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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 20 Documents
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Search results for , issue "Vol 13, No 2 (2024): PERIODIC" : 20 Documents clear
Pemanfaatan Karbon dari Sabut Buah Nipah (Nypa fruticans) untuk Penjernihan Minyak Jelantah Istiqamah, Siti Sarah; Mawardi, Mawardi; Khair, Miftahul; Rahmi, Maulidia Arsyta; Novela, Riana; Pernadi, Niza Lian; Nizar, Umar Kalmar
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.125419

Abstract

Along with the increase in the food and household industries, demand for raw materials for cooking oil continues to increase, causing shortages and increasing prices of cooking oil. This causes cooking oil to be used repeatedly. Cooking oil that has been used repeatedly is called used cooking oil which contains many carcinogenic compounds that can be harmful to health. Therefore, this research aims to purify used cooking oil using palm fiber carbon to improve the quality of used cooking oil. Nipa palm fiber contains hemicellulose and cellulose so it has the potential to be used as a carbon source using the calcination method and carrying out proximate tests such as ash content, vapor content and bound carbon content. Next, it is applied in the process of purifying used cooking oil using the adsorption method. After that, several properties of used cooking oil were tested, such as density, flow rate, acid number and saponification number. The results obtained in this research for the proximate test of palm fruit fiber at a temperature of 250-400℃ have met the SNI 06-3730-2021 standard. Nypa palm fiber carbon in used cooking oil was proven to reduce the density value to 0.81 g/mL, flow rate 4.17 mL/s, acid number 3.6 mg/KOH and saponification value 427 mg/KOH.
Kondisi Optimum Adsorpsi Ion Logam Ni2+ Oleh Silika gel-GPTMS Termodifikasi Sulfonat Ramadhani, Dwi; Oktavia, Budhi; Kurniawati, Desy; Etika, Sri Benti
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.124480

Abstract

Silica gel is a compound that has two active sides, namely silanol (Si-OH) and siloxane (Si-O-Si) which have not been effective as adsorbents so modifications are made. Silica gel is modified using monosodium salt 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid which is reacted first with GPTMS (glycidoxypropyltrimethoxysilane) as a connecting bridge to produce sulfonate-modified silica gel-GPTMS adsorbent. The purpose of this modification is that sulfonate-modified silica gel-GPTMS are made to adsorb Ni2+ metal ions under optimum conditions at pH, contact time and concentration. The adsorption process is carried out using the batch method by seeing how much adsorbent adsorption capacity is made against the absorption of metal ions. The characterization used is an FTIR (Fourier Transform-Infrared) spectrophotometer in the analysis of the adsorbent manufacturing process and SSA (Atomic Absorption Spectrophotometry) to see the results of metal ion absorption. The results obtained according to research that has been conducted show the adsorption of sulfonate-modified silica gel-GPTMS against the absorption of Ni2+ metal ions at optimum conditions is at pH 3 and contact time for 45 with absorption capacities of 1.5265 mg/g and 1.5826 mg/g respectively.
Pengaruh Ukuran Partikel Serta Laju Alir Pada Penyerapan Ion Logam Cr6+ Menggunakan Kulit Langsat (Lansium domesticum) Andini, Namira Tri; Kurniawati, Desy; Zainul, Rahadian; Nasra, Edi
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Chromium metal is a toxic and carcinogenic metal that needs to be addressed. Biosorption  can be used as one method to reduce lead metal level in waters. Biosorpsian is easy and simpler to use, more-ecomomial, and  environmentally friendly because it utilizes microorganisms and biomaterials. The purpose of this study was to determine the effect of particle size and flow rate on the absorption of Cr6+ metal ions using langsat peel as a biosorbent. In this study, Cr6+metal ions biosorption  was carried out using langsat peel with column method at a particle size variation of 106, 150, 250 and 425µm  and a flow rate variation of 1-4 ml/min. the results of this study were obtained optimum conditions at particle size 106 µm and flow rate 2 mL/min with optimum adsorbtion capacity of 5,02363 and 6,96203 mg/g.
Efek Aditif Ekstrak Betasianin dari Kulit Buah Naga (Hylocereus polyrhizus) Terhadap Kadar Asam Laktat Sinbiotik Set Yoghurt Munita, Azizah; Putri, Selvi Apriliana; Azhar, Minda
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.123718

