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All Journal PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman Jurnal Pendidikan Kimia (JPKim) Jurnal Kesmas dan Gizi (JKG) Jurnal Indah Sains dan Klinis CHEDS: Journal of Chemistry, Education, and Science Jurnal Farmanesia Jurnal Multidisiplin Madani (MUDIMA) JURNAL KIMIA SAINTEK DAN PENDIDIKAN Jurnal Pengmas Kestra (JPK) Jurnal ABDIMAS MUTIARA
Barita Aritonang
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Nursing Public Health Social Sciences Other

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ANALISIS SEKTROSKOPI INFRA MERAH DAN MORFOLOGI PADA KOMPOSIT POLIETILENA/KARET ALAM SIKLIS/PRECIPITATED CALCIUM CARBONATE YANG DIHASILKAN MELALUI METODE SISTEM PELARUT Ahmad Hafizullah Ritonga; Novesar Jamarun; Syukri Arief; Hermansyah Aziz; Yulidar Laila Safitri; Suarnikan Hulu; Barita Aritonang
PROSIDING SEMINAR KIMIA Prosiding SNKT Himpunan Mahasiswa Kimia FMIPA UNMUL 2021
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Pada penelitian ini, kami melaporkan bahwa komposit Linear Low-Density Polyethylene (LLDPE)/karet alam siklis(KAS)/precipitated calcium carbonate (PCC) telah berhasil diperoleh melalui metode sistem pelarut. Penelitian inibertujuan untuk menganalisis perubahan gugus fungsi dengan fourier transform infrared (FTIR) dan mengkarakterisasisifat morfologinya dengan scanning elctron microscope (SEM) pada komposit LLDPE/KAS/PCC. Komposit ini dibuatmelalui metode pencampuran dengan sistem pelarut dengan adanya kompatibiliser LLDPE-g-AO. LLDPE, KAS, danLLDPE-g-AO dimasukkan secara bersama-sama ke dalam gelas beaker yang berisi pelarut xylene sebanyak 100 mL,diaduk hingga larut pada suhu 140 oC, lalu ditambahkan dengan bahan pengisi PCC sambil diaduk selama 10 menitagar PCC terdispersi merata. Hasil spektrum FTIR komposit polimer menunjukkan bahwa pita khas dari PCC terlihatpada daerah 872,1 cm-1. Hasil morfologi dengan SEM menunjukkan adanya perubahan signifikan pada strukturpermukaan pada komposit polimer setelah penambahan bahan pengisi PCC.Kata kunci : Komposit, PCC, LLDPE, KAS, Sistem Pelarut.
PEMBUATAN DAN KARAKTERISASI MIKROKOMPOSIT KARET ALAM SIKLIS-MONTMORILLONIT MENGGUNAKAN ASAM OLEAT DAN DIKUMIL PEROKSIDA SEBAGAI BAHAN PENGIKAT CAT EMULSI Barita Aritonang; Tamrin Tamrin
PROSIDING SEMINAR KIMIA 2020: Prosiding Seminar Nasional Kimia Berwawasan Lingkungan (SNK-BL) 2020
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Artikel ini menjelaskan tentang modifikasi karet alam siklis (KAS) dengan asam oleat (AO) menggunakan inisiator dikumil peroksida (DCP) sebagai kompatibiliser dengan metode kopolimer cangkok. Penelitian ini bersifat eksperimental dalam skala laboratorium bertujuan untuk menghasilkan campuran yang homogen dan kompatibel paduan KAS dengan AO pasca penambahan bahan pengisi montmorillonit. Karakterisasi dilakukan dengan analisa FT-IR, DSC, XRD dan SEM. Berdasarkan hasil penelitian yang telah dilakukan proses pencangkokkan