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All Journal Rotasi CHEMICA Jurnal Teknik Kimia Rekayasa Mesin Sinergi Jurnal Teknik Sipil Jurnal Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin Indonesian Journal of Chemistry Jurnal Pendidikan dan Konseling International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) International Journal of Community Service Jurnal Rekayasa Energi dan Mekanika JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) International Journal of Innovation in Mechanical Engineering and Advanced Materials Journal Of Carbazon

Sagir Alva

Universitas Mercu Buana

Author-ID : 635829

Religion Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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Development of Arduino Uno-Based TCS3200 Color Sensor and Its Application on the Determination of Rhodamine B Level in Syrup Muhammad Syukri Surbakti; Muhammad Farhan; Zakaria Zakaria; Muhammad Isa; Elly Sufriadi; Sagir Alva; Elin Yusibani; Leni Heliawati; Muhammad Iqhrammullah; Khairi Suhud
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69214

The use of the notorious synthetic dye, rhodamine B, in food and beverage products has been widely reported. This application urges the need to develop an analytical method that can provide reliable rhodamine B data with an easy operational technique. Therefore, this research is aimed to develop an Arduino Uno-based TCS3200 color sensor and study its application to determine rhodamine B levels in syrup. The design of the analytical instrument included TCS3200, an Arduino Uno microcomputer, an Integrated Development Environment (IDE) software, a black box container, and a 24 × 2 matrix display screen, where samples were prepared via absorption using wool thread. With a linear range of 1–20 mg/L, our proposed colorimetric sensor had recoveries of 96.25–110.3%, which was better compared to that was obtained from the UV-vis (81.8–100.6%) method. The detection and quantification limits of the sensor were 2.766 and 8.383 mg/L, respectively. The syrup samples used in this study were purchased from the local stores in Banda Aceh. Based on the proposed TCS3200 color sensor, the highest rhodamine B concentration from the syrup sample was 16.74 mg/L. The t-test analysis in this study revealed that the Rhodamine B levels quantified using the newly developed TCS3200 color sensor were not statistically or significantly different from the UV-Vis spectrophotometer method.

Analysis of Potassium Ion (K+), Sodium Ion (Na+), and Proteins from Coconut Water Variety of Coconut and Hybrid Coconut Sagir Alva
Journal of Chemical Natural Resources Vol. 3 No. 1 (2021): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Analysis of potassium ion (K+), sodium ion (Na+), and proteins of Dalam coconut varieties water and Hybrid coconut varieties water have been done. The sample is green coconut which was taken simple random from Deli Tua Barat village in the regency of Deli Tua. Analysis of potassium ion (K+) and sodium ion (Na+) was determined by Atomic Absorption Spectrophotometry method (AAS) and analysis of protein was determined by the Kjeldahl method. From the result analysis of Dalam coconut varieties water contain amount potassium ion 321.60 mg/100 mL + 0,77 mg/100 mL, sodium ion 33.17 mg/100 mL + 1.85 mg/100 mL, and protein 0,18 % + 0.05 %. Whereas Hybrid coconut varieties water contain amount potassium ion 278.67 mg/100 mL + 1.53 mg/100 mL, sodium ion 31.33 mg/100 mL + 0.83 mg/100 mL, and protein 0.48 % + 0.3 %.

ANALISIS SISTEM PENDINGIN MENGGUNAKAN THERMOSTAT DAN TANPA THERMOSTAT DALAM PENCAPAIAN PANAS MESIN PADA ALAT UJI PRESTASI Dafit Feriyanto; Sagir Alva; Resista Vikaliana; Asep Setia Kristanto
Jurnal Rekayasa Mesin Vol. 13 No. 3 (2022)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v13i3.757

