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All Journal Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Prosiding Semnastek KOVALEN: Jurnal Riset Kimia Chimica et Natura Acta FLUIDA Indonesian Journal of Chemical Analysis (IJCA) J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Fullerene Journal of Chemistry Equilibrium Journal of Chemical Engineering REACTOR : Journal of Research On Chemistry And Engineering Industrial Research Workshop and National Seminar
Mentik Hulupi
Jurusan Teknik Kimia, Politeknik Negeri Bandung
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Other

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Validasi Metode Analisis Iodin Secara Spektrofotometri UV-Vis pada Dua Variasi Pelarut: Validation of The Method of Iodin Analysis by Uv-Vis Spectrofotometry with Two Variations of Solution Abdilah, Fauzi; Karina Aulia Rahmawati; Widya Tresna Dewi; Keryanti; Hulupi, Mentik
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 3 (2023): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i3.16448

Abstract

In this study, the method of analysis of iodine by UV-Vis spectrophotometry was validated. Two other solvents, ethanol, and cyclohexane were used to validate this approach. The UV-Vis Spectrophotometer method's linearity, detection, and quantization limitations, precision, and accuracy were investigated as variables. The results of the linearity tests indicated that the method was proportionally verified because the r values for the two iodine solutions in ethanol and cyclohexane varied between 0.990 and 0.999, respectively. This suggests that the values were higher than 0.99. The LOD values for the ethanol solvent were 4.441 mg/kg and the LOQ was 14.802 mg/kg, whereas the cyclohexane solvent had an LOD value of 2.660 mg/kg and the LOQ was 8.866 mg/kg. According to the required precision acceptance, the %RSD value of 2%, precision values for both standard iodine solutions with two modifications of solvents demonstrated good results. Recovery percentages of ethanol solvents are 96% and cyclohexane solvents are 86%, respectively, according to accuracy measurements. The combined uncertainty value for this test is 0.109 for the ethanol solvent and 0.019 for the cyclohexane solvent, respectively. This research provides a comprehensive understanding of the validity of the iodine analysis method, establishing a robust foundation for the sustainability and reliability of using UV-Vis spectrophotometer in the analysis
EM4 Effect on Macronutrients and Microbial Growth in Liquid Organic Fertilizer from Cibogo Market Waste Widyabudiningsih, Dewi; Rinaldi, Kardian; Firdaus, Fachrel Muhammad; Fauzi, Rafli Rizki; Hulupi, Mentik
Fluida Vol. 18 No. 1 (2025): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v18i1.6050

Abstract

Waste represents a major environmental concern due to its contribution to pollution. According to the Ministry of Environment and Forestry, organic waste comprised 51.63% of total waste in Indonesia. This highlights the potential for converting organic waste into liquid organic fertilizer (LOF) through anaerobic fermentation. This study aimed to determine the relationship between macronutrient content and microbial growth in LOF and to determine the optimum fermentation time for producing LOF. LOF was made using organic waste from Cibogo market, including green vegetable waste and fruit peels banana, mango, and pineapple). The research was conducted using reactor which contained 5 kg of green vegetable waste and 5 kg of fruit peels, supplemented with EM4 bioactivator (200, 250, and 300 mL), water, and brown sugar. Samples were analyzed on days 0, 7, 14, 21, and 28. Chemical parameters measured included nitrogen, phosphorus, C-organic, and potassium content, and microbial analysis was conducted to determine the role of microorganisms in the fermentation process. Results showed that the optimal fermentation time for LOF production was seven days, corresponding to the peak concentrations of NPK and C-organic. However, further optimization of EM4 volume and the ratio between waste and bioactivator is required, since the nutrient levels remain below the recommended standard. Moreover, the correlation between microbial population and nutrient availability requires further research, particularly with respect to the quantity of EM4 applied.
Sintesis Zn-BDC dengan Metode Sonokimia dan Aplikasinya Pada Proses Adsorpsi Ion Logam Pb2+ Abdilah, Fauzi; Hulupi, Mentik; Keryanti, Keryanti; Nabilah, Nida; Nabilah, Tiana Hasana
REACTOR: Journal of Research on Chemistry and Engineering Vol. 3 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/

