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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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Penggunaan HCl Sebagai Leaching Agent Dan Pengaruh Penambahan H2O2 Pada Desulfurisasi Green Coke Mawardi Anwar; Zul Afkar; Dekna Aswita
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 (474.084 KB) | DOI: 10.24036/p.v2i1.1926

Abstract

Desulfurization research on green coke of Refinery Unit II Dumai production with 0.44% sulfur content has been done. The purpose of this research is to study the performance of leaching  method on green coke desulfurization and find out the effect of HCl concentration, stirring time and the effect of the addition of H2O2 to the green coke desulfurization. In this study obtained the optimum concentration of HCl as the leaching agent is 9 M. The results showed that the stirring time of 60 minutes and 9 M HCl concentration, levels of sulfur that can be separated is 3.58%. Then conducted leaching at the optimum conditions with the addition of 6% H2O2.  Levels of sulfur that can be separated by the addition of H2O2 is 3.68%. In this research, the addition of H2O2 increased  percent of desulfurization.
OPTIMASI TANAH NAPA SEBAGAI ADSORBEN ION LOGAM Cd (II) Atina Khairat; Mawardi Mawardi; Hary Sanjaya
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 (295.715 KB) | DOI: 10.24036/p.v2i2.3024

Abstract

The effort of handing waste which containing heavy metals examined continuesly, once of effort is adsorption method. In the research, examined about optimum condition determinating of metal ion Cd (II) adsorption by Napa soil adsorption from Solok The Aripan’s area. The napa containts silica 70,979 % and alumina 20,748 %, the amount of silica and alumina in napa almost equals it’s concentration with natural zeolite. The purpose of research is to determine the effect of napa maximum adsorption capacity on metal ions Cd (II), as well as the effect of initial concentration solution, pH solution, particle size of adsorbent, heating temperature adsorbent and flow rate eluent. The research was conducted in two phases, that is the preparation and conduct of the examined. The preparation stage includes the prepare of the tools, materials and samples. The implementation stage begins with a preparation of samples, then used it as the metal ion adsorbents Cd (II). Measurement of the ions Cd (II) concentration conducted with SSA at wavelength 283,3 nm. These results indicate that the optimum initial concentration is 150 mg/L, pH solution is 4, while the particle size is 850 ʮm, temperature of heating the adsorbent is 125 0C, and the flow rate is 20 drops/minute. By using the langmuir adsorption isotherm equation obtained maximum adsorption capacity of the napa metal ions Cd (II) is equal to 0,999 mg/g. The adsorption of metal ions Cd (II) at waste water in Chemical Laboratory Mathematic and saint Faculty UNP has adsorption efficiency 68,72 %.
Karakteristik Uji Blaine, Konsistensi Normal dan Waktu Pengikatan Semen yang Menggunakan Tanah Napa Sebagai Bahan Adiktif Mawardi Anwar; Riri Nofrita; Desy Kurniawati
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 (246.186 KB) | DOI: 10.24036/p.v1i1.557

Abstract

It has been investigated about the analysis of characteristic, of cement which used the natural pozzolan in Aripan Solok region in analyzing the blaine, normal consistency and setting time. This research is aimed to recognize the infuencial characteristic of additional natural pozzolan to setting time, blaine and normal consistency. The testing characteristic of natural pozzolan to cement used devices vicat and blaine, the testing pracess was done in some variatation of percentage of 0%, 5% and 9.5 %. The result ot the reseach indicated that the characteristic of addition of natural pozzolan to cement which fulfil SNI 152049-2004 could make the setting time longer in cement hidration and it needed a big volume of water as the normal consistensy. Addition of natural pozzolan in cement will influence the blaine of cement it tells about the maximal addition of natural pozzolan 9.5 %to indicates the blaine of cement to be rough.
Penentuan Kondisi Optimum Proses Degradasi Zat Warna Methylene Blue Pada Reaktor Fotokatalitik TiO2 – PEG Rezki Pratama; Hardeli Hardeli; 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 | Full PDF (364.458 KB) | DOI: 10.24036/p.v1i2.2525

