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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Kimia Universitas Brawijaya Science and Technology Indonesia Makara Journal of Science
Elvina Dhiaul Iftitah
Department of Chemistry, University of Brawijaya, Jl. Veteran, Malang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Materials Science & Nanotechnology Physics

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PENGARUH VARIASI JUMLAH MOL ASETONITRIL TERHADAP PRODUK SINTESIS SENYAWA ORGANONITROGEN BERBASIS α-PINENA HASIL ISOLASI DARI MINYAK TERPENTIN Wulandari, Ivtarina; Rahman, Moh. Farid; Iftitah, Elvina Dhiaul
Jurnal Ilmu Kimia Universitas Brawijaya Vol 2, No 1 (2013)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh variasi jumlah mol asetonitril terhadap kuantitas produk senyawa organonitrogen yang disintesis dari α-pinena dan asetonitril. Isolasi α-pinena dari minyak terpentin dilakukan dengan menggunakan metode distilasi fraksinasi. Sintesis senyawa organonitrogen dilakukan pada temperatur ruang selama 5 jam dengan perbandingan mol α-pinena : asetonitril : asam sulfat (1:1:4), (1:5:4), dan (1:10:4). Hasil penelitian menunjukkan kadar senyawa α-pinena hasil distilasi adalah 88,46%. Produk yang dihasilkan adalah N-(1,7,7-trimetilbisiklo [2,2,2] heptan-2-il)asetamida dan N-(2,6,6-trimetilbisiklo [3,1,1] heptan-2-il)asetamida. Efisiensi produk N-(1,7,7-trimetilbisiklo [2,2,2] heptan-2-il)asetamida pada variasi (1:1:4), (1:5:4), dan (1:10:4) adalah 7,78%, 10,277% dan 1,45%. Sedangkan produk N-(2,6,6-trimetilbisiklo [3,1,1] heptan-2-il)asetamida masing-masing adalah 2,34%, 2,67%, dan 0,188%. Kata kunci: α-pinena, minyak terpentin, reaksi Ritter, sintesis senyawa organonitrogen ABSTRACT This research aimed to determine the effect of variation of moles acetonitrile on the quantity of organonitrogen compound synthesized products from α-pinene and acetonitrile. The isolation of α-pinene from turpentine oil over fractional distillation method. The synthesis of organonitrogen compounds is done at room temperature for 5 hours with the mole ratio α-pinene : acetonitrile : sulfuric acid (1:1:4), (1:5:4), and (1:10:4). These results showed that the amount of α-pinene produced from fractional distillation is 88,46%. Organonitrogen compounds were obtained are N-(1,7,7-trimetilbisiklo [2,2,2] heptane-2-yl) acetamide and N-(2,6,6-trimetilbisiklo [3,1,1] heptane-2-yl) acetamide. Efficiency of product N-(1,7,7-trimetilbisiklo[2,2,2] heptan-2-yl)acetamide of  variation (1:1:4), (1:5:4), and (1:10:4) are 7,78%, 10,277% and 1,45%. Whereas  product N-(2,6,6-trimetilbisiklo[3,1,1]heptan-2-yl)acetamide are 2,34%, 2,67%, and 0,188%. Key words: α-pinene, turpentine oil, Ritter reaction, synthesis organonitrogen compound
PENGARUH LAMA WAKTU PENYIMPANAN dan PENYINARAN CAHAYATERHADAP SITRONELAL SERTA UJI TOKSISITAS dengan MENGGUNAKAN METODE BSLT(BRINE SHRIMP LETHALITY TEST) Pertiwi, Gilly Putri; Iftitah, Elvina Dhiaul; Suratmo, Suratmo
Jurnal Ilmu Kimia Universitas Brawijaya Vol 1, No 1 (2014)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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Pada penelitian ini pengaruh lama waktu penyimpanan dan penyinaran cahaya pada sitronelal diuji untuk mengetahui perubahan kandungan. Toksisitas sitronelal sebelum dan setelah penyimpanan dan penyinaran juga diuji menggunakan metode BSLT. Penyimpanan sitronelal dilakukan dalam botol vial bening dan vial gelap yang  disimpan dalam kotak kayu dengan perlakuan penyimpanan yang berbeda selama 4 minggu. Kotak yang pertama disinari lampu selama 24 jam (selanjutnya disebut kotak A), kotak kedua adalah kotak yang dua sisinya terbuat dari kasa selanjutnya disebut kotak B), dan kotak ketiga adalah kotak tertutup yang berwarna hitam (selanjutnya disebut kotak C). Analisis kandungan sitronelal sebelum dan sesudah penyimpanan menggunakan Kromatografi Gas-Spektrometer Massa (KG-SM). Hasil analisa KG-SM menunjukkan bahwa persen area berubah dari 45,29% menjadi 52,58% dan terdapat perbedaan jumlah puncak sampel setelah disimpan selama 2 minggu dalam kotak C dalam botol vial bening. Sampel ini kemudian diuji toksisitasnya dengan BSLT. Hasil uji BSLT menunjukkan besarnya nilai LC50 sitronelal awal sebesar 71,1 ppm dan sebesar 132,79 ppm pada sitronelal setelah 2 minggu penyimpanan serta 324,97 ppm pada sitronelal setelah 4 minggu penyimpanan sehingga menunjukkan bahwa sitronelal dengan penyimpanan 2 minggu lebih toksik dibanding dengan sitronelal yang disimpan selama 4 minggu
STUDI REAKSI HIDROGENASI SENYAWA FURFURAL DENGAN KATALIS Cu/γ-Al2O3 Mustangin, Mustangin; Ulfa, Siti Mariyah; Iftitah, Elvina Dhiaul
Jurnal Ilmu Kimia Universitas Brawijaya Vol 2, No 1 (2014)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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ABSTRAK Telah dilakukan reaksi hidrogenasi terhadap furfural dengan menggunakan katalis Cu/γ-Al­2O3 pada atmosfer gas H2. Penelitian ini dilakukan dalam beberapa tahap, yaitu preparasi katalis Cu/γ-Al2O3, karakterisasi katalis, dan reaksi hidrogenasi furfural dengan katalis Cu/γ-Al2O3. Katalis dikarakterisasi dengan X-ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX), dan Atomic Absorption Spectrometry (AAS), sedangkan produk hasil reaksi hidrogenasi diidentifikasi dengan Fourier Transform Infrared Spectroscopy (FTIR). Berdasarkan analisis menggunakan XRD dan SEM dapat diketahui bahwa Cu telah terimpregnasi pada γ-Al2O3. Analisis AAS menunjukkan persentase Cu yang terimpregnasi sebesar 4,56%. Uji aktivitas katalis dilakukan pada suhu reaksi 150 dan 180 oC pada waktu 1; 2; 2,5 dan 3 jam. Konversi furfural terbaik didapatkan pada waktu 2 jam dan suhu 150 oC sebesar 23,37%. Produk reaksi hidrogenasi yang mengandung gugus hidroksil (-OH) paling banyak didapatkan pada waktu 2,5 jam dan suhu 180 oC sebesar 23,32 ppm.   Kata Kunci: furfural, katalis Cu/γ-Al2O3, konversi, reaksi hidrogenasi
STUDI REAKSI HIDROGENASI TERHADAP FURFURAL MENGGUNAKAN KATALIS Ni/γ-Al2O3 Pratama, Safreno Panggih; Ulfa, Siti Mariyah; Iftitah, Elvina Dhiaul
Jurnal Ilmu Kimia Universitas Brawijaya Vol 2, No 1 (2014)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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Abstract