Abstract

The use of synthetic food coloring raised the risk of chronic diseases, which was a serious problem in the food industry. To overcome this, a study was carried out on functional foods, especially synbiotic yogurt set, to evaluate betacyanin as a natural dye that had antioxidant properties. The goal was to provide an alternative solution to counteract free radicals, which are known to contribute to chronic diseases. This study examined the effect of betacyanin extract on lactic acid levels using homolactic fermentation. The experiment method involved a triplicate pattern, and different variations of betacyanin extract (5 mL, 10 mL, and 15 mL) were tested, alongside a negative control consisting of the synbiotic yogurt set without the addition of betacyanin extract. Statistical analysis, including One Way ANOVA and Tukey's test with GraphPad Prism 10.0, demonstrated that betacyanin had a significant impact on lactic acid levels. The synbiotic yogurt set with 15 mL of betacyanin extract exhibited the highest lactic acid content (1.88%), while the negative control displayed the lowest lactic acid content (0.98%). These findings indicate that betacyanin, as a natural dye, that had antioxidant properties and was capable of increasing the lactic acid content in the synbiotic yogurt set.Keywords — Betacyanine, red dragon peel, synbiotic set yogurt, lactic acid.
Analisa Beberapa Sifat Fisikokimia dari Minyak Goreng Kemasan Hasil Penggorengan dengan Lemak Sapi Rahmi, Fathaniah Raviqa; Hardeli, Hardeli; Nasra, Edi; Pernadi, Niza Lian; Sabrina, Joya; Farhan, Muhammad; Nizar, Umar Kalmar
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.125466

Abstract

Palm oil is one of the vegetable oils with the highest concentration of contaminants compared to other oils. The main components of palm oil are triglycerides which account for more than 95% and other components such as monoglycerides, diglycerides, free fatty acids, phosphatides and sterols. Beef in 100 grams contains fewer calories (498 kj), total fat (2.8 g), unsaturated fat (0.448 g), saturated fat (1.149 g) and cholesterol (50 mg) than goat meat of the same size .The nutritional composition of beef includes 18.8 grams of protein, 66.0 grams of water and 14.0 grams of fat. The aim of this research is to determine the physicochemical properties of packaged cooking oil produced from frying beef fat at certain temperatures and times. The physicochemical properties of the oil determined include density, flow rate, acidity index and saponification index. Bimoli cooking oil resulting from the frying process has a density value of 0.9205 gr/ml, a flow rate of 2.949 ml/s, an acid number of 3.06939 mgKOH/gr and a saponification index of 16.71005 mgKOH/gr. The results of this research indicate that the results of testing the physicochemical properties of packaged cooking oil have better values compared to the results of testing beef tallow cooking oil.
Pengaruh Suhu Kalsinasi Sekam Padi Terhadap Produksi Silika (SiO2) Althof, Hasna Sausan; Beri, Deski
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.124627

Abstract

Rice husk is a leftover material from the rice milling process and is known to have a high silica (SiO2) content. In this study, rice husk was calcined with temperature variations of 800℃, 850℃, and 900℃ to see the effect on the ash content produced. The ash obtained becomes whiter as the calcination temperature increases. The darker ash color indicates that there is still carbon content. In this study, silica was extracted using NaOH 10% and precipitated with HCl 10%. The synthesized silica was characterized using XRF. The results of the analysis using XRF revealed that the optimum calcination temperature was obtained at 900℃ which produced the highest silica yield of 96.32% with silica purity (SiO2) reaching 70.307%.
Efek Fraksi Polar Daun Pegagan (Centella Asiatica (L.) Urb) Terhadap Kadar Kolesterol Total Tikus Sindrom Metabolik Muslim, Muhammad; Budi, Indah Permata
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.125362

Abstract

Metabolic syndrome is a collection of factors including central obsession, dyslipidemia, hypertension, and elevated blood glucose. Centella asiatica leaves (Centella asiatica L.) Urb) which is widely used as a natural medicine, contains antioxidants with the main component containing several secondary metabolites, namely flavonoids, saponins, tannins and terpenoids that can reduce total cholesterol levels. This study aims to determine the effect of the duration of administration of the polar fraction of Centella asiatica leaves (Centella asiatica (L.) Urb) on the reduction of total cholesterol levels in metabolic syndrome rats. The research subjects were 24 male rats which were randomly divided into 6 groups, namely the negative control group which received standard feed and aquadest, while the other 5 groups were induced using high-fat diet for 28 days. Each group was given the preparation, negative group (aquadest), positive control (Na-CMC suspension 0.5%), comparison (simvastatin), treatment group (polar fraction of gotu kola leaf at a dose of 125 mg/kgBW/day, 250 mg/kg BW/day, and 500 mg/kgBW/day) given for 14 days. The measurement of total cholesterol levels was carried out using the CHOD-PAP method. Data were tested using two-way ANOVA. Total cholesterol decreased in all treatment groups after administration of the polar fraction of centella asiatica leaves significantly (p<0.05). The highest decrease was 49.50% in the 500mg/KgBW dose group, followed by the comparison group at 45.58%, followed by the 250mg/KgBW dose at 44.68% and the 125mg/KgBW dose at 41.21%. Based on the results of the study showed that the polar fraction of gotu kola leaves at the time of administration can reduce total cholesterol levels. The effective dose to reduce total cholesterol levels in metabolic syndrome rats was a dose of 500 mg/kgBW
Pengaruh pH Pada Penentuan Ion Logam Fe3+ Secara Anodic Stripping Voltammetry Menggunakan Pencil Lead Electrode Modifikasi Lapisan Tipis Emas Akhmad, Ashta Varan; Sari, Trisna Kumala; Ulianas, Alizar; Suryani, Okta
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.124502