AO pada rantai molekul KAS menggunakan inisiator DCP telah berhasil dilakukan, hal ini dapat dibuktikan dari analisa FT-IR muncul pita serapan baru yang tidak ada terdapat pada spektrum FT-IR KAS, yaitu pita serapan pada bilangan gelombang 1708 cm-1 menunjukkan adanya gugus karbonil karboksilat C=O berasal dari monomer OA yang sudah tercangkok pada rantai molekul KAS. Analisa KAS-g-AO dengan DSC menunjukkan telah terjadi penurunan suhu transisi gelas (Tg) sebesar 10.0 0C (dari 90.2 0C turun menjadi 80.2 0C). Analisa dengan SEM struktur morfologi mikrokomposit paduan KAS-g-AO pasca penambahan montmorillonit menghasilkan campuran yang homogen dan kompatibel terlihat seluruh bahan pengisi montmorillonit terdistribusi secara merata sehingga tidak ada terlihat rongga-rongga yang berlubang. Hasil kesimpulan dari penelitian ini adalah modifikasi KAS dengan AO menggunakan DCP dan bahan pengisi montmorillonit telah berhasil dilakukan menghasilkan campuran yang homogen dan kompatibel. Kata kunci : Karet alam siklis, asam oleat, dikumil peroksida, bentonit
MODIFIKASI KARET ALAM SIKLIS DAN MALEAT ANHIDRAT DENGAN ADANYA PENAMBAHAN BENTONIT - CETIL TRIMETIL AMONIUM BROMIDA (CTAB) MENGGUNAKAN INISIATOR BENZOIL PEROKSIDA Ahmad Hafizullah Ritonga; Barita Aritonang; Hendri Faisal
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2018
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Research on the modification of Cyclic Natural Rubber (CNR) and Maleat Anhydrate (MA) with addition of Bentonite - Cetyl Trimethyl Ammonium Bromide (CTAB) using Initiator of Benzoyl Peroxide (BPO) has been done, which aims to find out the appropriate method of modifying CNR and MA using BPO initiators to form CNR-g-MA, and mixed together with Bentonite-CTAB produces a CNR-g-MA/Bentonite-CTAB composite, which results are reviewed by FTIR spectroscopy and SEM analysis. This modification was carried out by dissolving 7 g of CNR with 20 mL of xylene at 45-55 ° C, then mixing the CNR solution with 3 g MA, followed by the addition of 5 phr BPO initiator and addition of 3 phr Bentonite-CTAB while stirring for + 1 hour at the same temperature. The results obtained were analyzed by FTIR spectroscopy showing sharp and strong absorption peaks at wave numbers 1437.80 cm-1, 1311.24 cm-1 and 849.73 cm-1 and the absence of the -OH group on the wavelength number 3598.51 cm-1 and 3411.92 cm-1 indicating Bentonite-CTAB has been mixed in CNR-g-MA. The morphological results with SEM show that Bentonite-CTAB is mixed in CNR-g-MA homogeneously. Keywords: Cyclic Natural Rubber, Maleat Anhydrates, Benzoyl Peroxide, Bentonite, Cetyl TrimethylAmmonium Bromide.
MODIFIKASI KOPOLIMER KARET ALAM SIKLIS GRAFTING ASAM OLEAT MENGGUNAKAN INISIATOR BENZOIL PEROKSIDA DAN BAHAN PENGISI BENTONIT-CETIL TRIMETIL AMONIUM BROMIDA Ahmad Hafizullah Ritonga; Barita Aritonang; Liver Iman Putra Zai
JURNAL KIMIA MULAWARMAN Vol 16 No 1 (2018)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v16i1.726

