of the kapok (Ceiba pentandra L.) in Chemical Research Laboratory, Faculty of mathematics ande Natural Sciences of the State University of Padang. This research aims to isolate and to know the characteristics of the flavonoid compounds from the leaves of kapok. Method of insulationus is maceration with methanol, followed by oil with n-hexane and ethyl acetate. Separation of the ethyl acetate fraction by coloumn chromatography using silica, eluen used ethylacetate : methanol in SGP. Test the purity of the insulation is done with KLT and melting point. Flavonoids obtained pure white-brownish powder with melting point range 263,3-263,8 0C. Test result with 10% NaOH color reagents, concentrated H2SO4 andMg-HCl showed the presence offlavonoids. Results test KKt2A bares stain is at regional aglikon flavon. The data analysis spectra IR showed the groups –OH ether, C=C aromatis and carbonyl C=O. While of spectra uv-vis the presence of a cluster of -OH on C-3. From the data up allegedly flavonoid the result of isolation is a flavone with a cluster of –OH on C-3 namely 3-hidroksiflavon.
Pengaruh Equilibrium Kandungan Air Batubara Halus Terhadap Nilai Kalor Bakar Batubara Halus (Fine Coal) Mawardi Anwar; Hary Sanjaya; Meyci Trisna
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 1 (2013)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (555.57 KB) | DOI: 10.24036/p.v2i1.1928

Abstract

The increasing of requirement of domestic cement for a number of years will affect directly to usage of coal as especial fuel for cement production. So that Important to know the usage condition of coal yielding coal with superordinate calorivic value, with better economic value, and smaller negative impact to environment, where with slimmer usage amount of coal better yield coal with higher calorivic value because more and more amount of used coal also will improve the waste that able to influence environment. Have been researched water equilibrium of fine coal with aim to lessen the amount of fine coal usage for cement production process, because from data result of research got calorivic value which mounting of fine coal after done equilibrium of water content in fine coal. Fine coal sample before and after obstetrical equilibrium of its water is determined change of that calorivic value (Cal/g) use Bomb Calorimeter PARR 1261, content of water (%) use Moisture Analyzer, content of sulphur (%), and its dusty content. Result of which is got that after water equilibrium happened minimizing the mass of fine coal’s sample, after done the determination of water content happened minimizing of water content that is equal to 3.14% or happened minimizing that equal to 17% from water content before equilibrium. While for the calorivic value increase until 189 Cal/g or happened increase equal to 3% from calorivic value of sample before equilibrium, for sulphur and dusty content happened increase successively equal to 7% and 5% from content of sample before equilibrium.
ANALISIS KANDUNGAN KADMIUM (Cd) DAN SENG (Zn) DALAM KUBIS BUNGA (Brassica oleracea var. botrytis L) DENGAN METODE SPEKTROFOTOMETRI SERAPAN ATOM Deski Pahdinol; Amrin Amrin; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (239.808 KB) | DOI: 10.24036/p.v2i2.3026

Abstract

Flowers cabbage (Brassica oleracea var. botrytis L) is an important and widely grown vegetable in many places. Soil as the growth of vegetables such as flowers cabbage can be contaminated media by harmful substances, such as heavy metals like cadmium (Cd) and zinc (Zn). Analysis of cadmium and zinc contents in flowers cabbage in the Koto Baru in Tanah Datar and Padang Lua in Agam by Atomic Absorption Spectrophotometry has been done. This study aims to determine the content of cadmium (Cd) and zinc (Zn) in flowers cabbage and to know what kind of a good solvent on the analysis of the content of cadmium (Cd) and zinc (Zn) in flowers cabbage by Atomic Absorption Spectrophotometry. This study uses a wet destruction, where the destruction process done with some variation of the solvent variation: HClO4 p.a, HNO3 p.a and HNO3-HClO4 mixture (4:1). Research results showed that local flowers cabbage in Koto Baru Tanah Datar and Padang Lua Agam is still below the safety limit but still have to watch out for. Good solvent for analysis of Cd metal content in the sample flowers cabbage  for Koto Baru area of ​​Tanah Datar is HNO3-HClO4 mixture (4:1) for a Padang Lua, Agam is HClO4 p.a good solvent for analysis of Zn metal content in the sample flowers cabbage for Koto Baru area of ​​Tanah Datar and Agam, Padang Lua is HNO3-HClO4 mixture.
Penentuan Kondisi Optimum Jumlah Pelapisan dan Lama Penyinaran Proses Degradasi Zat Warna Methylene Blue Pada Reaktor Fotokatalitik TiO2 dengan Penambahan SiO2 Nopri Andriko; Hardeli Hamzah; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (312.87 KB) | DOI: 10.24036/p.v1i1.561

