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Daniel -, Daniel
Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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PHYTOCHEMICAL TEST AND TOXICITY (Brine Shrimp Lethality Test) IN ETHANOL EXTRACT, ETHYL ACETATE FRACTION AND RESIDUAL ETHANOL FRACTION OF AJERAN LEAVES (Bidens pilosa L.) Audia, Nuraini Meti; -, Daniel; Marliana, Eva
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Phytochemical test and toxicity in ethanol extract, ethyl acetate fraction and residual ethanol fraction of ajeran leaves (Bidens pilosa L.) has been done. The method used to determine secondary metabolites is clualitative test and the value of Lethal Concentration (LC50) with the Brine Shrimp Lethality Test (BSLT). Phytochemical test results showed that the ethanol extract and ethyl acetate fraction contained flavonoid, steroid and phenol compound. Residual ethanol fraction contained flavonoid and phenol compound. Toxicity test showed ethanol extract had LC50 value of 862.19 ppm. Ethyl acetate fraction has LC50 value of 8.26 ppm. Residual ethanol fraction had LC50 value of 275.24 ppm. The results of the toxicity test can be concluded that the ethyl acetate fraction very toxic category, ethanol extract and residual ethanol fraction included toxic category. The results that obtained from GC-MS characterization were steroid
SYNTHESIS OF ETHYLENEDIAMIDE FROM METHYL ESTER OIL ARABICA COFFEE SEEDS (Coffea arabica. L) WITH ETHYLENEDIAMINE USING NaOCH3 CATALYST BY AMIDATION REACTION Maimunah, Siti; -, Daniel; Saleh, Chairul
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Synthesis of ethylenediamide surfactant from coffee bean oil methyl ester (Coffea arabica. L) through an amidation reaction. The synthesis process that has been carried out includes extraction, esterification and amidation of coffee bean oil content by soxhletation of 15.47% with acid number 3.15 mg KOH/g and ALB 1.58%. Coffee bean oil is converted to methyl ester through esterification and acid number is 1.50 mg KOH/g ALB level drops to 0.75% saponification number of 57.11 mg KOH / g. The most dominant composition of the coffee bean oil methyl ester based on GC-MS analysis was 48.0% methyl oleate. The FT-IR spectrum of methyl ester gives a specific absorption peak C = O ester at wave number 1745 cm-1. Methyl esters are converted to ethylenediamide through an amidation process. The resulting ethylenediamide has an acid number of 9.1 mg KOH/g and a saponification number of 3.39 mg KOH/g. The FT-IR spectrum provides specific absorption peaks for groups C=O at wave number 1639 cm1 and C-N at wave number 3302 cm-1. Ethylenediamide HLB values ​​are practically 12.5495 which includes oil in water (O/W) emulsifier surfactants.
KARAKTERISASI BIOIDIESEL LEMAK IKAN BAUNG (MYTUS NEMURUS) DENGAN KATALIS CaO DARI CANGKANG TELUR AYAM Pali, Mendriyani; -, Alimuddin; -, Daniel
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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The research abaout the use ash of eggchell as source of base catalyst in application for reaction of transseterification from fish baung fat. Conten of base compound in eggchell ash was analyzed by AAS and acidy alkalimetry. The result of the research showed that calcium concentration as carbonat calcium salt in the as of eggchell was 74,8% (w/w). weight variation on the eggchell as catalyst transeterification process is performed to find the optimum reqaction condition if the biodiesel production. Aqquisition of the highest biodiesel yield at catalyst weight of 2,5 % was 96.7663 %. The composition of fatty acid of fish baung fat from transesterification result it is determinate with FT-IR and GC-MS. GC-MS analysis showed that fatty acids are the dominant constituent in the biodiesel is methyl oleate in the amount of 39,39%.