The ideal working temperature of the engine is about 82 - 93 ⁰C. The engine cooling system is needed to reach and maintain the ideal working temperature of the engine. The engine cooling system is equipped with a thermostat to regulate the flow of cooling water to reach and maintain the temperature. A malfunctioning thermostat will disrupt the cooling system process that led the engine can be overheated. This study aims to analyze the cooling system with and without a thermostat to achieve the ideal working temperature and evaluate the heat distribution on the engine cooling system in the Hyundai Arya diesel engine type D4BB. The research was conducted by various rotations of 800 rpm, 1500 rpm, and 2500 rpm, and the data was collected every 10 minutes. The cooling system without a thermostat can not reach the ideal working temperature of the engine within 10 minutes. Meanwhile, with a thermostat, the ideal working temperature of the engine can be achieved in 9 minutes with an average engine temperature of 86.0 ⁰C at 800 rpm, in 6 minutes with an average engine temperature of 83.5 ⁰C at 1500 rpm, and within 4 minutes with an average engine temperature of 81.7 ⁰C at 2500 rpm. The heat released by the cooling system without a thermostat is less than using a thermostat, with an average of 55.7%. The engine cooling system with a thermostat in the engine cooling system and precise engine temperature control will make the ideal working temperature of the engine more quickly achieved and can be maintained as long as the engine is operated.

Karakteristik Mekanikal Material Polimer PVC dengan Variasi Konsentrasi Vco (Virgin Coconut Oil) Thasyah Pitanova; Sagir Alva
Jurnal Pendidikan dan Konseling (JPDK) Vol. 5 No. 1 (2023): Jurnal Pendidikan dan Konseling
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jpdk.v5i1.11711

Plastik merupakan sebuah material yang bersifat ringan, elastis dan praktis. Plastik mempunyai peranan besar bagi kehidupan sehari-hari manusia. Konsekuensi dari hal tersebut adalah jumlah plastik yang menumpuk dan membuat jumlah sampah plastik rumah tangga meningkat. Limbah plastik ini tidak hanya merusak ekosistem yang ada tetapi juga mengancam nyata bagi kelangsungan seluruh makhluk hidup karena daya hancur plastik yang sulit terdekomposisi. Oleh sebab itu diperlukan penanganan dan pengelolaan yang jelas untuk masalah sampah plastik ini. Salah satunya yaitu mengolah limbah plastik menjadi bahan komposit non struktur. Plastik Poly-vinly Chloride atau biasa disingkat PVC, adalah polimer termoplastik urutan ketiga dalam hal jumlah pemakaian di dunia, setelah polietilena dan polipropilena. PVC merupakan termoplastik ekonomis dan serbaguna yang lazim diaplikasikan pada industri konstruksi bangunan. untuk meningkatkan keuletan dan ketangguhan dari produk PVC, perlu ditambahkan plasticizer dengan kadar tertentu, namun tanpa menghilangkan sifat kekakuan dari PVC tersebut. Salah satu jenis plasticizer yang digunakan adalah Diocthyl Phthalate (DOP). Namun disisi lain DOP memiliki kekurangan dan dampak yang sangat berbahaya bagi tubuh manusia apabila dikonsumsi dalam jangka panjang. Solusi yang tepat adalah mencari bahan baku plasticizer pengganti DOP yang memiliki kandungan senyawa lebih alami dan tetap aman dikonsumsi tubuh. Plasticizer yang memiliki kandungan senyawa alami adalah VCO karena pembuatannya yang tanpa melakukan pemanasan dan berasal dari pengolahan daging buah kelapa itu sendiri. Penelitian ini akan melakukan suatu proses percampuran antara PVC dengan VCO dan ditambahkan dengan THF sebagai pelarut, dengan perbandingan antara PVC 400 mg, VCO 30%, 40%, 50%, 60% dan 70% dan THF 9ml dengan bentuk akhir berukuran 10 cm x 2 cm dan tebal 0,1 mm dan selajutkan dilakukan beberapa uji, seperti uji tarik atau tensile test ( regangan dan elastisitas ) dan uji bending ( kekuatan tekan dan elastisitas ) agar dapat mengetahui karakteristik serta sifat kimia baru agar dapat menjadi material yang dapat digunakan.