Abstract

The heavy metal ion pollution such as lead (Pb2+) in wastewater is an environmental problem that needs to be solved. The adsorption method has been reported to have good potential as an alternative method for reducing heavy metal contents in aquatic environment. The most widely used adsorbent media are porous materials with a large surface area and low density. Metal Organic Frameworks (MOFs) are a type of porous material that is widely applied in various fields, such as fuel purification, solvent recovery, gas storage, and adsorbents. Lead (II) is a heavy metal ion that can pollute the environment and endanger humans. This study aims to synthesize MOFs and apply it to the Pb2+ adsorption process. In this research, MOFs type Zn-BDC or MOF-5 were synthesized by sonochemistry method at 60 ℃ as adsorbent for Pb2+ ion. Characterization of the adsorbent by FTIR showed the presence of functional groups C=O, C-H, and Zn-O which indicated the formation of the MOF-5 compound. The concentrations of Pb2+ ions were analyzed using Atomic Absorption Spectrophotometer (AAS). The experimental results show the optimum conditions for the adsorption process at pH 5 for 60 minutes with adsorption efficiency reaching 93.41%. Testing the adsorption isotherm model showed that the Pb2+ ion adsorption process using Zn-BDC as an adsorbent followed the Langmuir isotherm model with the R2 value of 0.9986.
Formulasi dan Evaluasi Sabun Cair Pencuci Tangan melalui Pemanfaatan Ekstrak Etanol Kopi Robusta sebagai Antibakteri Abdulloh, Harris; Azzahra, Nasya; Abdulloh, Sudrajat Harris; Hulupi, Mentik
Prosiding Industrial Research Workshop and National Seminar Vol. 16 No. 1 (2025): Vol. 16 No. 1 (2025): Prosiding 16th Industrial Research Workshop and National
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v16i1.6678

Abstract

Penularan bakteri melalui tangan merupakan salah satu jalur utama penyebaran penyakit, sehingga diperlukan inovasi sabun cuci tangan yang tidak hanya membersihkan, tetapi juga bersifat antibakteri. Penelitian ini bertujuan untuk memanfaatkan ekstrak etanol kopi robusta sebagai zat antibakteri pada formulasi sabun cuci tangan terhadap pertumbuhan bakteri Staphylococcus aureus dan Escherichia coli yang sering ditularkan melalui tangan. Sabun diformulasikan dengan penambahan konsentrasi ekstrak 0%, 2%, 4%, dan 6%. Parameter pengujian sediaan sabun meliputi uji berdasarkan SNI-2588-2017 yaitu uji pH, total bahan aktif, bahan tidak larut etanol, alkali bebas, serta tambahan uji viskositas, tinggi busa, stabilitas, dan uji antibakteri. Hasil menunjukkan formulasi sabun dengan penambahan ekstrak etanol kopi robusta belum memenuhi SNI-2588-2017 karena nilai alkali bebas dan bahan tidak larut etanol melebihi batas yang ditentukan. Tetapi ekstrak etanol kopi robusta pada sabun memberikan aktivitas antibakteri terhadap bakteri Staphylococcus aureus dan Escherichia coli dengan kategori kuat dengan aktivitas antibakteri terbaik pada konsentrasi 6%.
Ekstrak Etanol Daun Binahong (Anredera cordifolia) sebagai Zat Aktif Antibakteri terhadap Staphylococcus aureus dan Pseudomonas aeruginosa dalam Sabun Mandi Cair Utami, Naila Rahma; Ardiantina, Tiana; Abdulloh, Sudrajat Harris; Hulupi, Mentik
Prosiding Industrial Research Workshop and National Seminar Vol. 16 No. 1 (2025): Vol. 16 No. 1 (2025): Prosiding 16th Industrial Research Workshop and National
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v16i1.6679