SINTESIS ASKORBIL PALMITAT DARI METIL PALMITAT DAN ASETIL ASKORBAT MELALUI REAKSI INTERESTERIFIKASI DENGAN KATALIS LIPASE DAN UJI AKTIVITAS ANTIOKSIDAN DENGAN METODE 2,2-diphenyl-1-picrylhidrazyl (DPPH) Nisak, Khoirun; -, Daniel; Saleh, Chairul
JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Synthesis of ascorbyl palmitate from methyl palmitate and acetyl ascorbate through interesterification reaction has been done. Modified were done to improve the nature of ascorbic acid that only soluble in water (lipophobic) become soluble in oil or fat (lipophylic). The interesterification reaction conducted with molar ratio 1:4 (methyl palmitate:acetyl ascorbate), lipase from coconut as a catalyst with amount 70 % from its substrat, pH 7, the temperature reaction 40-50 °C and the reaction time is 48 hours so the yield produce is 46,7241 %. Characterization of the functional group were confirmed with FT-IR. Analysis of antioxidant activity using radical reduction method 2,2-diphenyl-1-picrylhidrazyl (DPPH) result the antioxidant activity value of ascorbyl palmitate is 45,41 ppm. The result showing that ascorbyl palmitate synthesized is have a potency as an active antioxidant.
PHYTOCHEMICAL AND ANTIOXIDANT ACTIVITY TESTS OF n-HEXANE, ETHYL ACETATE, AND ETHANOL FRACTIONS FROM SURUHAN (Peperomia pellucida (L.) Kunth) USING DPPH METHOD Lembang, Darmita Tiku; -, Daniel; Saleh, Chairul
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Uji fitokimia dan uji aktivitas antioksidan dari tumbuhan suruhan (Peperomia pellucida (L.) Kunth) menggunakan metode DPPH telah dilakukan. Hasil dari uji fitokimia pada tumbuhan suruhan (Peperomia pellucida (L.) Kunth) ekstrak kasar bernilai positif pada alkaloid, triterpenoid, steroid dan fenolik, pada fraksi n-heksana bernilai positif pada steroid, pada fraksi etil asetat bernilai positif pada alkaloid, triterpenoid, steroid dan fenolik, pada fraksi etanol sisa bernilai positif pada alkaloid, triterpenoid, saponin dan fenolik. Berdasarkan hasil uji antioksidan dengan metode DPPH (1,1-diphenyl-2-picrylhidrazyl) menunjukkan pada ekstrak kasar, fraksi n-heksana, fraksi etil asetat dan fraksi etanol sisa memiliki nilai IC50 masing-masing sebesar 151,17; 390,87; 159,617 dan 93,886 ppm. Tingkat aktivitas antioksidan paling tinggi adalah pada fraksi etanol sisa. Hasil karakterisasi dengan GC-MS diperoleh 15 senyawa.
PHYTOCHEMICAL TEST AND ANTIOXIDANT ACTIVITY TEST OF n-HEXANE FRACTION EXTRACT, ETHYL ACETATE AND REMAINED ETHANOL FROM LEAF OF SUNGKAI (Peronema canescens Jack.) USING DPPH METHOD Pindan, Neli Peni; -, Daniel; Saleh, Chairul; Magdaleni, Agustina Rahayu
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Research on phytochemical test and antioxidant activity on sungkai leaf extract (Peronema Canescens Jack.) using DPPH (1,1-diphenyl-2-picrylhydrazyl). Phytochemical test result showed that secondary metabolites in crude extracts were alkaloids, flavonoids, phenolics, triterpenoids, steroids and saponins, secondary metabolites in n-hexane were flavonoids, triterpenoids and steroids, secondary metabolites ethyl acetate were alkaloids, triterpenoids and steroids and secondary metabolites in residual ethanol is alkaloids, flavonoids, phenolics and steroids. The IC50 values obtained in each crude extract, n-hexane, ethyl acetate and ethanol residue respectively: 29.549 ppm; 607.475 ppm; 12.986 ppm; 15.766 ppm. The highest level of antioxidant activity is in ethyl acetate fractions. Charaterization results with GC-MS obtained by alkanes, alkenes, alcohols and fatty acids.
