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ISOLASI SENYAWA ASAM LEMAK DAN UJI BIOAKTIVITAS ANTIOKSIDAN DARI TUMBUHAN KACANG KAYU (Cajanus cajan (L) Millsp) DARI PULAU POTERAN-MADURA Debora Ariyani; Dini Nur Fauzia; Taslim Ersam
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2019
Publisher : PROSIDING SEMINAR KIMIA

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Radikal bebas merupakan molekul atau atom yang tidak stabil karena memiliki satu atau lebih elektron yang tidak berpasangan. Ketika radikal bebas ini mengambil elektron dari sel tubuh manusia, dapat menyebabkan perubahan struktur DNA (Deoxyribo Nucleic Acid) sehingga timbul sel-sel mutan. Zat yang dapat menunda atau mencegah terjadinya reaksi oksidasi radikal bebas adalah antioksidan. Dalam penelitian ini dilakukan isolasi senyawa asam lemak dari tumbuhan kacang kayu (Cajanus cajan (L) Millsp) yang terdapat di Pulau Poteran-Madura serta menentukan bioaktivitas antioksidannya. Selain itu pada penelitian ini dilakukan uji pendahuluan antioksidan aktivitas, antioksidan dari turunan senyawa terpenoid secara menggunakan DPPH (2,2-difenil-1-pikrilhidrazil). Metode isolasi yang digunakan adalah maserasi dengan pelarut metanol yang kemudian difraksinasi. Ekstrak pekat metanol difraksinasi dengan Kromatografi Cair Vakum (KCV) menggunakan eluen metilen klorida dan etil asetat yang berdasarkan perbedaan kepolarannya. Fraksi yang dihasilkan kemudian dimurnikan dengan rekristalisasi menggunakan pelarut etil asetat dan n-heksana. Senyawa murni yang diperoleh dilakukan uji titik leleh, serta dilakukan uji pendahuluan bioaktivitas antioksidan dengan metode DPPH. Kata Kunci: Cajanus cajan, Antioksidan, DPPH (2,2-difenil-1-pikrilhidrazil)

Analisis Unjuk Kerja Pompa P-01 di Unit SWD PLANT (STUDI KASUS di PT.PERTAMINA REFINERY UNIT V BALIKPAPAN) I Ketut Warsa; Eka Megawati; Debora Ariyani
Jurnal Chemurgy Vol 2, No 2 (2018): Jurnal Chemurgy-Desember 2018
Publisher : Universitas Mulawarman

Penelitian ini bertujuan untuk mengetahui seberapa besar efisiensi berdasarkan data operasi terhadap performance test pompa sentrifugal tersebut. Pompa P-01 berjenis sentrifugal berfungsi mensuplai air laut ke bagian evaporator heat rejection, inter condenser dan pendingin kondensat pada sistem SWD Plant. Selama ini flow mengalami penurunan dengan indikasi pada FCV-101. Diperkirakan pompa tersebut sudah mengalami penurunan unjuk kerja (efisiensi). Berdasarkan hasil perhitungan dari data operasi didapat efisiensi sebesar 75,2% versus hasil performance test 83,0% (penurunan sebesar 7,8%). Hal tersebut disebabkan oleh adanya pembesaran clearence pada casing wearing ring dengan impeller wearing ring yangditandai penurunan kapasitas dari 2352 m3/jam menjadi 2190 m3/jam.Kata Kunci : SWD Plant, Pompa P-01, Unjuk Kerja

IDENTIFIKASI EKSTRAK BUAH NIPAH (Nypa Fruticans Wurmb) DENGAN VARIASI MASSA MENGGUNAKAN PELARUT METANOL Debora Ariyani Panjaitan
Jurnal Teknovasi : Jurnal Teknik dan Inovasi Vol 7, No 3 (2020): TEKNOVASI DESEMBER 2020
Publisher : LPPM Politeknik LP3I Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55445/teknovasi.v7i3.449