Abstract

Research on the modification of Cyclic Natural Rubber (CNR) grafting Oleic Acid (OA) copolymer using initiator of Benzoyl Peroxide (BPO) and the filler of bentonite-Cetil Trimethyl Ammonium Bromide (CTAB) has been carried out, which aims to determine the method of modifying Cyclic Natural Rubber (CNR) and Oleic Acid (OA) so it can produce CNR-g-OA copolymer through grafting method with BPO initiator mixed together with bentonite-CTAB. This research was conducted in three stages. The first stage is the process of dissolving CNR using xylene. The second stage is the process of mixing CNR solution and OA with the composition (70:30) phr, followed by the addition of BPO initiator and bentonite-CTAB filler. The third stage is characterization using FTIR and Scanning Electron Microscopy (SEM). The results of the analysis using FT-IR showed an absorption at 1708,23 cm-1 which indicated the presence of C=O bonds from oleic acid which had been grafted on CNR, and increased intensity after addition of bentonite-CTAB at 1568,96 cm-1; 1446,13 cm-1; 1255,66 cm-1; and 866,94 cm-1. Characterization results using SEM showed that the mixing of Bentonite-CTAB in KAS-g-OA was evenly distributed and quite homogeneous.
PENETAPAN KADAR NATRIUM BENZOAT PADA KECAP MANIS YANG TIDAK BERMEREK SECARA ALKALIMETRI Barita Aritonang; Yossy Silalahi
Jurnal Farmanesia Vol 3 No 1 (2016): Jurnal Farmanesia
Publisher : UNIVERSITAS SARI MUTIARA INDONESIA

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Abstract

Kecap adalah sari kedelai yang telah difermentasikan bahan nabati  atau hewani berprotein tinggi didalam larutan garam. Kecap biasanya ditambahkan pengawet natrium benzoat  agar lebih tahan lama dalam penyimpanan. Tujuan penelitian adalah untuk mengetahui kadar natrium benzoat pada kecap manis yang tidak bermerek apakah telah memenuhi persyaratan yang telah ditetapkan oleh Permenkes. Sampel diambil dari seluruh pedagang kecap manis yang tidak bermerekdi sekitar pasar Petisah Medan. Penentuan kadar natrium benzoat pada kecap manis tidak bermerek secara alkalimetri. Hasil penelitian menunjukkan bahwa kecap manis tidak bermerek mengandung kadar natrium benzoat yang berbeda-beda.Kadar natrium benzoat yang tertinggi adalah 707 mg/kg sedangkan yang terendah adalah 85 mg/kg. Batas maksimum yang diperbolehkan oleh Permenkes adalah 600 mg/kg.
Pembuatan Sabun Padat Antiseptik Ekstrak Etanol Kulit Jeruk Lemon (Citrus Limon (L.) Burm. F.) Eka Margaretha Sinaga; Nova Florentina Ambarwati; Barita Aritonang; Ahmad Hafizullah Ritonga
Jurnal Multidisiplin Madani Vol. 2 No. 2 (2022): February 2022
Publisher : PT FORMOSA CENDEKIA GLOBAL

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Abstract

Lemon peel waste (Citrus limon (L.) Burm.F.) contains secondary metabolites that function as antibacterials, such as alkaloids, flavonoids, and triterpenoids. This study aims to determine the formulation of antiseptic solid soap and the antibacterial activity of the ethanolic extract of the lemon peel by the diffusion method. The results showed the best formula for making antiseptic solid soap with ethanolic extract of lemon peel based on the requirements of SNI 06-4085-1996 was at a concentration of F3 (15%), homogeneous, had a pH of 8.54-9.82, foam height was around 3.5-4.7 cm, and a strong inhibition zone of about 12.48 mm. The conclusion of this study is that lemon peel has antibacterial properties that can kill the growth of Staphylococcus aureus bacteria.
Paper making and characterization from waste coconut and tofu dregs Erdiana Gultom; Hestina Hestina; Nova Florentina; Barita Aritonang
Jurnal Pendidikan Kimia (JPKim) Vol 13, No 2 (2021): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.878 KB) | DOI: 10.24114/jpkim.v13i2.27028

