Jurnal Periodic Jurusan Kimia UNP
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.
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<![CDATA[Pengaruh Supporting Electrolyte Pada Penentuan Formaldehida Secara Voltametri Siklik Menggunakan Pencil Lead Electrode (PLE) Modifikasi Lapisan Tipis Perak ]]>
<![CDATA[Putri, Yunisa Anugrah]]>;
<![CDATA[Sari, Trisna Kumala]]>;
<![CDATA[Oktavia, Budhi]]>;
<![CDATA[Nizar, Umar Kalmar]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124516
<![CDATA[Formaldehyde was detected electrochemically using a pencil lead electrode modified with a thin layer of silver (Ag/PLE). Modification of the silver thin layer was carried out by sweeping-potential electrodeposition using the cyclic voltammetry method. This study aims to study the response of PLE and Ag/PLE for determination of formaldehyde and also to determine the optimum conditions of the supporting electrolyte used in the measurement of formaldehyde. The results showed that Ag/PLE provided better performance than PLE and 0.1 M KOH was the optimum supporting electrolyte. Measurement of formaldehyde using Ag/PLE electrodes with a concentration of 10 mM of test analyte. The oxidation peak of formaldehyde is present at a potential of 0.054 Volt.]]>
<![CDATA[Sintesis dan Karakterisasi Katalis Karbon Kulit Kolang-Kaling (Arenga Pinnata) Tersulfonasi untuk Produksi Biodiesel Dari Palm Fatty Acid Distillate ]]>
<![CDATA[Simbolon, Ranita]]>;
<![CDATA[Nizar, Umar Kalmar]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.118699
<![CDATA[Indonesia is developing alternative energy, namely biodiesel. In producing biodiesel, catalysts are needed. One of the catalysts is a solid acid catalyst that can be synthesized from organic waste containing cellulose, hemicellulose and starch. The organic waste used in this study was a peel of sugar palm fruit. The purpose of this study is to determine the physicochemical properties of carbon catalysts from peel of sugar palm fruit that have been synthesized by calcination and sulfonation methods using H2SO4 and study some of the properties of biodiesel resulting from the esterification reaction between PFAD and methanol using a peel of sugar palm fruit sulfonated carbon catalyst. The synthesis of this catalyst uses a calcination method with a temperature variation of 250oC – 400oC and a sulfonation method using H2SO4. The resulting catalyst is characterized by FTIR, XRD and acid site. Then, catalysts are applied in producing biodiesel. The resulting biodiesel is tested for its biodiesel properties. The results of the study obtained that the highest number of acid sites in the carbon from the peel of sugar palm fruit was a calcination temperature of 300oC (K3-300) of 0.03538 mmol.g-1. The results of the FTIR characterization analysis showed that the sulfonate group was successfully substitution into the carbon surface which can be observed in the area of 1300-1000 cm-1. This area features two twin peaks that are characteristic of symmetrical and asymmetric sulfonate groups. Meanwhile, the result of XRD characterization is that the cholang-kaling skin catalyst forms a catalyst with an amorphous structure. The highest test results of the kolang-kaling skin acid site were at the optimum temperature, namely K3-300 of 0.03538 mmol.g-1. The K3-300 catalyst managed to convert the FFA percent to FAME by 48.33%.]]>
<![CDATA[Optimasi Adsorpsi Ion Cd2+ Pada Silika Gel – GPTMS (glisidoksilpropoltrimetoksisilan) Termodifikasi Sulfonat ]]>
<![CDATA[Pebriani, Pebriani]]>;
<![CDATA[Oktavia, Budhi]]>;
<![CDATA[Nasra, Edi]]>;
<![CDATA[Riga, Riga]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124279
