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Jurnal Periodic Jurusan Kimia UNP

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Published by Universitas Negeri Padang

ISSN : - EISSN : 23391197 DOI : https://doi.org/10.24036/p.v11i2.113715

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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Uji Daya Hambat Asap Cair Sabut Pinang terhadap Pertumbuhan Bakteri Bacillus cereus dan Pseudomonas aeruginosa Iryani .; Suryelita .; Dwi Kurnia Putri
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 1 (2013)
Publisher : Departemen Kimia FMIPA UNP

This research was to study about influence of increasing consentrations of areca catechu’s liquid smoke for inhibit phatogenic and food spoilage bacteria activities by using paper disc method. Variation concentration of areca catechu’s liquid smoke was use 10, 15, 20, 25, 35, 50, 75 and 100%(v/v) to inhibit Bacillus cereus and Pseudomonas aeruginosa. Result of this research showed maximum inhibition of areca catechu’s liquid smoke is at 100% concentration with inhibit diameter 18,3mm for Bacillus cereus and 16 mm for Pseudomonas aeruginosa. GC-MS identified important components in areca catechu’s liquid smoke as bacteria activities inhibitor are phenol derivate and acetic acid.

Optimasi Komposisi Fasa Gerak dan pH Buffer Asetat Pada Analisa Zat Warna Sintetik Rhodamin B dan Ponceau 4R Menggunakan Metoda HPLC Liza Olivia; Budhi Oktavia; Iryani Iryani
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

One of the food addictives that is often used by many people is dye. More synthetic dyes is used in food and beverage than natural dyes time by time. According to Regulation of Health Ministry No.239/Menkes/Per/VI/85, Rhodhamin B is synthetic dye which is banned because it is a carcinogen. However, Ponceau 4R is allowable synthetic dye. The way of using Ponceau 4R must be based on regulation of the Indonesia Health Ministry No. 722/Menkes/per/IX/88; 70 mg/kg for beverage and 300 mg/kg for food. The purpose of this research is to find the optimum condition of the mobile phase composition and pH buffer acetate. The analysis of the Rhodamin B and Ponceau 4R were done by optimalizing the mobile phase composition and pH acetate buffer with methanol mobile phase: acetate buffer and stationary phase ODS C18 column used the HPLC method of the UV-Vis detector. The result of the optimization pH acetate buffer was pH 6 acetate buffer with a ratio composition of methanol: buffer (80:20) with a wavelength of 540 nm. Retention times obtained for Rhodamine B was 5,048 minutes and Ponceau 4R was 2,528 minutes. There were four samples containing dye Ponceau 4R and none containing dye Rhodamine B were found by using the HPLC method from the ten samples tested

Analisis Kandungan Mangan (Mn) dan Tembaga (Cu) dalam Bijih Mangan di Daerah Taming Tonga Kecamatan Ranah Batahan Kabupaten Pasaman Barat Secara Spektrofotometri Serapan Atom Widya Pasema; Amrin .; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

A research on the analysis of Manganese and copper content in the manganese ore in the area Taming Tonga artifacts using atomic absorption spectrophotometry had been done. This study aims to determine the content of manganese (Mn) and copper (Cu) with variation of solvent, particle size variations, and solvent volume variations in atomic absorption spectrophotometry. This study uses a wet method of destruction, the destruction process is done with some variation of the solvent variation: concentrated HCl, concentrated HNO3 and HCl-HNO3 concentrated (3:1), variations in particle size is ≤ 63 μm,> 63 - ≤ 75 μm, and> 75 - ≤ 90 μm and variations in volume 20 mL, 25 mL, 30 mL, 35 mL, 40 mL. The results of this study showed the highest manganese content in the samples obtained by using Aquaregia 30 mL that is 57 % with particle size ≤ 63 μm while the highest levels of copper in samples obtained by using a solvent which is 1,89 % HCl 25 mL with particle size ≤ 63 μm best.

Isolasi dan Karakterisasi Flavonoid dari daun sambang darah (Excoecaria cochinchinensis L) Siska Oktariza; Yustini Ma’aruf; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Flavonoids are greatest a group of phenolic compounds found in nature. One of the plants that contain flavonoids and used as medicine are the leaves sambang darah (excoecaria cochichinensis L). This study aims to isolate and characterize flavonoids from leaves sambang darah (excoecaria cochichinensis L). The method used is maceration using solvents methanol and fractionation with n-hexane and ethyl acetate. Separation was performed by column chromatography with silica gel 60 adsorbent and eluent ethyl acetate: methanol in SGP (Step Gradient Polarity) and recrystallization purification done. From the results obtained by the isolation of flavonoids in the form of brownish yellow solid, it has not obtained pure of flavonoids.