Abstract

Methylene Blue merupakan zat warna dasar yang penting dalam proses pewarnaan kulit, kain mori, dan kain katun. Pembuangan zat warna ini ke lingkungan perairan menjadi ancaman serius bagi organism aquatik di dalamnya. Proses fotokatalitik dengan semikonduktor TiO2 merupakan teknologi yang potensial dalam memineralisasi zat-zat berbahaya yang sulit dibiodegradasi. Penelitian ini bertujuan menentukan jumlah kolom gelas dan lama penyinaran optimum  reaktor fotokatalitik guna mendegradasi zat warna Methylene Blue 5 ppm. Dalam penelitian ini, digunakan TiO2 Degussa P 25 dengan penambahan zat aditif PEG guna memperbaiki sifat-sifat katalis. Penelitian ini menggunakan dua varibel yaitu varibel pertama adalah  lama penyinaran, dengan 7 variasi waktu. Varibel kedua adalah jumlah kolom gelas dengan 6 variasi kolom gelas. Setelah dilakukan proses degradasi, absorbansi Methylene Blue diukur menggunakan spektrofotometer UV-Vis dan produk degradasi yang terbentuk pada kondisi optimum diidentifikasi menggunakan GC-MS. Dari hasil penelitian didapatkan kondisi optimum  reaktor fotokatalitik yaitu pada jumlah kolom gelas 10 buah dan lama penyinaran selama 6 jam. Pada kondisi ini diperoleh persentase degradasi sebesar 79,49 %. Hasil karakterisasi dengan XRD menunjukkan TiO2 Degussa P-25 merupakan campuran anatase dan rutile dengan ukuran Kristal sebesar 20,571558 nm. Identifikasi dengan GC-MS menunjukkan banyak puncak yang saling tumpang tindih yang menandakan Methylene Blue telah mengalami degradasi.
Kajian pH untuk Sintesis Silika Mesopori pada Permukaan Campuran Nanopartikel Magnet Fe3O4 dan Fe2O3 dari Pasir Besi dan Sodium Silikat Nadia Rahma; Syamsi Aini
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 (570.832 KB) | DOI: 10.24036/p.v8i1.104967

Abstract

Abstrak - Nanopartikel Fe3O4 dari pasir besi merupakan salah satu partikel magnetik memiliki karakteristik yang menarik seperti sifat kemagnetan, optis dan katalitiknya, serta banyak digunakan dalam berbagai aplikasi antara lain magnetic resonance imaging (MRI), pemisah logam berat untuk pemurnian air, hypertemia theraphy system. Namun, nanopartikel besi tidak stabil bila digunakan langsung sebagai katalis, hingga perlu penstabil silika. Sintesis SiO2 pada permukaan Campuran nanopartikel Fe3O4 dan Fe2O3 dilakukan dengan menggunakan nanopartikel Fe3O4 hasil dari pasir besi Sijunjung. Sintesis SiO2 pada permukaan  Campuran nanopartikel Fe3O4dan Fe2O3  dilakukan menggunakan metode Sol-Gel. Sintesis dilakukan untuk mengkaji pengaruh pH (7, 9 dan 11) terhadap keberadaan silika mesopori pada permukaan nanopartikel magnet Fe3O4@SiO2. Senyawa hasil dikarakterisasi menggunakan XRD (X-Ray Diffraction). Keberadaan silika pada permukaan campuran nanopartikel  Fe3O4 dan Fe2O3 mulai teramati pada kondisi pH 11  ditunjukkan dengan adanya puncak lebar dan rendah pada 2θ = 26.  Kata Kunci - Nanopartikel Fe3O4, Fe2O3  dan Silika Mesopori,
Pengaruh Asap Cair Sabut Pinang (Areca catechu L) Terhadap Kadar Protein Udang (Crustacae) yang Disimpan pada Suhu 50C Faratika Agustin; Iryani Iryani; Isniyetti Isniyetti
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 (207.309 KB) | DOI: 10.24036/p.v1i2.2516

Abstract

A study on the effect of liquid smoke fibrous shell of areca nut (Areca catechu L) the protein content of shrimp stored at a temperature of 50oC. The purpose of this study was to see the effect of liquid smoke concentration and length of storage the protein content of shrimp. This study begins with shrimp dipping into different concentrations and stored with variety and storage time of shrimp used as control without giving liquid smoke. Observations made ​​during the 15 days of the smell, color, texture and protein content of shrimp. Shrimp protein content determined by the method of Lowry. Based on the results of the study can be seen a decline in the quality of the shrimp as changes in odor, color and texture. From the results of the determination of the protein content of shrimp with giving liquid smoke have a higher protein content when compared to the shrimp without giving of liquid smoke. Liquid smoke concentration and sample storage time best in this study was 15% liquid smoke concentration with storage time 3 days.
Uji Bioaktivitas Ekstrak Etil Asetat Kulit Manggis (Garcinia mangostana L.) sebagai Antidiabetes pada Mencit Putih (Mus musculus L.) Jantan Sri Hastuti Siregar; Iryani Iryani; Erda Sofjeni
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 (240.686 KB) | DOI: 10.24036/p.v2i2.3038