<![CDATA[Adsorbents that are often used in the adsorption process are silica gels. Silica gel has unique advantages such as being, having ion exchange ability, being stable at high temperatures, not floating on organic solvents, and being easy to modify. But the effectiveness of silica gel adsorption against metal ions is weak, so it needs to be modified on the surface of silica gel. The modifier used is a sulfonate group derived from a 4-amino-5-hydroxy-2,7-naphthalenedisulfonate salt using a glycosidoxypropyltrimethoxysilane linkage (GPTMS). The purpose of this study is to determine the optimum conditions for the Cd2+ ion with variations in pH and contact time. The results of the study obtained optimal conditions for the absorption of the Cd2+ ion at pH 5 and a contact time of 60 minutes.]]>
<![CDATA[Analisis Sifat Fisikokimia dari Beberapa Minyak Kemasan Hasil Penggorengan Tempe ]]>
<![CDATA[Farhan, Muhammad]]>;
<![CDATA[Azhar, Minda]]>;
<![CDATA[Etika, Sri Benti]]>;
<![CDATA[Pernadi, Niza Lian]]>;
<![CDATA[Sabrina, Joya]]>;
<![CDATA[Rahmi, Fathaniah Raviqa]]>;
<![CDATA[Nizar, Umar Kalmar]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124341
<![CDATA[Cooking oil is one of the staple ingredients for cooking which is very popular in Indonesian society. The cooking oil most often used for cooking by the community is palm oil, because it is easy to obtain and has a relatively affordable price. But on the other hand cooking oil which is repeatedly heated at high temperatures can have harmful effects on the body, especially with the presence of solutes in the ingredients that are fried. This study aims to determine the quality of palm oil from tempe frying which contains vegetable protein for 1 hour at 160 C. The cooking oil is heated for 1 hour then put in the tempe and removed after it is cooked, after 1 hour the oil is cooled and its quality is tested by testing the density, flow rate, acid number and saponification number. The results showed that after cooking for 1 hour testing the tempe frying oil, the quality of the oil based on the quality standard value was bimoli, followed by pure essence and fortune. The quality of bimoli oil from tempe frying for one hour was with a density of 0.9233 gr/mL, a flow rate of 3.805 mL/s, an acid number of 8.0536 mgKOH/g and a saponification number of 16.091 mgKOH/g.]]>
<![CDATA[Pemanfaatan Karbon dari Bunga Cemara Laut (Casuarina equisetifolia) untuk Penjernihan Minyak Jelantah ]]>
<![CDATA[Rahmi, Maulidia Arsyta]]>;
<![CDATA[Putra, Ananda]]>;
<![CDATA[Sari, Trisna Kumala]]>;
<![CDATA[Pernadi, Niza Lian]]>;
<![CDATA[Istiqamah, Siti Sarah]]>;
<![CDATA[Nizar, Umar Kalmar]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124261
<![CDATA[Used cooking oil is waste oil that has been used many times and is also known as used cooking oil which contains food residue and is a pollutant to the environment. This oil contains free fatty acids, carbonyl compounds, and peroxides. The content contained in used cooking oil can cause poisoning in humans and cause pollution to the environment. This study aims to clarify used cooking oil so that it can be reused. Carbon from sea pine flowers is used as a solution to clarify used cooking oil in this study. BCL carbon was obtained using the calcination method at various temperatures of 250oC, 300oC, 350oC, and 400oC. The resulting carbon is then subjected to a proximate test. Based on the results of the proximate test, the results obtained were in accordance with the SNI 06-3730-1995 standard with the optimum value obtained at 350oC calcination temperature. The clarification of used cooking oil is carried out by mixing used cooking oil and carbon as a result of calcination at 350ºC. Variations in the mass of carbon used are 1,3 and 5 grams. The results showed that the carbon of sea cypress flowers can be used as an absorbent for cleaning used cooking oil which can adsorb its fatty acid content. The optimum absorbent of this study was the 5g CBCL sample. This is evidenced by the results of the analysis that has been carried out with the lowest density value of 0.83 g/mL, the highest flow rate value of 4.312 mL/s and the lowest acid number value of 0.5 mg KOH/g.]]>