Indonesia has many sources of vegetable oil that can be used as a renewable energy source. One of the vegetable oil sources with great potential to be developed is palm fruit (Nypa Fruticans Wurmb). Nipah fruit is one of the raw materials used in this study, using the extraction method and methanol as the solvent. The research was conducted with various mass variations of 30 grams, 35 grams, 40 grams, 45 grams and 50 grams. The extracted oil is characterized by a fragrant odor, clear yellow color and is volatile. From the results of the extraction of nipah fruit then tests were carried out which included% Yield, pH, Free Fatty Acid (FFA), Iodine Number and Density. From the test results, it was found that the average yield of palm fruit oil was 11.634%, where the highest% yield was found in the 35 gram sample, the pH number for 5 samples showed the number 6,% FFA of palm fruit oil on average 0.8%, the iod number of fruit oil nipah an average of 0.0272 and the specific gravity of nipah fruit oil an average of 0.654 gram / ml.

Pengaruh Suhu Terhadap Karakteristik Arang Hasil Pirolisis Kulit Kolang-Kaling (Arenga pinnata) Yuniarti Yuniarti; Eka Megawati; Ana Dewi; Debora Ariyani; Meita Rezki Vegatama; Ain Sahara
DISTILAT: JURNAL TEKNOLOGI SEPARASI Vol 8, No 4 (2022): December 2022
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v8i4.410

ABSTRACTSugar palm plants are included in the top ten plantation commodities in East Kalimantan. So far, kolang-kaling fruit peel waste has not been widely used, except for fertilizer. Palm peel waste has a non-uniform texture, but the inside is hard, so it can be used to make charcoal. Charcoal is made by pyrolysis process and can be used as raw material for briquettes as a new renewable energy source. This study aims to obtain biochar as a raw material for making briquettes with the highest calorific value through the pyrolysis process. The manufacture of biochar begins with the drying process of the raw materials and then proceeds with heating the sample in a pyrolysis reactor for 1 hour. The process takes place with the constant variable is the sample weight of 500 g and the heating time for 1 hour, and the variable that changes is the combustion temperature. Pyrolysis was carried out at temperatures of 200 °C, 250 °C, 300 °C, 350 °C, and 400 °C. The mass of charcoal obtained was 487.23 g, 438.37 g, 402.03 g, 318.1 g and 278.84 g. The resulting calorific value is 4158.7 cal/g, 4432.5 cal/g, 4620.2 cal/g and 4840.7 cal/g. The ash content were 12.01%, 14.64%, 14.99%, 15.25% 21.98%, respectively. Volatile Matter obtained 76.50%, 69.67%, 61.68%, 56.71%, 47.15%. While the fixed carbon biochar is 0.80%, 8.93%, 9 78%, 11.30%, 16.31%. The characteristics of the pyrolysis biochar are seen by proximate testing. Biochar with the highest calorific value was obtained at a temperature of 400 °C, namely 4840.7 cal/g.Keywords: Palm fruit peel, Calorific value, Pyrolysis, Charcoal

Pengaruh Waktu Reaksi Pembuatan Biodiesel dari Minyak Jelantah dengan Bantuan Katalis Bassa NaOH terhadap Sifat Fisika dan Kimia Produk Biodiesel Amirul Mukminin; Eka Megawati; Debora Ariyani; I Ketut Warsa; Junety Monde; Sapril Sapril
Journal on Education Vol 5 No 2 (2023): Journal on Education: Volume 5 Nomor 2 Tahun 2023
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v5i2.1250

The effect of the transesterification reaction time of 0.6% mass % NaOH catalyst in the formation of methyl ester (biodiesel) made from used waste cooking oil as raw material 6 times usage and methanol 1: 5 mass has been studied at 60°C. The reaction times used were 30, 40, and 45 minutes. All samples resulting from the transesterification reaction have been studied for their chemical and physical properties. Parameters of chemical properties included in the Indonesian National Standard (SNI) for all samples were % FFA, pH, while the water content was above the SNI standard. The physical property parameters for all samples that meet SNI are only flash point, color and 90% distillation. While the density of all test samples was lower than the SNI which was set at 850-890 Kg/m3, the results obtained for reaction times of 30, 40 and 45 minutes were 828, 833 and 836 Kg/m3 respectively. The highest yield was owned by a reaction time of 40 minutes, namely 80%. As for the reaction time of 35 and 45 minutes respectively 79 and 65%.