PEMANFAATAN BONGGOL PISANG KEPOK (Musa paradisiaca. L) SEBAGAI BAHAN PEMBUATAN PLASTIK YANG MUDAH TERDEGRADASI DENGAN PENAMBAHAN PLASTICIZER GLISEROL. Pratiwi, Ricka Indria; Saleh, Chairul; -, Daniel
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Telah dilakukan penelitian pembuatan plastik yang mudah terdegradasi menggunakan pati dari bonggol pisang kepok (Musa paradisiaca. L) dengan penambahan plasticizer gliserol. Metode yang digunakan adalah proses blending secara fisika. Hasil menunjukkan bahwa konsentrasi gliserol untuk menghasilkan plastik yang mudah terdegradasi paling baik adalah pada variasi volume gliserol 4 mL dengan nilai ketahanan air sebesar 62,23 % dan nilai degradabilitas sebesar 93,45 %.
SINTESIS DAN KARAKTERISASI NANOPARTIKEL PERAK TERMODIFIKASI GLUTATHIONE MENGGUNAKAN REDUKTOR NaBH4 Aditya, Adrian Maulana; -, Daniel; Hindryawati, Noor
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1549

Abstract

Silver nanoparticles (AgNPs) possess remarkable properties that make them suitable for various applications in biomedical, environmental, and catalytic fields. This study focuses on the synthesis and characterization of glutathione-modified silver nanoparticles (AgNPs-GSH) using sodium borohydride (NaBH₄) as a reducing agent. The reduction of AgNO₃ by NaBH₄ produces elemental silver nanoparticles, as indicated by a color change to bright yellow due to the localized surface plasmon resonance (LSPR) phenomenon. The synthesized nanoparticles were stabilized using glutathione (GSH), which binds through thiol (-SH), amine (-NH₂), and carboxyl (-COOH) functional groups, enhancing the stability and biocompatibility of the AgNPs. UV-Vis spectroscopic analysis revealed a maximum absorbance at 408 nm, consistent with the optical properties of silver nanoparticles. Furthermore, particle size analysis indicated an average nanoparticle size of 1.271 nm, with some degree of agglomeration. These findings suggest the successful synthesis and functionalization of AgNPs-GSH with potential applications in nanobiotechnology.
PENURUNAN KADAR ASAM LEMAK BEBAS PADA MINYAK JELANTAH DENGAN MENGGUNAKAN ABU KALSINASI DARI BEBERAPA BAHAN ADSORBEN Hadyanto, Rafi Firmana; Purba, Ritson; -, Daniel; Rizki, Ade Shiva
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1563

Abstract

Cooking oil has a primary function as a heat transfer medium in food processing. Repeated use of cooking oil can reduce its quality, which is often referred to as used cooking oil. Many people use cooking oil repeatedly to save money without considering the impact. The purpose of this study was to determine the results of refining used cooking oil in terms of free fatty acid (FFA) levels through the adsorption method using calcined ash from several different types of adsorbents, namely chicken eggshells, Tegillarca granosa shells, zeolite, and bricks. Based on the results of the study, the results of the FFA content of the used cooking oil sample were 2.735%. The results of the FFA content of the used cooking oil sample after being adsorbed using calcined ash from chicken eggshells, blood cockle shells, zeolite, and bricks were 0.638%, 0.464%, 1.691%, and 0.921%, respectively. Of the four adsorbent materials, the type of adsorbent obtained is calcined blood cockle shell ash which is the most effective in reducing the ALB levels of used cooking oil samples, which is 83.03%. Then followed by chicken egg shells, which is 76.67%, bricks, which is 66.32%, and commercial zeolite, which is 38.17%.
Co-Authors Aditya, Adrian Maulana Alimuddin - Audia, Nuraini Meti Chairul Saleh Eva Marliana, Eva Hadyanto, Rafi Firmana KHOIRUN NISAK Lembang, Darmita Tiku Magdaleni, Agustina Rahayu Noor Hindryawati, Noor Pali, Mendriyani Pindan, Neli Peni Pratiwi, Ricka Indria Ritson Purba, Ritson Rizki, Ade Shiva Siti Maimunah Ulfa Mutia, Ulfa