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All Journal Jurnal Periodic Jurusan Kimia UNP Edumatsains Jurnal Zarah Eksakta : Berkala Ilmiah Bidang MIPA Pelita Eksakta Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal Insan Farmasi Indonesia Journal of Natural Sciences MASALIQ: Jurnal Pendidikan dan Sains International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Pengabdian Pada Masyarakat

Sri Benti Etika

Universitas Negeri Padang

Author-ID : 2756491

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Veterinary Other

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Optimasi Penyerapan Zat Warna Malachite Green Menggunakan Karbon Aktif dari Kulit Pisang Kepok (Musa balbisiana Colla) Sintha Hafizhah Yonel; Edi Nasra; Budhi Oktavia; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Malachite green is a synthetic dye that is widely used in the textile industry. Textile industry waste that is not treated properly will pollute the aquatic environment. The threshold value for the permissible concentration of Malachite green in waters is around 0.01 mg/L. The adsorption method is an alternative method used to remove dyestuff waste. This study used a batch method which aims to determine the optimum conditions for absorption and the maximum absorption capacity of Malachite green using activated carbon from the peel of Kepok banana (Musa balbisiana Colla). In this study, treatments were carried out using variations in solution concentration and contact time. The results of this study, obtained the absorption capacity at optimum conditions concentration 150 mg/L and contact time 150 minutes with absorption capacity of 9.2429 mg /g with absorption percentage of 97.9734%. Mechanism the absorption of Malachite green follows the equation Langmuir isotherm with a determinant coefficient (R2) of 0,9989.

Optimasi pH dan Ukuran Partikel Karbon Aktif dari Kulit Pisang Kepok (Musa balbisiana Colla) Terhadap Penyerapan Zat Warna Methylene Blue Ridho Hermawan; Edi Nasra; Ananda Putra; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Methylene blue is one of the textile industry wastes which can cause pollution to aquatic ecosystems. The threshold value for the permissible concentration of methylene blue in ambient waters (5-10) mg / L. So we need a method to treat wastewater contaminated with dye so that it is safe to dispose of and does not pollute the environment. One of the effective methods for removing dye waste is the adsorption method. The purpose of this study was to determine the optimum absorption conditions and maximum absorption capacity of methylene blue using activated carbon from the peel of a banana (Musa balbisiana Colla). In this study, using the Bacht method to adsorb methylene blue dye by varying the pH and stirring speed. The results of this study showed that the absorption capacity at the optimum conditions of pH 6 and a particle size of 250 µm was 5.4096 mg / g and the absorption percentage was 86.54%.

Isolasi dan Karakterisasi Flavonoid dari Daun Kapuk (Ceiba pentandra L.) Putri Diana; Nazulis Z; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Have been done the isolation of flavonoids from the leaves of the kapok (Ceiba pentandra L.) in Chemical Research Laboratory, Faculty of mathematics ande Natural Sciences of the State University of Padang. This research aims to isolate and to know the characteristics of the flavonoid compounds from the leaves of kapok. Method of insulationus is maceration with methanol, followed by oil with n-hexane and ethyl acetate. Separation of the ethyl acetate fraction by coloumn chromatography using silica, eluen used ethylacetate : methanol in SGP. Test the purity of the insulation is done with KLT and melting point. Flavonoids obtained pure white-brownish powder with melting point range 263,3-263,8 0C. Test result with 10% NaOH color reagents, concentrated H2SO4 andMg-HCl showed the presence offlavonoids. Results test KKt2A bares stain is at regional aglikon flavon. The data analysis spectra IR showed the groups –OH ether, C=C aromatis and carbonyl C=O. While of spectra uv-vis the presence of a cluster of -OH on C-3. From the data up allegedly flavonoid the result of isolation is a flavone with a cluster of –OH on C-3 namely 3-hidroksiflavon.

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.