Hidrogenasi selektif terhadap furfural menjadi produk alkohol telah dilakukan menggunakan katalis Ni/γ-Al­2O3. Beberapa tahapan dalam penelitian ini adalah preparasi katalis Ni/γ-Al­2O3, karakterisasi katalis, dan reaksi hidrogenasi katalitik. Karakterisasi katalis dilakukan menggunakan X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), dan Atomic Absorption Spectrometry (AAS) sedangkan produk hasil reaksi hidrogenasi dianalisis menggunakan Fourier Transform Infrared Spectroscopy (FTIR). Analisis menggunakan AAS dilakukan untuk mengetahui kadar Ni dalam katalis Ni/γ-Al­2O3 yaitu sebesar 9,96%. Reaksi hidrogenasi dilakukan pada temperatur 150 dan 180 °C selama 1; 2; 2,5; dan 3 jam dalam kondisi atmosfer hidrogen. Kondisi optimum untuk konversi furfural adalah pada temperatur 150 °C selama dua jam reaksi sebesar 44,76% dengan selektivitas terhadap produk alkohol sebesar 70,18%. Kata kunci: furfural, katalis Ni/γ-Al2O3, produk alkohol, reaksi hidrogenasi
STUDI REAKSI KONDENSASI-HIDROGENASI ANTARA FURFURAL DAN ASETON MENGGUNAKAN KATALIS Ni/MgO Pramesti, Indah Nur; Ulfa, Siti Mariyah; Iftitah, Elvina Dhiaul
Jurnal Ilmu Kimia Universitas Brawijaya Vol 1, No 1 (2015)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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Penelitian ini bertujuan untuk mengetahui aktivitas katalis Ni/MgO pada reaksi kondensasi-hidrogenasi furfural dengan aseton. Katalis Ni/MgO disiapkan melalui metode impregnasi basah prekursor garam Ni(NO3)2.6H2O ke dalam MgO sebagai pengemban. Karakterisasi katalis dilakukan dengan metode difraksi sinar-X (DSX) dan fluorosensi sinar-X. Uji aktivitas katalis dilakukan pada reaksi kondensasi dan hidrogenasi terhadap furfural dan aseton menggunakan autoclave oil batch reactor. Reaksi kondensasi dilakukan menggunakan pelarut air pada temperatur 100 oC selama 8 jam. Selanjutnya reaksi hidrogenasi dilakukan menggunakan pelarut isopropanol pada temperatur 120 oC selama 7 jam. Hasil karakterisasi produk reaksi menggunakan FT-IR menunjukkan terbentuknya produk kondensasi yaitu monomer 4-furanil-3-butena-2-on (C8) dan  dimer 1,5-difuranil-1,4-pentadiena-3-on (C13), sedangkan produk hidrogenasi tidak terbentuk.
STUDI REAKSI KONDENSASI-HIDROGENASI ANTARA FURFURAL DAN ASETON MENGGUNAKAN KATALIS CAMPURAN MgO DAN Ni/γ-Al2O3 Mustafidah, Hidayatul; Ulfa, Siti Mariyah; Iftitah, Elvina Dhiaul
Jurnal Ilmu Kimia Universitas Brawijaya Vol 1, No 1 (2015)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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Abstract