DEVELOPMENT AND CHARACTERIZATION OF SOLID CU / CUSO4 REFERENCE ELECTRODES Marysca Shintya Dewi; Sagir Alva; Wan Adil Wan Jamil
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 1 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

In this research, a solid Cu/CuSO4 reference electrode has been developed. In this development process, the Cu/CuSO4 solid reference electrode provided consists of two types, namely the Cu/CuSO4 I solid reference electrode (ERP Cu/CuSO4 I) and the Cu/CuSO4 II solid reference electrode (ERP Cu/CuSO4 II). ERP Cu/CuSO4 I was prepared using two layers, namely the Cu/CuSO4 layer and the cellulose acetate layer which were placed sequentially on the surface of the planar type Cu electrode. Meanwhile, ERP Cu/CuSO4 II was prepared using three layers, namely a layer of cotton fiber/cellulose acetate, a layer of Cu/CuSO4, and a layer of cotton/cellulose acetate placed in sequence on the surface of the planar type Cu electrode, where the CuSO4 layer is between the two layers of cotton/cellulose acetate. Both types of Cu/CuSO4 solid reference electrodes were characterized by testing DmV in various concentrations of KCl solution and ERP Cu/CuSO4 II has been produced as the best reference electrode for Cu/CuSO4 solids with a DmV value of 3.3 mV. Furthermore, ERP Cu/CuSO4 II was selected for characterization using cyclic voltammetry (CV) testing, response vs Cl sensor testing, and drif testing. In CV testing, ERP Cu/CuSO4 provides a voltammogram graph pattern similar to the Ag/AgCl reference electrode as a commercial reference electrode. Meanwhile, in testing the response vs sensor Cl, ERP Cu/CuSO4 II gave a Nernstian number value of -50.1 mV/decade with a test range of 0.1-10-3 M. ERP Cu/CuSO4 II showed fairly good stability, namely with a drift value of 0.46 mV/minute which is achieved after the conditioning process after 12 minutes.

Fabrication of mercury (Hg) sensor based on Tire Waste (TW) carbon electrode and voltammetry technique Baihaqi Baihaqi; Khairi Suhud; Sagir Alva; Eka Safitri; Julinawati Julinawati; Binawati Ginting; Syafrizal Fonna; Ahmad Kamal Arifin; Zulnazri Zulnazri; Nurul Islami
SINERGI Vol 27, No 3 (2023)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2023.3.012

Voltammetry is widely used to detect heavy metals such as mercury (Hg). The sensor material influences the results of the voltammetry method. Carbon-based sensors are commonly developed because of their wide potential range, low background current, inexpensive, inert, and suitable for various sensors. Recently, Tire Waste (TW) was chosen as a carbon source for the manufacture of electrodes because it is rich in carbon (88%). The material is easy to obtain, green technology and a carbon source that has not been properly utilized. Separation of carbon material from TW using the pyrolysis method produces 4.32 gr (2.6%) of soot (from 200 gr TW) as a material for making carbon-based Hg sensors. The XRD pattern of TW soot has amorphous phases. SEM topography shows that the surface of TW soot consists of particles that are almost uniform in shape. The estimated particle size is about 0.25 µm. The sensor was made with a mixture of TW soot and paraffin with a 2:1 ratio. Testing the specific value of sensor capacitance using the Cyclic Voltammetry (CV) method showed the presence of cathodic and anodic currents. The Hg deposit occurred at a peak cathodic current at a scan rate of 20 mV/s. The Limit of Detection (LoD) value is 0.0681 ppm and the Limit of Quantitation (LoQ) is 0.229 ppm. Measurement of Hg in natural water samples used river water from the Aceh Jaya sub-district at two points representing the upstream and downstream of the river. The Hg concentrations obtained were 0.000536 ppm and 0.00182 ppm, respectively and were compared with the inspection results using Atomic Absorbance Spectroscopy (AAS), 0.00058 ppm and 0.00186 ppm, respectively. The t-test results of the two Hg measurement methods at a significance level (α) of 5% obtained tcount > ttable (0.0208 <2.306), indicating that there is a significant difference between the two Hg concentration measurement methods for natural water.