Abstract

Penelitian ini bertujuan menentukan lama penyinaran dan pelapisan optimum reaktor fotokatalitik TiO2/ SiO2 untuk mendegradasi zat warna Methylene Blue. Penelitian ini menggunakan rancangan acak lengkap dengan 2 faktor. Faktor pertama adalah jumlah pelapisan dan faktor kedua adalah lama penyinaran. Pada penelitian ini, digunakan TiO2 Degussa P-25 dengan penambahan SiO2 yang berguna untuk mencegah terjadinya rekombinan antara e- dan h+. Methylene Blue yang terdegradasi diukur menggunakan spektrofotometer UV-Vis dan produk degradasi yang terbentuk pada kondisi optimum diidentifikasi menggunakan GC-MS. Hasil penelitian menunjukkan bahwa kondisi optimum untuk mendegradasi Methylene Blue 5 ppm dicapai pada pelapisan 5 kali dan lama penyinaran 5 jam. Pada kondisi ini diperoleh persentase degradasi sebesar 87.61%. Identifikasi dengan GC-MS menunjukkan banyak puncak yang saling tumpang tindih yang menandakan Methylene Blue telah mengalami degradasi. Hasil karakterisasi dengan XRD menunjukkan bahwa Kristal TiO2/ SiO2 merupakan campuran anatase dan rutile, dan dari perhitungan didapatkan ukuran kristalnya sebesar 19,099444 nm.
Analisis Silikon (Si) dan Magnesium (Mg) dalam Tanah Lempung di Kabupaten Tanah Datar Secara Spektrofotometri Serapan Atom Wiwit Angraini; Amrin Amrin; Bahrizal Bahrizal
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.346 KB) | DOI: 10.24036/p.v1i2.2527

Abstract

Telah dilakukan penelitian tentang analisis silikon dan magnesium dalam tanah lempung yang terdapat di Kabupaten Tanah Datar secara Spektrofotometri Serapan Atom. Penelitian ini bertujuan untuk menentukan kandungan silikon (Si) dan magnesium (Mg) dengan jenis pelarut, ukuran partikel dan konsentrasi pelarut terbaik secara spektrofotometri serapan atom. Analisis silikon dan magnesium dilakukan dengan menggunakan metoda destruksi basah, dimana proses pendestruksian dilakukan dengan beberapa variasi yaitu variasi pelarut : HF, HCl pekat, HNO3 pekat, dan HCl-HNO3 pekat (3:1), variasi ukuran partikel yaitu ≤ 63 μm, > 63 - ≤ 75 μm, dan > 75 - ≤ 90 μm serta variasi konsentrasi pelarut HF yaitu 23 M, 18 M, 12 M, 6 M dan variasi konsentrasi pelarut HCl yaitu 12 M, 9 M, 6 M dan 3 M. Hasil penelitian menunjukkan bahwa kandungan silikon terbaik didapatkan menggunakan pelarut HF 12 M dengan ukuran partikel ≤63µm yaitu 26,79% dan kandungan magnesium terbaik didapatkan menggunakan pelarut HCl 9 M dengan ukuran partikel ≤63 µm yaitu 1,08%.
MAKING DYE SENSITIZED SOLAR CELL (DSSC) USING GMR AS SUBSTRACT AND PURPLE SWEET POTATO EXSTRACT (Ipomoea batatas L) AS A D DYE SENSITIZER Utami Oktavia; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1421.844 KB) | DOI: 10.24036/p.v8i1.105061