Abstract

Diabetes mellitus represents a disease marked with blood glucose level that exceeding situation of normal boundary ( hiperglikemia). Treatment of this disease can be done with medicall and alternativety. Medication of alternativety by using materials of flora owning effect of hipoglikemia like ethyl acetate extract of mangosteen rind (Garcinia mangostana L.). This study about activity determination of antidiabetes ethyl acetate extract of mangosteen rind. This study to know influence giving of ethyl acetate extract mangosteen rind to degradation of blood glucose level of the white male mice (Mus musculus L.), and to determine effective treatment time and dose to blood glucose level of the white male mice. Glucose blood levels determined with glucose tolerance method use appliance of NESCO Multicheck Glucose®. Dose variation ethyl acetate extract of mangosteen rind the used 125, 250 and 500 mg/kg BW with time variation of 60, 90, 120, and 150 minutes. The decreasing blood glucose of analysed statistically by using analysis of variant (ANOVA) and followed by Duncan’s multiple reng test. The decreasing result of examination of KGD (blood glucose level) with dose 125, 250 and 500 mg/kg BW give effect of blood glucose levels  meaning, where calculated F value > critical F value. Price of calculated F value is 6,25, while critical F value is 4,77 (0,01 α). Dose of ethyl acetate extract mangosteen rind that gives the highest blood glucose level 20,4 % is 500 mg/kg BW with time a time of ethyl acetate extracts of mangosteen rind 150 minutes.
Pengaruh Ion Logam Cd (II) Terhadap Adsorpsi Ion Logam Pb (II) dengan Adsorben Tanah Napa Mawardi Anwar; Hary Sanjaya; Azhar Maliki
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 (610.544 KB) | DOI: 10.24036/p.v2i1.1931

Abstract

Research has been done about influence of the presence of metal ions Cd (II) on the adsorption of metal ions Pb (II) by using adsorbents napa land from areas Aripan, South Solok. Napa soil contains 63.20% of silica and alumina 16:55%, it was lmost  same as the content of silica and alumina in  zeolite nature so that it can be used as an adsorbent. In this research studied the influence of  presence of metal ions Cd (II) metal ions on the absorption of Pb (II) with some parameters, such as the initial concentration of the solution, the addition of metal ions Cd (II), pH and temperature of heating the adsorbent. Then also studied the regeneration of both metals by using a solution of 1% HNO3. These results indicate that the presence of metal ions Cd (II) decrease the absorption of the metal ions Pb (II). The optimum concentration of metal ion uptake of Pb (II) was 150 mg / L, the optimum concentration of the addition of metal ions Cd (II) is ½ times of concentration of metal ions Pb (II). The optimum pH for metal ions Pb (II) was 5 and 6 for the metal ions Cd (II). While the optimum  adsorbent heating temperature is 125 ° C, and the percentage of regenerating metal ions Pb (II) was 64 326% and Cd (II) was 38 675%.
Optimasi Analisa Kadar ß Karoten Dalam Jagung (Zea mays.L) Dengan Metoda HPLC Terhadap Pengaruh Lama Perebusan, Variasi Eluen Dan Kolom Endang Widaya Nengsih; Budhi Oktavia; 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 (308.801 KB) | DOI: 10.24036/p.v2i2.3029

Abstract

Corn contains a variety of important chemical compounds; one of them is vitamin A. Nowadays, a shortage of vitamin A becomes a problem for people in whole the world, especially for developing countries, including Indonesia. However, this problem can be reduced by increasing pro-vitamin A which is the precursor of vitamin A. The Pro-vitamin A is obtained from one of Indonesian staple food. It is corn. Unfortunately, the cooking process of corn can reduce the content of vitamin A precursors or β-carotene. The effect of boiling on β-carotene content can be analyzed by HPLC method, a UV-Vis detector at wavelength of 449 nm with C-8 column and an organic solvent of methanol 100%. Retention time for β-carotene is 6, 20 minutes. The effect of long boiling toward decreasing of β-carotene contents has been tested in this research. The result of β-carotene contents for long boiling in 20 minutes and 30 minutes after boiling process are 56, 02% and 68, 32%.
Analisis Kadar Kafein dan Sakarin pada Minuman Ringan dengan Fasa Gerak Metanol-Buffer Asetat Menggunakan HPLC Reviana Ervita; Budhi Oktavia; Desy Kurniawati
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 (256.177 KB) | DOI: 10.24036/p.v1i1.567

Abstract

Pada penelitian ini dilakukan analisis kadar kafein dan sakarin menggunakan metode HPLC detektor UV-Vis, metanol-buffer asetat digunakan sebagai fasa gerak dan kolom ODS C18 sebagai fasa diam. Berdasarkan hasil penelitian didapatkan kondisi optimum untuk penentuan kafein dan sakarin dengan fasa gerak metanol:buffer asetat (30:70) adalah pada pH 5,0 pada panjang gelombang (lmaks)270 nm. Sakarin dan kafein memberikan waktu retensi secara berturut-turut 4,35 menit dan 8,42 menit. Sampel diberi kode sesuai dengan huruf alfabet yaitu: A, B, C, D, E, F, G, H, I, dan J. Kadar kafein tertinggi terdapat pada sampel berkode E dengan konsentrasi 383,62 ppm dan kadar sakarin tertinggi terdapat pada sampel G dengan konsentrasi 15551,23 ppm.

Page 2 of 35 | Total Record : 343

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