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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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Pengukuran Anion Anorganik Secara Simultan dalam Sampel Air Tanah dan Air Ledeng Menggunakan Kromatografi Ion Amin, Muhammad; Oktavia, Budhi
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.126222

Abstract

Ion chromatography is an advanced and highly sensitive form of ion exchange chromatography that can effectively detect ion species, whether organic or inorganic ions. This research study utilized ion chromatography with a suppressed conductivity detection system to separate and measure the concentration of fluoride, chloride, nitrite, bromide, nitrate, phosphate, and sulfate ions in groundwater and tap water samples. The eluent solution used in this separation contained 6.0 mmol/L Na2CO3 and 0.25 mmol/L NaHCO3, which was crucial in ensuring the accuracy and selectivity of the detections. The samples were collected in 3 sub-districts in Ternate City, and the study's findings shed light on the water quality in the area.
Pemanfaatan Karbon dari Kulit Buah Kelor (Moringa oleifera) untuk Penjernihan Minyak Jelantah Novela, Riana; Zainul, Rahadian; Kurniawati, Desy; Pernadi, Niza Lian; Rahmi, Maulidia Arsyta; Istiqamah, Siti Sarah; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124150

Abstract

The high demand for cooking oil causes scarcity and increases the price of cooking oil in the market. Despite the scarcity, people still use it by heating it repeatedly. Cooking oil that has been used repeatedly is called used cooking oil which contains saturated fatty acids which will have a negative impact on health if reused. Therefore, this study aims to clarify used cooking oil by using carbon from moringa peels to improve the quality of used cooking oil. Moringa fruit peel contains cellulose and hemicellulose so that it can be used as a carbon source using the calcination method and tested for approximation such as tests for ash content, vapor content and bound carbon. Furthermore, carbon is applied in the clarification of used cooking oil by adsorption method. After the used cooking oil has been clarified, the properties of the used cooking oil are tested, such as density, flow rate, acid number and saponification number. The result of this research is that the resulting Moringa peel carbon at 250 - 350oC complies with the SNI 06-3730-2021 standard. The application of Moringa peel carbon in used cooking oil has been shown to reduce the density value to 0.886 g/mL, an acid number of 4.476 mg/KOH, and succeeded in increasing the value of the flow rate to 0.735 and the saponification number to 351.751 mg/KOH.
Pencil Lead Electrode Modifikasi Lapisan Tipis Emas Untuk Deteksi Formaldehida Secara Voltametri Siklik Malinda, Tasya; Sari, Trisna Kumala; Nasra, Edi; Azra, Fajriah
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124470

Abstract

Formaldehyde is a toxic, carcinogenic, mutagenic and genotoxic compound that can harm the human body. Formaldehyde can threaten human health such as, can cause eye, nose and throat irritation and contact dermatitis on the skin. This research aims to study the response of pencil lead electrode (PLE) and pencil lead electrode (PLE) modification with gold thin layer in the development of formaldehyde sensor by using cyclic voltammetry. The electrode modification was done by potential-sweeping electrodeposition of Au on electrode and known as Au/PLE electrode. The resulting electrode has high conductivity and excellent catalytic activity because it is able to provide a large current response. In this study, the optimum conditions will be determined based on variations supporting electrolyte and cycle gold thin layer electrodeposition. Variations in supporting electrolyte and cycle for gold thin layer electrodeposition on the formaldehyde sensor give different peak current and potential results. KOH 0,1 M  is supporting electrolyte optimum and cycle for gold thin layer electrodeposition optimum is one cycle.
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 Terhadap Rendemen Silika Gel dari Kulit Tebu Tibarau (Saccharum spontaneum Linn) Menggunakan Metode Sol-Gel Ramadhani, Rini; Aini, Syamsi
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118870