Abstract

Dye Sensitized Solar Cell (DSSC) is a third generation photovoltaic cell that configures visible light into electrical energy. This  study aims  to make DSSC using GMR as  substrate with spin coating gel solvents and natural dyes from purple sweet potato (Ipomoea batatas L). From  testing the purple sweet potato is known to contain anthocyanin compounds in testing using FTIR and has a maximum wavelength of 525 nm in testing Uv-Vis. From the results of the calculation of efficiency with  immersion obtained at a concentration of 50% the efficiency is 0.19%, while the variation in immersion time is 5 hours of efficiency 0.72%.
Studi Penyerapan Ion Pb2+ oleh Zeolit 4A yang Disintesis dari Abu Terbang Adzanal Maghribhi; Bahrizal Rizal; Yerimadesi Busmairizal
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (212.47 KB) | DOI: 10.24036/p.v1i1.545

Abstract

Research of study adsorption of ion Pb2+ by zeolite 4A has been done. This study aims to determine maximum of pH and concentration of Pb2+ for adsorption by zeolite 4A. This study uses variation pH of 4,8; 5,0; 5,2; 5,4 and 5.6; and variation concentrations of 40, 45, 50, 55, 60 and 65 ppm. Concentration of the adsorbed Pb2+ was calculated from the difference between the initial Pb2+ before the adsorption with the residual concentration of Pb2+ (measured). Measurement of residual concentration of Pb2+ using Atomic Absorption Spectroscopy (AAS). The result showed the maximum pH is 5,4 by the adsorption capacity is 14.7511 mg/g zeolite, and maximum initial concentration of Pb2+ by the adsorption capacity is 15.6438 mg/g zeolite.
Studi Inhibisi Korosi Baja oleh Ekstrak Biji Kakao (Theobroma cacao) dalam Medium Udara Indah Muspita; Irma Mon; Yerimadesi Yerimadesi
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v1i2.2518

Abstract

Steel very easily have corrosion in the air (atmosphere corrosion), this led to the decline of quality steel. Therefore, Inhibition of steel Corrosion Study performed by the extract of Cocoa (Theobroma cacao) in the Medium of air which aims to look at the influences of the cocoa seed extract inhibition of corrosion of steel in the medium of air.This research uses a method of reduction of weight (weight loss), identification of compound steel absorbed on the surface of steel using a FTIR spectrometer, analysis of the steel surface and done using stereo microscopes. Of research results obtained that the cacao seed extract may decrease the rate of corrosion of steel in the air with corrosion inhibition efficiency 89,46%. Increased efficiency due to the lack of inhibition adsorption on cocoa extract steel surface that has been evidenced by the results of the FTIR. Surface analysis of steel with a microscope shows the difference of surface state of specimens not coated and coated cocoa extract solution.
Potensi Na2SiO3 yang disintesis dari Batu Tuff sebagai bahan dasar Sintesis Silika Mesopori Muhammad Iqbal Alzain; Syamsi Aini; Ridha Santika
Jurnal Periodic Jurusan Kimia UNP Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (973.455 KB) | DOI: 10.24036/p.v8i1.104928

Abstract

Mesoporous silica was synthesized using sodium silicate obtained from tuff stones Indarung hills in Padang, Indonesia. Mesoporous silica was synthesized  from sodium silicate and P104 as surfactant in acid condition. The result from characterization using spectrofottometer Fourier Transform Infrared (FTIR) are shown wavelength at 806 cm-1, 1058 cm-1, 1647 cm-1, and 3476 cm-1 that indicates mesoporous silica.  FTIR data were strengthened using XRD with a wide and low diffractogram at 2θ=22°. The results show that tuff stones have potential  to be used  as a precrusor for synthesis mesoporous silica.

Page 5 of 35 | Total Record : 343

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