Abstract

Sediaan yang bermanfaat membersihkan tubuh dan mengandung berbagai senyawa yang berperan sebagai antibakteri, seperti flavonoid, tanin, dan saponin adalah sabun mandi cair ekstrak daun binahong. Penelitian bertujuan untuk memformulasikan, menganalisis pengaruh, dan menentukan konsentrasi optimum penambahan ekstrak daun binahong pada pembuatan sabun mandi cair. Variasi ekstrak daun binahong dibuat sebesar 4%, 8%, dan 12% menggunakan pelarut etanol 96%, rasio 1:10 (b/v), dan maserasi selama 3 × 24 jam. Uji antibakteri menggunakan metode cakram difusi agar yang menghasilkan zona hambat berturut turut 9,5 mm; 13 mm; dan 12 mm untuk S. aureus; serta 9 mm; 11,5 mm; dan 10 mm untuk P. aeruginosa. Karakterisasi sesuai dengan SNI 4085-2017, pH bernilai 8,0 – 8,9; alkali bebas 0,03 – 0,19%; dan total bahan aktif 24,39 – 35,32%. Uji organoleptik sampel berwarna hijau, kental, lembut, dan beraroma parfum sedikit aroma ekstrak. Viskositas bernilai 342 – 707,7 cPs; massa jenis bernilai 1,058 – 1,099 g/ml; dan stabilitas busa bernilai 36 – 53,5 mm. Penelitian membuktikan sabun mandi cair ekstrak daun binahong memberikan efek antibakteri dengan konsentrasi optimum penambahan esktrak 8% terhadap S. aureus dan P. aeruginosa. Sabun memenuhi syarat sediaan fisik dan SNI 4085-2017, tetapi pengujian viskositas penambahan ekstrak 8% serta pengujian alkali bebas penambahan esktrak 8% dan 12% tidak memenuhi standar.
Sintesis dan Karakterisasi SiO2@C dari Sekam Padi Sebagai Anoda Baterai Litium: - Suryadi, Joko; Andrijanto, Eko; Hulupi, Mentik; Salsabilla, Shafira; Hanifah, Hani
Fluida Vol. 18 No. 2 (2025): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v18i2.6560

Abstract

The rapid development of technology systems today has triggered a demand for battery development as energy storage. Utilizing the abundant biomass in Indonesia can meet commercial demands, one of which is rice husk. Rice husk is the protective layer that encases rice grains, containing holocellulose (55%), lignin (20%), SiO2 (20%), and minerals (5%), and has the potential to be used as a precursor for silica and carbon to create SiO2@C nanocomposites. In this study, SiO2@C composites were synthesized as lithium battery anode materials from rice husk using a calcination method and the addition of NaOH to form a porous morphology. The calcination process was carried out at 800℃ for 1 hour with a mass ratio of SP-C (Rice Husk Carbonization) and NaOH (1:1, 1:2, and 1:3). The synthesized SiO2@C composites exhibited a porous morphology within the mesopore size range of 13,94 nm at a 1:1 ratio and contained Si 2,42%, O 9,72%, and 87,86%. The mass ratio of NaOH addition can influence the surface area of the SiO2@C composites, with yields of 392,00 m2/g for 1:1 ratio, 1023,04 m2/g for the 1:2 ratio, and 1756,63 m2/g for the 1:3 ratio.
Co-Authors Abdilah, Fauzi Abdulloh, Harris Ade Suherman Andrijanto, Eko Ardiantina, Tiana Azzahra, Nasya Badra Sanditya Rattyananda Dessy Cartika Duyeh Setiawan Fauzi Abdilah Fauzi, Rafli Rizki Firdaus, Fachrel Muhammad Hanifah, Hani Haryadi, Haryadi Iswahyudi Iswahyudi Karina Aulia Rahmawati Karina Aulia Rahmawati Keryanti, Keryanti Lili Indrawati Muhamad Basit Febrian Nabila Sofiyani Nabilah, Nida Nabilah, Tiana Hasana Nancy Siti Djenar Ngatin, Agustinus Nida Nabilah Retno Indarti Rinaldi, Kardian Riniati Rizka Amalia Nuriana Salsabilla, Shafira Shalihatunnisa Shalihatunnisa Siti Fauziah Sudrajat Harris Abdulloh Suryadi, Joko Tiana Hasna Nabilah Titin Sri Mulyati Troskialina, Lina Utami, Naila Rahma Widya Tresna Dewi Widya Tresna Dewi Widyabudiningsih, Dewi Winda Putri Silpia Yusuf Sofyan