Optimasi Proses Degradasi Metil Violet pada Reaktor Fotokatalitik Film TiO2-PEG Ika Sri Sulfiana; Hardeli Hamzah; Irma Mon
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Methyl violet is one of triphenylmethane dyes which has been used extensively in various industrial application. Significant proportion of these dye enters the environment as wastewater. Photocatalytic degradation by using TiO2 under UV light irradiation has been shown to be potentially advantageous in the treatment of wastewater. This research was aimed to determine the optimum thin layers of catalyst and irradiation period of photocatalytic reactor. Modification by adding PEG was done to enhance TiO2 activity. A decrease in methyl violet concentration was analysed by using UV-Vis Spectrophotometer. GC-MS was used to ensure that there were a degradation indeed. Experimental results showed the optimum thin layers was reached in 8 times and irradiation period was 5 hours. At this optimum condition, degradation percentage obtained was 79,03% with the initial concentration used was 10 mg/L and the flow rate was 110 mL/s. Identification by using GC-MS showed many peaks which proved there were degradation processes.

Analisis Kadar Asam Askorbat dan Asam Benzoat dalam Minuman Ringan dengan HPLC Menggunakan Fasa Gerak Metanol dan Buffer Asetat Rani Sanjaya; Budhi Oktavia; Bahrizal Bahrizal
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012)
Publisher : Departemen Kimia FMIPA UNP

Penelitian ini bertujuan untuk menentukan kondisi optimum untuk pemisahan dan penentuan kadar asam askorbat dan asam benzoat yang berperan sebagai pengawet dalam minuman ringan yang beredar di pasaran dan di lingkungan sekolah dengan menggunakan HPLC. Hasil penelitian menunjukkan bahwa kondisi optimum HPLC yang menggunakan fasa gerak metanol dan buffer asetat berada pada laju alir 1 ml/mnt, Kolom ODS C18, λ= 240 nm, pH buffer 3.5, dilakukan secara elusi gradien yang dimulai pada komposisi fasa gerak 5:95 hingga 50:50 selama 5 menit. Dari hasil uji kadar sampel minuman ringan yang dijual di lingkungan sekolah tidak ditemukan asam askorbat dan asam benzoat sebagai bahan pengawet, sedangkan untuk minuman ringan yang beredar di pasaran dari 5 sampel yang diuji ditemukan sampel yang mengandung asam benzoat yang melebihi batas maksimum yang diizinkan yang terdapat pada sampel C yaitu 676 ppm, sedangkan kadar yang diizinkan menurut SNI 01-0222-1995 untuk asam benzoat adalah 600 ppm, sedangkan untuk kandungan asam askorbat terbanyak terdapat pada sampel A yaitu 2869 ppm.

Efek Variasi Plat Elektroda Cu/Al Pada Generator Hidrogen Sri Wahyu Wardani; Rahadian Zainul
Jurnal Periodic Jurusan Kimia UNP Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Penelitian ini bertujuan untuk mengetahui efek varisi plat elektroda pada produksi gas hidrogen menggunakan metode elektrolisis. Pada elektrolisis ini digunakan arus dan tegangan tetap sebesar 0.6 Amper dan 2 volt selama 1 jam. Hasil yang didapatkan yaitu reaksi elektroisis terjadi pada plat 8 menggunakan elektrolit aquades, CH3COONa 0,01 M dan NH4Cl 0,01 M dengan hasil 6 mL, 144 mL, dan 112 mL. Kemampuan petransferan elektron pada setiap elektrolit berkurang pada lapisan plat yang lebih tebal karena tegangan yang digunakan sangat kecil.Keyword : Elektrolisis, Cu-Al, Elektrolit, Arus, Tegangan

Uji Antimikroba Asap Cair Hasil Pirolisis Sabut Pinang (Areca Catechu L) Terhadap Pertumbuhan Aspergillus flavus dan Rhizopus stoloniferus Dewi Ayu Novita; Iswendi Iswendi; Iryani Iryani
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012)
Publisher : Departemen Kimia FMIPA UNP