Abstract

Fe3+ metal ions have been electrochemically detected using a pencil lead electrode modified with gold thin layer. The modification of the gold thin layer is carried out by sweeping-potential electrodeposition using the cyclic voltammetry method. The purpose of this study was to determine the optimum pH conditions for measuring Fe3+ metal ions using HNO3 as a supporting electrolyte. The pH optimization is carried out using the Anodic Stripping Voltammetry (ASV) method. This technique involves a pre-concentration step where Fe3+ is reduced to Fe0 on the electrode surface in HNO3, followed by a stripping step in ASV where Fe0 is oxidized back to Fe3+. The results showed that HNO3 with pH 1 is the optimum pH for measuring Fe3+ metal ions using Au/PLE electrodes with a test analyte concentration of 250 μM. The anodic peak of the Fe3+ metal ion appears at a potential of 0.55 V.
Penjernihan Minyak Jelantah dengan Menggunakan Terong (Solanum melongena) Rizki, Suci Yulia; Hardeli, Hardeli; Ningsih, Sherly Kasuma Warda; Pernadi, Niza Lian; Sidiq, Aqil Marsya; Nizar, Umar Kalmar
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.124544

Abstract

Used cooking oil is used oil that has been heated repeatedly with high heat. At high heating, the triglycerides contained in used cooking oil can be hydrolyzed into free fatty acids. In addition, it can form free radical compounds that can cause serious diseases such as cancer. Therefore, this study aims to clarify used cooking oil using eggplant (Solanum melongena). Eggplant is rich in beneficial ingredients such as high levels of flavonoids, phenolics and antioxidants. Eggplant can be used as an adsorbent that can clarify used cooking oil. This study used the method of heating used cooking oil at a temperature of 160⁰C and the mass variations of the eggplant were 5, 10 and 15 grams. The result of this study is that the use of 10 grams of eggplant is proven to clear used cooking oil. which was previously blackish brown underwent degradation of light brown color accompanied by a decrease in the density value to 0.94 g/mL, the acid number to 2.08 mg/KOH, and an increase in the flow rate value to 0.2987 ml/s, a saponification number of 80.17 mg KOH in used cooking oil.
Optimasi Metode Ekstraksi Mikroplastik Polivinil Klorida (PVC) Dengan Wet Peroxide Oxidation (WPO) Deliani, Nur Farida; Dewata, Indang
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.125423

Abstract

The increase in plastic production causes an increase in plastic waste in the environment both on land and in waters. Over time, plastic waste will degrade into microplastics in waters. Microplastics in waters are contaminated with organic impurities which can interfere with the identification of microplastics. The method for extracting plastic particles from organic impurities is using wet peroxide oxidation. However, these methods have not been systematically tested and standardized. This research aims to determine the optimum conditions for the extraction method with the addition of wet peroxide oxidation for the identification of PVC microplastics. In this research, a 30% hydrogen peroxide solution was used as an oxidizer and a Fe2+ catalyst as the main ingredient to produce OH radicals which function to oxidize organic impurities and the samples used were PVC microplastics made from grinding PVC plumbing pipes. Determination of optimum conditions was carried out at varying oven temperatures of 70oC, 80 oC, 90 oC, 100oC, dan 110oC, varying concentrations of 0,025 M; 0,05M; 0,075M; 0,1M dan 0,125M and temperature variations at heating 30oC, 45oC, 60oC, 75oC, dan 90oC, as well as testing the optimum extraction method on water samples with water volumes ranging (200, 400, 600, 800, and 1000) mL. The research results showed that the optimum conditions were an oven temperature of 90oC, a Fe catalyst concentration of 0.075M, and a heating temperature of 75oC in the PVC microplastic extraction process resulting in a PVC microplastic mass of 0.3403 grams. Characterization of PVC microplastics was carried out using Primostar 1, FTIR and XRF microscope instruments. Tests using a microscope showed that the form of PVC microplastic was identified, namely fragment form. In the FTIR test, CH2, C-Cl, C-C  peaks were obtained which indicated that the polymer was a type of PVC, apart from that there were N-H bend dan N-H stretching  peaks which indicated the material. The organic impurities are in the form of amine, and in XRF testing the additive elements that make up PVC microplastics are obtained, namely Si, P, Ca, V, Cu, Br, Sr.

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