Abstract

Several natural materials containing silica have been widely used to synthesize silica nanoparticles such as bagasse, rice husks, which can be in the form of dry and non consumable strands that function as inner protectors in the form of endospermium and embryos. Tibarau sugarcane is one of the renewable organic materials. The synthesis of silica nanoparticles from sudden sugarcane skin tibarau using the sol-gel method has been carried out, therefore we need to synthesize them from renewable materials as well. One of the renewable materials is organic. Different base materials require different reactions. One of the different synthesis is husk ash wherein, husk ash has amorphous phase characteristics ranging from 20-25o. The results of the synthesis of silica nanoparticles the effect of pH on the yield of silica gel, obtained the optimum pH at pH 8 and the results of the synthesis were characterized by FTIR to determine the functional groups containing silanol and siloxane functional groups and XRD to determine the crystallinity and the formed phase at 2θ = 31,7. Silica nanoparticles from sugarcane husk suddenly have a crystalline phase as well as an amorphous phase.
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.
Identifikasi Senyawa Metabolit Sekunder pada Daun Salam (Syzygium polyanthum) Erwan, Meriska Octavia; Parbuntari, Hesty
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118432

Abstract

Syzygium polyanthum or bay leaf is a plant that belongs to the Myrataceae family. Almost all parts of this plant can be used, such as roots, bark, leaves, flowers, fruit, and young shoots. But the part that is most often consumed is the leaves, which are widely used traditionally as a remedy for stomach aches, overcoming gout, high cholesterol, stroke, stomach ulcers, and improving blood circulation. In this study, identification of secondary metabolites contained in Syzygium polyanthum was carried out. The results of the identification indicate that Syzygium polyanthum contains secondary metabolites such as flavonoids, alkaloids, terpenoids, and saponins.
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.
Pengaruh Kulit Langsat (Lansium Domesticum) Yang Diimobilisasi Dengan Natrium Silikat Terhadap Penyerapan Ion Logam Zn2+ Dalam Larutan Addawiyah, Nadiyatul; Kurniawati, Desy
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118479

Abstract

Zinc is the fourth most used metal after iron, aluminum and copper and and it pollutes terrestrial and aquatic ecosystems. The primary issue with zinc is that it is non-biodegradable and will build up in water. To overcome this Zn metal, biosorption employs a batch method by using langsat peel immobilized with sodium silicate as a biosorbent, which is more efficient, environmentally friendly, and improves the adsorbent performance in the adsorption process. In this study, the parameters tested were variations in pH, solution concentration, particle size, contact time, and variations in stirring speed. The results showed that the maximum absorption capacity of the metal ion Zn2+ using sodium silicate immobilized langsat peel obtained through the Langmuir isotherm equation was 20.4081 mg/g in optimum state of the adsorption process at pH 4, solution concentration 300 ppm, particle size 150 m, time contact for 90 minutes and the stirring speed of 200 rpm.
Pengaruh Massa dan Waktu Kontak Terhadap Penyerapan Ion Logam Pb2+ Menggunakan Xerogel dari Abu Kulit Durian (Durio zibethinus Murr.) Putri, Sinta Eka; Nasra, Edi; Sanjaya, Hary; Riga, Riga
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124373

Abstract

Lead metal is one of the hazardous metals produced from industrial activities in Indonesia and can pollute the environment. The maximum level of Pb2+ ions in waters is 0.03 mg/L. If the Pb2+ ion level exceeds the predetermined level, it will have a harmful effect on the environment and living things. Adsorption is a method that can be used to reduce lead metal levels in water. The adsorbent that can be used is xerogel, which produced from durian peel (Durio zibethinus Murr.). The purpose of this study is to determine the optimum conditions of absorption and determine the absorption capacity of xerogel from durian peel against Pb metal. In this study, the batch method was used for the adsorption process by varying contact time and adsorbent contact mass. The results of this study obtained the absorption capacity under the optimum conditions of contact time of 60 minutes, and an adsorbent mass of 0.2 grams of 6.04 mg/g.

Page 28 of 35 | Total Record : 343

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