Aspergillus flavus and Rhizopus stoloniferus are microbes that can cause damage to the food. The existence of these microbes in food can cause illness in humans and animals. One of the efforts made to inhibit the growth of microbes in food is the use of preservatives. Preservatives are being developed right now is the use of organic preservatives that use liquid smoke. Liquid smoke is the smoke of the liquid condensate from the pyrolysis of materials containing cellulose, hemicellulose and lignin such as coco nut. From the pyrolysis of the resulting compounds such as phenol and derivatives, organic acids and carbonyl compounds, which can act as an antimicrobial. This study aims to determine the effect of different concentrations of liquid smoke areca husk pyrolysis results on the growth of microbes that cause food decay, Aspergillus flavus and Rhizopus stoloniferus. This research was conducted at the Laboratory of Chemistry State University of Padang with this type of research is experimental. Testing was conducted using paper disc method. Design research is done completely randomized design (RAL) with liquid smoke concentration variation factor. The results showed that the concentration difference factor gives a different effect on the ability of liquid smoke as a result of pyrolysis coco nut antifungal. Highest zone of inhibition at a concentration of 25% (v / v) for Aspergillus flavus is 12 mm, while for Rhizopus stoloniferus is equal to 10 mm.

Pemanfaatan Limbah Lumpur Industri Crumb Rubber Sebagai Adsorben Ion Cr(VI) yang Diaktivasi dengan H3PO4 Resti Hariyani; Salmariza Sy; Mawardi Mawardi
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Utilization of sludge waste from wastewater treatment system using active sludge systems of Crumb Rubber Industry PT.Teluk Luas Lubuk Begalung Padang to be activated carbon that was activated by H3PO4 as adsorbent of ions Cr (VI) has been done. Characterization of activated carbon was conducted according to SNI 06-3730-1995, including the determination of iodine absorption, moisture content, and the amount of carbon bound. Besides, this research was also conducted using batch system treatment to activated carbon and inactivated carbon, including pH, contact time, and initial concentration of solution. The equation of Langmuir Isotherm was used to determine maximum capacity of activated carbon adsorption to Cr (VI). Results showed that the absorption of iodine was 48,26%, moisture content was 0.14%, and carbon bound was 24,925%. The optimum pH, the contact time and optimum concentration respectively was pH3, 60 minutes and 50 mg/L for an activated carbon adsorbent and pH2, 120 minutes and 50 mg/L for inactivated carbon adsorbent. The activator influenced to the adsorption of Cr(VI). The determination of the optimum adsorption for activated carbon adsorbent was 1,11 and 1,99 mg/g, meanwhile for inactivated carbon, it was 0,08 and 1,16 mg/g.

Penyerapan Logam Krom dalam Limbah Cair Laboratorium Kimia Menggunakan Adsorben Tanah Napa Mawardi Anwar; Hary Sanjaya; Victoria Frisiananda
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 1 (2013)
Publisher : Departemen Kimia FMIPA UNP

It has been investigated the adsorbtion of chrom metal in chemistry laboratory liquid waste using tanah napa as an adsorbent. Waste containing chrom metal was pass through a coloum that filled with tanah napa adsorbent. It is studied the use of nitrit acid (HNO3) for regeneration purpose and recovery of chrom metal at various concentration. The result showed that HNO3 at concentration 0.4M was the best for regeneration of Chrom(III) is 78.03% and concentration 0.3M for regeneration of Chrom(VI) is 53.02%. The optimum condition of this method were applied to preconcentration of Chrom in chemistry laboratory liquid waste with HNO3 0.3M. The result show that Chrom found in chemistry laboratory liquid waste which is initially 0.9123 ppm can be preconcentration to 1.7760 ppm with 5x10mL preconcentration.

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Budhi Oktavia

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periodic@fmipa.unp.ac.id

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Departemen Kimia, FMIPA, UNP Jalan Prof. Dr. Hamka, Air Tawar, Padang, Sumatera Barat

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Sumatera barat

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Home Page

OAI Link

Editorial Team

Contact

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Contact Name Budhi Oktavia

Contact Email budhioktavia@fmipa.unp.ac.id

Phone -

Journal Mail Official periodic@fmipa.unp.ac.id

Editorial Address Departemen Kimia, FMIPA, UNP Jalan Prof. Dr. Hamka, Air Tawar, Padang, Sumatera Barat

Location Kota padang, Sumatera barat INDONESIA

Abstract

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Contact Name
Budhi Oktavia

Contact Email
budhioktavia@fmipa.unp.ac.id

Phone
-

Journal Mail Official
periodic@fmipa.unp.ac.id

Editorial Address
Departemen Kimia, FMIPA, UNP Jalan Prof. Dr. Hamka, Air Tawar, Padang, Sumatera Barat

Location
Kota padang,

Sumatera barat

INDONESIA