PENGARUH SUMBER ARUS LISTRIK TERHADAP NILAI TINGKAT SUARA KLAKSON BERDASARKAN STANDAR PENGUJIAN UN ECE R28 PART II Basyari, Aziz; Alva, Sagir
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 1 (2024): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i1.3080

The growth of motorized vehicles in Indonesia reached 4.1% with a total number of vehicles of 136,137,451. Vehicle units operated on the highway will cause an increase in noise on the highway caused by the operation of vehicle horns. The Indonesian government has regulated horn noise quality standards through Peraturan Pemerintah Nomor 55 Tahun 2012. Indonesia has agreed to the Asean Mutual Recognation Agreement (MRA) for automotive product standards in the Asean region referring to UN ECE where for horn testing it refers to the UN ECE R28 Part II standard. From testing the horn at durations of 1, 5, 10 and 15 seconds using a battery and an idle engine, there was no significant difference in the resulting horn sound level. This research aims to ensure the source of electric current when testing the horn so that the test can run more effectively and efficiently by establishing in the operational standards the UN ECE R 28 Part II test procedure using a battery only

Use of Vegetable and Fruit Waste To Make Environmentally Friendly Liquid Fertilizer In The Growth of The Indonesian Community of Pinang G. Ayu Arwati, I; Suprihatiningsih, Wiwit; Alva, Sagir; Fitri, Muhammad; Hidayat, Imam; Hasibuan, Sawarni
International Journal Of Community Service Vol. 4 No. 2 (2024): May 2024 (Indonesia - Ethiopia )
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijcs.v4i2.272

This community service partner is the Non-Governmental Organization (NGO) PERMAI in Penang. PERMAI members are generally Indonesian workers who work in Penang, some of whom work as home-based food traders. Around where he lives, traders produce waste, including organic waste from cooking activities and leftovers from selling vegetables and fruit. This organic waste rots easily if left alone, causing an unpleasant odor in the surrounding area and causing a smelly and unhealthy environment. One way to handle organic waste, especially rotten fruit and vegetables produced from household or restaurant waste, is by making liquid fertilizer. The implementation method used is two stages, namely: 1) preparation stage; production originating from appropriate technological equipment activities for making liquid fertilizer, discussions and sharing with team members, and 2) the stage of implementing community service at partner locations, distributing questionnaires before and after the exposure. The expected target in this community service activity is to increase the knowledge of the Indonesian working community in Pulau Pinang regarding how to make and the benefits of liquid fertilizer which can be made from everyday household vegetable and fruit waste.

Analysis of Hg(II) Metal by Voltammetric Method Using a Carbon Electrode Modified with EDTA from Used Tire Waste Sukoma, Sukoma; Alva, Sagir; Safitri, Eka; Julinawati, Julinawati; Mustanir, Mustanir; Fonna, Syafrizal; Ihsan, Muhammad; Dara, Fitri; Dayanti, Meri; Arifin, Ahmad Kamal; Suhud, Khairi
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97561

Development of a carbon electrode sensor from used tire waste via pyrolysis, modified with ethylenediaminetetraacetic acid (EDTA) for mercury detection using the cyclic voltammetry (CV) method. EDTA plays a role in metal complexation due to its strong response to mercury metal. The FTIR results of the carbon electrode and EDTA show a C–N bond at a wavenumber of 1,217.08 cm−1, indicating the presence of EDTA. The SEM results reveal a clear difference between the unmodified carbon electrode and the EDTA-modified carbon electrode. The calibration graph is linear, with an R2 value of 0.9961, a sensitivity of 0.3472, as well as LoD and LoQ values of 0.03 and 0.08 ppm, respectively. The correlation coefficient is less than 2%, and the %recovery is within the allowable error range. Mercury measurements in Sungai Mas water samples, Aceh Barat, using voltammetry and AAS, exceed the threshold set by Indonesian Government Regulation (PPRI) No. 22 of 2021. The t-test results for the two Hg measurement methods at a 5% significance level (α) show that tcalculated < ttable (0.083 < 2.571). This indicates no significant difference between the voltammetry and AAS methods for measuring Hg concentrations in water.