Penelitian ini bertujuan untuk mengetahui aktivitas katalis campuran MgO dan Ni/γ-Al2O3 pada reaksi kondensasi-hidrogenasi antara furfural dan aseton. Katalis Ni/γ-Al2O3dibuat secara impregnasi basah dengan mencampurakan Ni(NO3)2.6H2O dan γ-Al2O3 dalam metanol. Kemudian dikalsinasi dan direduksi pada suhu 500°C. Karakterisasi katalis dilakukan dengan metode difraksi sinar-X dan fluorosensi sinar-X.Reaksi  dilakukan dengan perbandingan mol furfural dan aseton (1:1) menggunakan autoclave oil batch reactor. Reaksi kondensasi menggunakan pelarut air pada suhu 100°C, 6 jam menunjukkan terbentuknya produk kondensasi.Produk kondensasi (4-furanil-3 butena-2-on dan 1,5-difuranil-1,4-pentadiena-3-on), selanjutnya dilakukan reaksi hidrogenasi menggunakan pelarut isopropanol pada suhu 120°C, 7 jampada atmosfer H2. Hasil identifikasi menggunakan FT-IR  tidak menunjukkan terbentuknya produk hidrogenasi. Kata kunci:furfural, hidrogenasi, kondensasi, MgO, Ni/γ-Al2O3.
One-Pot Transformation of (R)-(+)-Citronellal over a Bifunctional Ni/ZnBr2/β-Zeolite Catalyst Nisyak, Khoirun; Iftitah, Elvina Dhiaul; Tjahjanto, Rachmat Triandi
Makara Journal of Science Vol. 17, No. 3
Publisher : UI Scholars Hub

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Use of CoO/ZnAl2O4 Catalysts and Microwaved Assisted in Vanillin Synthesis Birhi, Damiana Nofita; Iftitah, Elvina Dhiaul; Warsito, Warsito
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 1, May 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i1.29727

Abstract

Vanillin is a main component in vanilla, which is widely used in the industrial world. Market demand for vanillin extract continues to increase, while the availability of vanilla pods is decreasing. To overcome this problem, research on the synthesis of vanillin continues to be carried out and develops every year. This research aims to examine the conversion level and selectivity of the catalyst as well as microwave radiation efficiency usage in vanillin synthesis. Catalyst CoO/ZnAl2O4 was synthesized from CoO and ZnAl2O4 using the impregnation method, then analyzed using FTIR, XRD, and SEM-EDX. Vanillin synthesis was conducted in two steps, incorporating microwave usage at 120oC, underwent 30 minutes to be completed then followed by oxidation around 10- and 15-minutes involving nitrobenzene also 1%, 4%, and 7% of catalysts CoO/ZnAl2O4. The result showed that during 10 and 15 minutes, the selectivity value and various yield percentages for each time variation and catalyst loading of vanillin had been successfully 100% converted. The best result was obtained using CoO/ZnAl2O4 with 4% catalyst loading for 15 minutes. The selectivity value and yield percentages were 67.78% and 7.5%. A one-step vanillin synthesis with conventional reflux could also be a comparison. The reactions were done at 130oC for 2 and 3 hours with 4% catalyst loading.
Effect of Edible Coating Material Composition Based on Chitosan-Gelatin-CaCl2 and Cinnamon (Cinnamomum verum) Essential Oil on the Protection of Cocoa Beans (Theobroma cacao L.) During Storage Putri, Aufy Nuraini; Soesantyo, Adi Kurnia; Iftitah, Elvina Dhiaul
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.528-537