Abstract

Research on paper made from coconut and tofu waste has been carried out using the alkalization method of separation technique, with the optimum composition as follows: NaOH concentration used is 3.0% and cooking temperature is 100 0C and the time required is 90 minutes. The results of the catheterization test of paper made from coconut dregs and tofu have a water content of 3.2%; pH 6.9, pulp content 65.75%; cellulose content 80.22%; lignin content 18.27%. The results of the FT-IR spectrum analysis of coconut pulp and tofu pulp are suitable for use as raw materials for making paper because they contain cellulose fibers. This is indicated by the appearance of the O-H hydroxyl group which is observed at a wavenumber of 3312 cm-1. Based on the SEM results, the surface morphology of the coconut pulp and tofu combination paper shows that the surface structure is the denser the fiber bonds, the smaller the fiber diameter, the better the mechanical properties. The results of the research conclusions explain that, paper made from coconut and tofu waste has met the requirements set by SNI 14-0444-1989.Keywords: Paper, Cellulose, Coconut pulp, Tofu pulp, Lignin
PEMBUATAN SABUN PADAT ANTISEPTIK EKSTRAK ETANOL KULIT JERUK LEMON (Citrus limon (L.) Burm. f.) Eka Margaretha Sinaga; Barita Aritonang; Nova Florentina Ambarwati; Ahmad Hafizullah Ritonga
Journal of Indah Science and Clinic Vol. 2 No. 3 (2021)
Publisher : LPPM STIKes Indah Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52622/jisk.v2i3.34

Abstract

One of the herbal plants with antibacterial properties that it can use in solid antiseptic soap is lemon peel (Citrus limon (L.) Burm.F.). This study aims to determine the optimum composition of antiseptic solid soap preparations from the ethanolic extract of lemon peel based on the requirements set by SNI 06-4085-1996 and the antibacterial activity test. The antibacterial activity test was carried out by the good method. Examination of Simplicia characteristics was carried out by phytochemical screening test. The antiseptic solid soap preparation was performed by organoleptic test, pH test, homogeneity test, high foam test, and antibacterial activity test. The concentration variations of antiseptic solid soap preparations were F1(5%), F2(10%), and F3(15%). Based on the results of research that has been carried out, the results of phytochemical screening tests for lemon peels (Citrus limon (L.) Burm.F.) contain secondary metabolites, namely alkaloids, flavonoids, and triterpenoids that function as antibacterial. Antiseptic solid soap made from ethanolic extract of lemon peel has met the requirements set by SNI 06-4085-1996, namely a solid and homogeneous soap with a lemon scent with a pH of 8.71-10.52, high foam 4.7-4.9 cm, as well as free alkali in a safe condition against the skin. Based on the results of the antibacterial activity test of solid antiseptic soap, the ethanolic extract of lemon peel (Citrus limon (L.) Burm.F.) can inhibit the growth of Staphylococcus aureus bacteria. At a concentration of F1(5%) has a zone of moderate inhibition of 10.26 mm; at concentration F2(10%) has a strong inhibition zone of 11.78 mm; at the concentration of F3(15%) has a strong inhibition zone of 12.57 mm. Lemon peel extract can be formulated into a solid antiseptic soap with an optimum concentration of F3 (15%).
Sintesis dan Karakterisasi Arang Aktif Dari Kulit Salak Sebagai Adsorben Terhadap Kadar BOD, COD dan TSS Pada Limbah Cair Industri Tekstil Barita Aritonang; Nova Florentina Ambarwati; Eka Margaretha Sinaga; Ahmad Hafizullah Ritonga
Jurnal Multidisiplin Madani Vol. 2 No. 6 (2022): June 2022
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/mudima.v2i6.441