Effect of Coconut Fiber and Coconut Shell Charcoal Composition on the Properties of PVC-Reinforced Composite Brake Pads Pandriana, Aap; Kurniawan, Kurniawan; Alva, Sagir
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 7, No 1 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v7i1.31092

The increasing concern over the health hazards associated with asbestos-based brake pads has driven the development of eco-friendly alternatives using natural fiber-reinforced composites. This study aims to fabricate and evaluate a sustainable brake pad material using coconut fiber as reinforcement, coconut shell charcoal powder as filler, and polyvinyl chloride (PVC) as the matrix. The composite was manufactured using the hot press method at a temperature of 180°C and a pressure of 7 MPa, conditions selected to optimize resin curing and interfacial bonding. A key focus of this research was to investigate the effect of solvent volume (cyclohexanone) used in the PVC resin preparation on the mechanical properties of the resulting composites. Three composite formulations were prepared with a constant composition of 70% coconut fiber, 5% charcoal powder, and 25% PVC resin, but with varying amounts of cyclohexanone solvent (200 mL, 150 mL, and 100 mL). The results revealed that reducing solvent content led to higher resin viscosity, which improved matrix–fiber bonding and increased both tensile strength and surface hardness. The optimal formulation—PVC Resin 3 with 100 mL of solvent—achieved a maximum tensile strength of 7.7 MPa and Shore D hardness of 72.2 HD, both of which meet the SAE J661-1997 standards for brake pad materials. This study confirms that solvent content is a critical factor influencing the density, strength, and durability of the composite. The findings support the feasibility of utilizing coconut-based agricultural waste in producing environmentally friendly brake pads with adequate mechanical performance.

Co-Authors Adelfy Dara Arianti Agnes Hanna Patty, Armin Naibaho, Singgih Fitra Utama, Ahmad Ariri Ahmad Kamal Arifin Aiman Sajidah Abd Aziz Aiman Sajidah binti Abdul Aziz Albert Phak Jie Wong Ali Rinaldi Andi Firdaus Sudarma Arianti, Adelfy Dara Arifin, Ahmad Kamal Ariri, Ahmad Asadullah, Mas'ud Asadullah, Masud Asep Setia Kristanto Ayu Arwati, I G. Baihaqi Baihaqi Basyari, Aziz Binawati Ginting Dafit Feriyanto Dayanti, Meri Deni Shidqi Khaerudini Edy Herianto Majlan Eka Safitri Eka Safitri Elin Yusibani Elly Sufriadi Fadhilla, Eky Nur Fidi Fidi Fidi, Fidi Fitri , Muhammad Fitri Dara Fonna, Syafrizal Friliandita, Vivi G. Ayu Arwati, I Ginting, Dianta Hadi Pranoto Hadi Pranoto Hasbullah, Siti Aishah I Gusti Ayu Arwati Ibdal Satar Indradewa, Rhian Iqhrammullah, Muhammad Julinawati Julinawati Julinawati, Julinawati Khairi Suhud KHAIRI SUHUD Kurniawan Kurniawan Leni Heliawati Marysca Shintya Dewi Mas'ud Asadullah Mohd Ismahadi bin Syono Muhammad Farhan Muhammad Fitri, Muhammad Muhammad Ihsan Muhammad Isa Mustanir Mustanir Nanang Ruhyat Noviyanto, Alfian Noviyanto, Alvian Nurato , Nurato Nurul Islami, Nurul Pandriana, Aap Popy Yuliarty Pudjiwati, Sri Resista Vikaliana Resmi Bestari Muin Rinaldi, Ali Rini Anggraini Rita Sundari Robi Suherman Rohadi Satrio Budi Utomo Sawarni Hasibuan Siti Aishah Hasbullah Subekti Subekti Sudarma, Andi Firdaus Suhud, Khairi Sukoma, Sukoma Sundari, Rita Supaat Zakaria Surbakti, Muhammad Syukri Suyadi, Yadi Swandya Eka Pratiwi, Swandya Eka Syafrizal Fonna Tarigan, Kontan Teddy Kurniawan Thasyah Pitanova Vivi Friliandita Wahyu Irwansyah Wahyudi, Haris Wan Adil bin Wan Jamil Wan Adil Wan Jamil Winnugroho Wiratman, Manfaluthy Hakim, Tiara Aninditha, Aru W. Sudoyo, Joedo Prihartono Wiwit Suprihatiningsih Zakaria Zakaria Zulnazri, Z

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