Pengaruh Waktu Reaksi Pembuatan Biodiesel dari Minyak Jelantah dengan Bantuan Katalis Bassa NaOH terhadap Sifat Fisika dan Kimia Produk Biodiesel Amirul Mukminin; Eka Megawati; Debora Ariyani; I Ketut Warsa; Junety Monde; Sapril Sapril
Journal on Education Vol 5 No 2 (2023): Journal on Education: Volume 5 Nomor 2 Tahun 2023
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar

The effect of the transesterification reaction time of 0.6% mass % NaOH catalyst in the formation of methyl ester (biodiesel) made from used waste cooking oil as raw material 6 times usage and methanol 1: 5 mass has been studied at 60°C. The reaction times used were 30, 40, and 45 minutes. All samples resulting from the transesterification reaction have been studied for their chemical and physical properties. Parameters of chemical properties included in the Indonesian National Standard (SNI) for all samples were % FFA, pH, while the water content was above the SNI standard. The physical property parameters for all samples that meet SNI are only flash point, color and 90% distillation. While the density of all test samples was lower than the SNI which was set at 850-890 Kg/m3, the results obtained for reaction times of 30, 40 and 45 minutes were 828, 833 and 836 Kg/m3 respectively. The highest yield was owned by a reaction time of 40 minutes, namely 80%. As for the reaction time of 35 and 45 minutes respectively 79 and 65%.

PENGARUH HEATING RATE TERHADAP KARAKTERISTIK NILAI KALOR LIMBAH KULIT BUAH NIPAH (NYPA FRUTICANS (THUNB.) WURMB) PADA PROSES SLOW PIROLISIS Yuniarti Yuniarti; Debora Ariyani; Eka Megawati
PETROGAS: Journal of Energy and Technology Vol 2, No 2 (2020): October
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v3i2.72

Nipah-Nipah plants grow mostly in the confluence of rivers and seas. This plant has the potential to maximize all parts of the tree. Nipah fruit can be used for Nata Frutican and the basic ingredients for making flour. Unused fruit shells have a hard texture, similar to the texture of coconut shells. To increase the calorific value of this fruit peel charcoal, a pyrolysis process is carried out. The samples were separated from the following waste and dried in direct sunlight. The dry sample is crushed and then put into the combustion reactor. Pyrolysis was carried out at a constant temperature of 500°C with variations in the heating rate of 2°C/minute, 4°C/minute, 6°C/minute, 8°C/minute, and 10°C/minute and holding time for 1 hour. The results showed that the calorific value decreased with increasing heating rate. The highest calorific value is at the lowest heating rate. The calorific value at a heating rate of 2°C/minute is 6841, 02 cal/gram. ; 4°C/minute calorific value is 6811.59 cal/gram; 6°C/minute of 6745.07 cal/gram; 8°C/minute is 6656.59 cal/gram and at 10°C/minute is 6570.41 cal/gram

PEMBUATAN BIODIESESL DAN PENGARUH JENIS PELARUT DAN MASSA BIJI TERHADAP % YIELD EKSTRAK MINYAK BIJI KETAPANG (Terminalia catappa Linn) Debora Ariyani; Eka Megawati; Prapti Ira; Arnelia Sadesi; Mersya Andre Sugiarto
PETROGAS: Journal of Energy and Technology Vol 2, No 1 (2020): March
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v2i1.33

Ketapang (Terminalia cattapa Linn) merupakan salah satu tumbuhan yang menghasilkan minyak nabati. Keterbatasan akan bahan baku untuk menghasilkan minyak yang dapat dikonversikan menjadi bahan baku alternatife pengganti minyak bumi menyebabkan berkembangnya penelitian untuk mencari tumbuhan yang berpotensi sebagai menghasilkan minyak yang dapat dijadikan bahan baku biodiesel. Penelitian ini bertujuan untuk mengetahui identifikasi dan hasil transesterifikasi dari ekstrak biji ketapang Metode yang dilakukan untuk menghasilkan minyak yang dapat dijadikan bahan baku biodiesel. Metode yang dilakukan untuk menghasilkan minyak adalah ekstraksi (perkolasi) dengan variasi massa 25 gram, 30 gram, 35 gram, 40 gram, 45 gram dan 50 gram dengan lamanya siklus ekstraksi 8 siklus. Hasil penelitian menunjukkan bahwa kadar minyak yang dimiliki ketapang mencapai 27,28% yang optimum pada penelitian ini dipengaruhi oleh variable massa, dengan massa 40 gram. Berat jenisnya dihasilkan 0,77 – 0,80 gr/ml, kandungan asam lemak bebas (%FFA) 3,7%-4,8%. Angka iod 0,22-0,33.