Abstract

Textile liquid waste contains organic compounds and suspended solids such as BOD, COD, and TSS, which can cause environmental pollution. This study aims to determine the levels of BOD, COD, and TSS in textile wastewater using activated charcoal from the skin of salak before and after activation with phosphoric acid (H3PO4) at a concentration of 6%.The research results that have been carried out, on the making of activated charcoal from the skin of salak have been successfully carried out and meet the requirements of SNI 06-3730-1995, obtaining 2.4% water content, 2.3% ash content, and 476 mg/L iodine absorption. FT-IR spectrum analysis activated charcoal from the skin of salak has an O-H hydroxyl group at the peak of 3817 cm-1, C=O carbonyl group at 1713 cm-1, and C-O ether group at 1175 cm-1. FT-IR spectrum analysis activated charcoal from the skin of salak has O-H hydroxyl group at the peak of 3817 cm-1, C=O carbonyl group at 1713 cm-1, and C-O ether group at 1175 cm-1. Based on SEM analysis, activated charcoal from activated skin of salak has larger pores and surface area than before activation. Based on atomic absorption spectrophotometry analysis of textile wastewater without the addition of activated charcoal, the levels of BOD were 480 mg/L, COD 650 mg/L, and TSS 470 mg/L. After the addition of unactivated activated charcoal, the levels of BOD were 120 mg/L, COD 150 mg/L, and TSS 140 mg/L. After the addition of activated charcoal, BOD levels were 60 mg/L, COD 80 mg/L, and TSS 95 mg/L.This study concludes that activated charcoal from the skin of salak can reduce, levels of BOD, COD, and TSS in textile waste and has met the requirements set out in the Regulation of the Minister of the Environment of the Republic of Indonesia Number 5 of 2014.
Aktivitas Antibakteri Ekstrak Etanol Kulit Markisa Ungu (Passiflora Edulis Sims) Terhadap Bakteri Propionibacterium Acnes Karnirius Harefa; Barita Aritonang; Ahmad Hafizullah Ritonga
Jurnal Multidisiplin Madani Vol. 2 No. 6 (2022): June 2022
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/mudima.v2i6.469

Abstract

Propionibacterium acnes is a gram-positive bacterium that causes acne. This study aimed to determine the antibacterial activity of the ethanolic extract of purple passion fruit peel (Passiflora edulis Sims) against Propionibacterium acnes bacteria. The method used to determine the antibacterial activity of the ethanolic extract of passion fruit peel was a paper disc (Kirby-Bauer test). Based on the results of phytochemical screening, the purple passion fruit peel simplicia powder contains flavonoid compounds, saponins, tannins, steroids, and triterpenoids that function as antimicrobials. Based on the antibacterial activity test, the purple passion fruit peel ethanol extract at concentrations of 5, 10, 15, and 20% effectively inhibited the growth of Propionibacterium acnes bacteria. This can be proven from the results of the diameter of the inhibition zone that there was an increase in antibacterial effectiveness along with the increase in the concentration of purple passion fruit peel extract in inhibiting the growth of Propionibacterium acnes bacteria, namely at a concentration of 5%, the average diameter of the inhibition zone was 14.9 mm, then at a concentration of 10% the average diameter of the inhibition zone is 15.3 mm, then at a concentration of 15% the average diameter of the inhibition zone is 17.2 mm, while at a maximum concentration of 20% the average diameter of the inhibition zone is 20.1 mm. The research results conclude that the purple passion fruit rind ethanol extract effectively inhibits the growth of Propionibacterium acnes bacteria at a concentration of 20% with an inhibition zone diameter of 20.1 mm.
Co-Authors Ahmad Hafizullah Ritonga Ahmad Hafizullah Ritonga Ambarwati, Nova Florentina Cut Masyitah Thaib Cut masyithah Debi Meilani Eka M Sinaga Eka Magareta Sinaga Eka Margareta Sinaga Eka Margareta Sinaga Eka Margareth Sinaga Eka Margaretha Sinaga Elly Sitorus Erdiana Gultom Erdiana Gultom Erdiana Gultom Erdiana Gultom Erdiana Gultom Erdiana Gultom Ernita Siagian Fadlilah Widyaningsih Hasni Yaturramadhan Harahap Hendri Faisal Herlina . Hermansyah Aziz Hestina . Hestina Hestina Hestina Hestina Hestina Hestina Karnirius Harefa Karnirius Harefa Lenny Novita Liver Iman Putra Zai Nova Florentina Nova Florentina Ambarwati Nova Florentina Ambarwati Nova Florentina Ambarwati Nova Florentina Ambarwati Novesar Jamarun Rahmad Gurusinga Riah Ukur Ginting Rima Anggeraini Rotua Sumihar Sitorus Salomo Sijabat Sinaga, Eka Margaretha Suarnikan Hulu Supartiningsih Supartiningsih Syukri Arief Tamrin Tamrin Yossy Silalahi Yulidar Laila Safitri Yunita Sari