<![CDATA[Pengaruh pH dan Waktu Kontak Terhadap Adsorpsi Ion Pb2+ pada Silika Gel-GPTMS Termodifikasi Sulfonat ]]>
<![CDATA[Afrilia, Yoni]]>;
<![CDATA[Oktavia, Budhi]]>;
<![CDATA[Kurniawati, Desy]]>;
<![CDATA[Nizar, Umar Kalmar]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124343
<![CDATA[Adsorption is the process of accumulation of atoms or ions in solution on the surface of a solid adsorbent. Silica gel can be used as an adsorbent because it has two groups of active sites, namely silanol (Si-OH) and siloxane (Si-O-Si). The active groups also allow silica to be modified. This modification was made to increase the ability of silica to adsorb ions, one of which is Pb2+ ion. The modifier compound used is a sulfonic salt (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid) with a glysidoxypropyltrimethoxysilane (GPTMS) linking compound. The modified adsorbents were characterized by FTIR and the absorption results were characterized by AAS. The modified adsorbent was to determine the optimum conditions for adsorption of Pb2+ ions using silica sulfonate. Adsorption was carried out using the batch method. The optimum absorption conditions for Pb2+ metal ions using silica sulfonate were obtained at pH 3, contact time of 45 minutes.]]>
<![CDATA[Efektivitas Antibakteri Ekstrak Jamur Endofit BS pada Media Tumbuh Beras Merah ]]>
<![CDATA[Pramesti, Radia Sagita]]>;
<![CDATA[Iryani, Iryani]]>;
<![CDATA[Ulfah, Mariam]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.119654
<![CDATA[BS endophytic fungus is a fungus isolated from the flower of the bitter plant (A. paniculata) which is known to produce various secondary metabolites which are reported to have antibacterial bioactivity. The purpose of this study was to determine the antibacterial activity of the extract of the endophytic fungus BS isolated from the bitter flower (A. paniculata) on brown rice growing media against Streptococcus mutans, Staphylococcus aureus, and Pseudomonas aeruginosa bacteria. BS endophytic fungi were grown on brown rice media and then extracted by maceration method with ethyl acetate as solvent. The antibacterial activity test of the extract was carried out by disc diffusion method. The results showed that BS endophytic mushroom extract grown on brown rice media could inhibit the growth of Streptococcus mutans, Staphylococcus aureus, and Pseudomonas aeruginosa bacteria at concentrations of 10%, 30%, and 50%. In conclusion, BS endophytic fungus isolated from A. paniculata flower can inhibit the growth of bacteria with the smallest diameter inhibitors successively on Staphylococcus aureus, Streptococcus mutans, Pseudomonas aeruginosa bacteria]]>
<![CDATA[Pemanfaatan Karbon dari Kulit Buah Kelor (Moringa oleifera) untuk Penjernihan Minyak Jelantah ]]>
<![CDATA[Novela, Riana]]>;
<![CDATA[Zainul, Rahadian]]>;
<![CDATA[Kurniawati, Desy]]>;
<![CDATA[Pernadi, Niza Lian]]>;
<![CDATA[Rahmi, Maulidia Arsyta]]>;
<![CDATA[Istiqamah, Siti Sarah]]>;
<![CDATA[Nizar, Umar Kalmar]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124150
<![CDATA[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.]]>
<![CDATA[Pencil Lead Electrode Modifikasi Lapisan Tipis Emas Untuk Deteksi Formaldehida Secara Voltametri Siklik ]]>
<![CDATA[Malinda, Tasya]]>;
<![CDATA[Sari, Trisna Kumala]]>;
<![CDATA[Nasra, Edi]]>;
<![CDATA[Azra, Fajriah]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124470
<![CDATA[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.]]>
<![CDATA[Pengaruh Massa dan Waktu Kontak Terhadap Penyerapan Ion Logam Pb2+ Menggunakan Xerogel dari Abu Kulit Durian (Durio zibethinus Murr.) ]]>
<![CDATA[Putri, Sinta Eka]]>;
<![CDATA[Nasra, Edi]]>;
<![CDATA[Sanjaya, Hary]]>;
<![CDATA[Riga, Riga]]>
<![CDATA[ Periodic Vol 13, No 1 (2024): PERIODIC ]]>
Publisher : <![CDATA[Departemen Kimia FMIPA UNP ]]>
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DOI: 10.24036/periodic.v13i1.124373
<![CDATA[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.]]>