Abstract

Chocolate, a highly demanded commodity, is derived from cocoa beans which undergo fermentation and drying to achieve a safe moisture content of up to 7.5% for storage. Storage conditions significantly impact cocoa bean quality. While edible coatings are commonly used to preserve food quality during storage, their application to cocoa beans using composite polymers and essential oils remains underexplored. This study aimed to evaluate the effectiveness of composite edible coatings, specifically chitosan-gelatinCaCl2 with cinnamon essential oil, in preserving cocoa bean quality over a 28-day storage period. Six variations of coating solutions were applied to peeled cocoa beans: K1= chitosan:gelatin 1:2 + CaCl2 1%, K2= chitosan:gelatin 1:2 + CaCl2 1% + 0.1% essential oil, K3=chitosan:gelatin 1:2 + CaCl2 1% + 0.3% essential oil, K4= chitosan:gelatin 2:1 + CaCl2 1%, K5= chitosan:gelatin 2:1 + CaCl2 1% + 0.1% essential oil, and K6= chitosan:gelatin 2:1 + CaCl2 1% + 0.3% essential oil, and K0 serving as a control without treatment. Quality parameters such as water content, fat content, and pH were analysed using ANOVA (α = 0.05). The results indicated that edible coatings significantly protected against changes in fat content but did not significantly affect water content or pH. The most effective treatment was K6, composed of chitosan:gelatin with the ratio of 2:1 + 1% CaCl2 + 0.3% cinnamon essential oil, providing optimal protection during storage.
Edible Coating of Cherry Tomatoes (Solanum lycopersicum) Based on Chitosan Nanoparticles (NPCh) and Mint (Mentha piperita) Essentials Oil with Addition of Aloe Vera Gel Iftitah, Elvina Dhiaul; Putri, Aufy Nuraini; Soesantyo, Adi Kurnia
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.336-349

Abstract

Cherry tomatoes, as climacteric fruits, continue ripening after harvest, making them susceptible to Xanthomonas campestris bacteria. One method that has been developed to prevent this from happening is applying edible coating with polysaccharides such as chitosan. However, the particles tend to be large and antibacterial activity is not optimal. Therefore, an edible coating was developed using nanochitosan (NPCh) and mint essential oil (EO), enhanced with aloe vera. NPCh was synthesized via ionic gelation with chitosan: STPP ratios of 2:1, 3:1, and 5:1, and mint EO added at 0.2, 0.4, and 0.6 mL. Coatings were applied by dipping, and quality was assessed over 11 days using weight loss, color, Lycopene, Vitamin C parameters, and data result was analyzed with ANOVA (Sig. 0.05). Texture organoleptic tests were evaluated by 10 panelist. Antibacterial activity against Xanthomonas campestris was analyzed in silico. Results showed the smallest NPCh particle size (197 nm) with a 5:1 ratio, and TEM confirmed spherical shapes. Tomatoes without coating (K-) had significantly lower quality compared to coated samples (K+, K1-K6). Samples with EO (K3-K5) preserved physical (weight, color) and nutritional quality (Vitamin C, Lycopene) better, with K5 (0.6 mL EO) showing optimal results. However, there are no significant differences were observed between K5 and K6 (adding aloe vera gel) in maintaining tomato quality. Texture analysis also identified K5 as the most preferred. In silico studies demonstrated strong antibacterial potential for mint EO and aloe vera compounds, with binding affinities (-3.97 to -5.76 kcal/mol) surpassing native ligand and positive control.
Co-Authors A.A. Ketut Agung Cahyawan W Cahyani, Risfiah Ruli Damiana Nofita Birhi Hakim, Muh. Supwatul Hidayatul Mustafidah Indah Nur Pramesti Khoirun Nisyak Marvin Horale Pasaribu Moh. Farid Rahman Mokhamat Ariefin Pertiwi, Gilly Putri Pratama, Safreno Panggih Putri, Aufy Nuraini Rachmat Triandi Tjahjanto Siti Mariyah Ulfa Soesantyo, Adi Kurnia Suma, Joy Angel Aria Suratmo Suratmo Tety Wahyuningsih Manurung Warsito Warsito Wulandari, Ivtarina