Sintesis dan Karakterisasi Senyawa C-Vanillin Kaliks[4]Resorsinarena (CVKR) Sebagai Adsorben Zat Warna Metanil Yellow Andriati Fitria Wati; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Pollution caused by industrial waste is a problem for people's lives, one of which is water pollution by dyes. The nature of this synthetic dye is difficult to degrade, so it requires an alternative method to be able to degrade the dye. The compound C-Vaniline Kalix[4]Resorcinarene (CVKR) has great potential to be developed as an adsorbent for dye absorption. This study aims to determine the potential of C-Vanillin Kaliks [4] resorcinnarene (CVKR) as an adsorbent for the absorption of methanyl yellow dye using optimum condition parameters which are estimated to affect the methanyl yellow absorption process. The CVKR obtained was in the form of a peach colored powder solid of 0.833 grams. The results of characterization with FTIR showed absorption peaks at wave numbers 3355.12 cm-1 (OH), 1508.14 cm-1 (C=C benzene) and 1141.58 cm-1 (CO), the results of UV-Vis measurements showed the presence of absorption of conjugated dienes at a wavelength of 299 nm with an absorbance of 3.5582 A and CVKR has a melting point of 3800 C. Analysis of the absorption of methanol yellow by CVKR under optimal conditions occurred at pH 5, concentration 250 mg/L, optimum contact time 90 minutes and stirring speed 200 rpm . Adsorption tends to follow the Langmuir isotherm pattern with a determinant value of 0.9175. The precision test value (% RSD) of methanyl yellow was 1.3361%. The LOD and LOQ values in the analytical method used were 0.27568233 mg/L and 0.91894118 mg/L.

Optimasi Penyerapan Malachite Green Menggunakan C-Sinamalkaliks[4]Resorsinarena Hasil Sintesis Sebagai Adsorben Dewi Fortuna Khairil; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Malachite green is a synthetic dye that is widely used in the textile industry. Textile industry waste that is not treated properly can cause pollution of the aquatic environment. The threshold value for the permissible concentration of malachite green in the water is 0,01 ppm. The adsorption method is one of the alternative method used to remove dye waste. This study used the batch method which aims to determine the optimum absorption conditions and maximum absorption capacity of malachite green using CSKR. In this study, treatment was carried out using variations in pH and concentration. The results of this study obtained that the optimum absorption capacity occurred at pH 3 and a concentration of 200 mg/L. This CSKR can be used in the absorption of malachite green dye.

Isolasi dan Karakterisasi Flavonoid dari Daun Belimbing (Averrhoa carambola Linn.L) Rido Ardianto; Yustini Ma’aruf; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Research of isolation and characterization of flavonoids from the leaves of star fruit (Averrhoa carambola Linn.L) has been done. A 393 g of condensed methanol extracts obtained from 5 kg of fresh leaves starfruit. The methanol extract of hot water added, further fractionated successively with n-hexane and ethyl acetate, resulting in a 4000 ml n-hexane fraction and 5000 ml of ethyl asetat. The flavonoid phytochemical test from the fractionation showed negative fraction of n-hexane, ethyl acetate fraction and water fraction flavonoid positive. Results separation by column chromatography ethyl acetate fraction concentrated extract produced 6 fractions, namely fraction A, B, C, D, E and F. Characterization using UV light gives a brown before chromatograms steamed green ammonia and gives a dark brown color after steamed with ammonia. Based on the existing literature is suspected in fraction B contained flavones glycosides, biflavonil or unusual tersulih flavons.

Pengujian Senyawa C-Sinamalkaliks[4]Resorsinarena Hasil Sintesis Dari Limbah Minyak Kayu Manis (Cinnamomum Burmanii) Sebagai Antioksidan Susiyati Safitri; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