PENGARUH 6, 8 DAN 10 KALI PEMAKAIAN MINYAK JELANTAH TERHADAP RENDEMEN HASIL REAKSI TRANSESTERIFIKASI MENGGUNAKAN KATALIS BASA HOMOGEN NaOH Amirul Mukminin; Debora Ariyani; Eka Megawati; Yuniarti Yuniarti
JURNAL INOVASI PENDIDIKAN DAN SAINS Vol 4 No 2 (2023): Agustus
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Nahdlatul Wathan Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51673/jips.v4i2.1709

Telah dilakukan penelitan pengaruh pemakaian minyak jelantah 6, 8 dan 10 kali pemakaian terhadap % rendemen pembentukan metil ester (biodiesel ) menggunakan katais basa homogen NaOH 0,6% massa. Seluruh sampel minyak jelantah direaksikan dengan methanol dengan perbandingan reaktan 1:5 % massa. Reaksi transesterrifkasi masing-masing sampel dilakukan pada suhu 60Â°C selama 40 menit. Hasil rendemen sampel minyak jelantah 6 kali pemakaian sebesar 96,6%, sedangkan 8 dan 10 kali pemakian menunjukkan nilai yang tidak jauh beda yaitu masing-masing 96,4 dan 96 % massa. Gas Chromatography (GC) dan Mass Spectrocopy (MS) mendeteksi 14 puncak senyawa dan bahwa 3 puncak tertinggi yang menunjukkan bahwa kandungan sampel adalah suatu metil ester. Masing-masing puncak garis 4 merupakan metil palmitat (C17H34O2) dengan luas area 36,66 %, puncak garis 6 adalah metil oleat (C19H36O2), luas area 55,7% dan waktu retensi 17.92 menit ; puncak garis 7 adalah metil nonadekanoat (C20H40O2) dengan luas area 4,41% dan waktu retensi 18,093 menit.

Analisa % FFA, PH dan Massa Jenis pada Campuran Minyak Jelantah dan Minyak Kelapa Ariyani Debora; Megawati Eka; Yuniarti
JURNAL TEKNOSAINS KODEPENA Vol. 4 No. 2 (2024): Jurnal Teknosains Kodepena Volume 4 Nomor 2 Januari 2024
Publisher : Kodepena (Komunitas Dosen Penulis dan Peneliti Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54423/jtk.v4i2.55

The increase in population and increasing human needs along with the times has resulted in an increasing need for non-renewable energy. To reduce dependence on petroleum fuels, one way is to produce biodiesel fuel whose raw materials are obtained from plants. Biodiesel is a fuel that contains ester compounds from plants and animal fats and can be used as an alternative fuel with great potential as a substitute for diesel. This form of methyl ester or ethyl ester compound is environmentally friendly, non-toxic and economical. Coconut (Cocos nucifera) is a type of plant that has one glycerin unit and a number of fatty acids in every coconut oil molecule. Coconut oil has the potential to produce Coco methyl ester which can be used as a raw material for biodiesel. Used cooking oil is used oil from household (domestic) fryers whose remaining frying results or waste is immediately thrown into the environment. According to research from Kumar, the use of coconut oil as a raw material for making biodiesel is able to streamline time and the use of chemicals as solvents in the transesterification process. Before carrying out this research, a preliminary test should be carried out, by testing the %FFA, pH and density of the mixture of used cooking oil and coconut oil. This was done as a reference for further research. The %FFA in the mixture of used cooking oil and coconut oil was the highest at a ratio of 75: 25 (MJ: MK) %FFA value: 4.4%. The pH of the mixture between used cooking oil and coconut oil has the same value, namely: 5 and the specific gravity obtained is: 0.8 gram/ml Keywords: of used cooking oil, coconut oil, % FFA, pH and Specific gravity

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