C-Sinamalkaliks[4]resorcinarene is the result of the reaction of cinnamaldehyde and resorcinol compounds derived from cinnamon oil waste which has four alkenyl groups (double bonds), eight hydroxyl groups, and twelve benzene residues so that it can be used as an antioxidant because it has an OH group. The purpose of this study was to determine the IC50 value and antioxidant activity of C-Sinamalkalix[4]resorcinarene using the DPPH method (2,2-Diphenyl-1-picrylhydrazyl) and the ABTS method (2,2'-azino-bis(3-ethylbenz). -thiazoline-6-sulfonic acid Test results of antioxidant activity on the compound C-Sinamalkaliks[4]resorcinarene using the DPPH method (2,2-Diphenyl-1-picrylhydrazyl) using a UV-Vis spectrophotometer at a maximum wavelength of 514 nm. IC50 of 161.1750 ppm with moderate antioxidant activity Testing the antioxidant activity of the compound C-Sinamalkaliks[4]resorcinarene using the ABTS method (2,2'-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) using UV spectrophotometer-Vis is at a maximum wavelength of 750 nm, IC50 value is 2.9661 ppm with very strong antioxidant activity.

Pemanfaatan Pati Ubi Jalar (Ipomoea batatas L.) Sebagai Bahan Baku Pembuatan Plastik Biodegradable dengan Penambahan Plasticizer Gliserol Vinezia Sri Wahyuni; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Research on the utilization of sweet potato starch (Ipomoea batatas L) as a raw material for making plastics biodegradable with the addition of plasticizer glycerol has been successfully carried out. The purpose of this study was to determine the effect of adding plasticizer glycerol to the mechanical, physical, biodegradable and structural properties of plastic biodegradable from sweet potato starch. This research is an experimental study by varying the amount of glycerol as much as 0 mL, 0.2 mL, 0.4 mL, 0.6 mL, 0.8 mL, and 1 mL. The process of making plastic is carried out at a temperature of 70 oC for 15 minutes. Based on the research that has been done, the results show that the more glycerol added, the greater the percentage value of water content and the ability of the plastic to be degraded. The maximum tensile strength was obtained from the addition of 0.4 mL of glycerol of 8.91 Mpa. Plastic biodegradable with the addition of 1 mL of glycerol degraded as much as 83.812% for 6 days. The FTIR spectra showed almost the same peaks between plastics without the addition of glycerol and with the addition of glycerol, the functional groups contained in the plastics included CH, OH, N-H, and C-O.

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

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%.

Co-Authors Alfarisi, Fadil Ananda Putra Andriati Fitria Wati Annisa Dewi Pangestuti Anshar Al Khairi, Varel Ayunda, Sarah Bahrizal Bahrizal Budhi Oktavia Budhi Oktavia Citra Devira Deni Marlina Deski Beri Desy Kurniawati Desy Kurniawati Desy Kurniawaty Dewi Fortuna Khairil Dewi Kristina Dwi Finna Syolendra DWI RAMADHANI Edi Nasra Elfanny Delvia Endang Widaya Nengsih Fadhila, Dina Hardianti, Amirah Salsabila Hary Sanjaya Hesty Parbuntari Indah Nulfia Indang Dewata Iryani Iryani Iryani Iryani Iswendi Iswendi Ivana Putri Laura Dwi Rha Hayu Mahmud Mahmud Manalu, Silvani Indriani MARIAM ULFAH ULFAH Melisa Yolanda Minda Azhar Muhammad Afif Muhammad Farhan Mulia, Melindra Nazulis Z Nivi Suci Kurnia Niza Lian Pernadi Nizar, Umar Kalmar Pernadi, Niza Lian Putri Diana Putri, Dafnesy Rahmadhani R, Yoanatul Hasanah Rahmi, Fathaniah Raviqa Rani Aulia Suhanah Rani Aulia Suhanah Regi Fadila Putra Ridho Hermawan Rido Ardianto Riga Riga Riga, Riga Rini Anggraini Rita Sundari Sabrina, Joya Salsabila Safitri Salsabila, Salsabila Sintha Hafizhah Yonel Siska Oktariza Sri Teguh Priharti Sridevitri, Sridevitri Suryelita . Suryelita, Suryelita Susiyati Safitri Syamsi Aini Teuku Muhamad Khairudin Trisna Kumala Sari Ulfah, Mariam Umar Kalmar Nizar Utami, Esssylia Afriyanti Varel Anshar Al Khairi Vinezia Sri Wahyuni Yogi Fernanda Saputra Yusmaita, Eka Yustini Ma’aruf

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