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ALCHEMY Jurnal Penelitian Kimia
Published by Universitas Sebelas Maret
ISSN : 14124092     EISSN : 24434183     DOI : -
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology
ALCHEMY Jurnal Penelitian Kimia is a chemistry journal published by Sebelas Maret University, Surakarta. ALCHEMY Jurnal Penelitian Kimia publishes original research articles or review articles in organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry, and environmental chemistry.
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Articles 14 Documents
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Search results for , issue "Vol 20, No 1 (2024): March" : 14 Documents clear
Kinetics and Thermodynamics Equilibrium of Nickel Metal Ions Sorption onto Carbon Nanofibers Irradiated by Ultrasonic Energy Alimin Alimin; La Ode Ahmad Nur Ramadhan; La Ode Ahmad; Fahmiati Fahmiati; Darwin Ismail; Ahmad Zaeni; Muhammad Zakir Muzakkar; Intan Intan; La Agusu; Indriana Kartini; Sri Juari Santosa
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.74223.22-30

Abstract

In this work, we investigated the effects of the heavy metal initial concentration and the pH on the sorption of heavy metal ions onto carbon nanofibers using the liquid phase adsorption technique under ultrasonic energy irradiation. These data were then used to study thermodynamic aspects such as sorption capacity and energy and kinetic parameters such as kinetic model, reaction order, and rate constant of heavy metal sorption on carbon nanofibers. We found that the increase of the heavy metal (nickel) initial concentration was proportional to the amount of heavy metal adsorbed onto carbon nanofibers. The highest uptake of the heavy metal ions' amount onto carbon nanofibers in equilibrium (qe) was 244.00 mg.g-1, achieved at the pH of 8. Langmuir and Freundlich's isotherms were used to find the best-fitted isotherms model. The Langmuir isotherm best fits the sorption equilibrium of the heavy metal ions on Carbon nanofibers. Bothipseudo-first and pseudo-second orders studied the sorption and kinetic parameters of heavy metals on carbon nanofibers. The sorption kinetics model was fitted to the pseudo second-order. Based on the value of Gibbs free energy, the metal ions' sorption onto carbon nanofibers occurs spontaneously.
Sintesis Kopoli(Anetol-Stearil Akrilat-Divinilbenzena) sebagai Material Alternatif Adsorben Desi Suci Handayani; Edi Pramono; Bagus Indra Suwaji
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.77588.82-97

Abstract

Sintesis kopoli(Anetol-Stearil Akrilat-Divinilbenzena) atau KASA-DVB berhasil dilakukan melalui reaksi kopolimerisasi kationik menggunakan inisiator BF3O(C2H5)2 dan Stearil Akrilat (SA) dengan variasi 2, 4, dan 6 (b/b), pada jumlah anetol dan DVB tetap. Produk yang dihasilkan dikarakterisasi gugus fungsi, struktur, morfologi, viskositas intrinsik dan sifat termalnya berturut-turut menggunakan spektroskopi Fourier-transform infrared (FT-IR), proton nuclear magnetic resonance (1H-NMR), scanning electron microscopy dengan energy dispersive X-ray (SEM-EDX), viskometer Ostwald dan analisis thermogravimetric-differential thermal-differential scanning calorimetry (TG/DTA-DSC). Uji kinerja adsorpsi senyawa dilakukan dengan metode batch dan konsentrasi adsorbat ditentukan dengan Spektrofotometer UV-Vis. Data FT-IR menunjukkan hilangnya serapan gugus alil dan vinil sementara data 1H-NMR menunjukkan hilangnya H-alil dan H-vinil yang mengindikasikan KASA-DVB berhasil disintesis. Penambahan konsentrasi SA dapat meningkatkan nilai viskositas intrinsik. Analisis morfologi KASA-DVB diperoleh padatan dengan permukaan yang relatif kasar dan jumlah rongga semakin sedikit. Analisis termogram TG/DTA-DSC menunjukkan penurunan sifat termal yaitu diperoleh titik inisiasi degradasi massa yang lebih rendah. Nilai kapasitas adsorpsi tertinggi diperoleh dari hasil uji kinerja adsorpsi pada waktu kontak ke-60 menit dan variasi berat SA 2%. Berdasarkan data kinerja adsorpsi, menunjukkan bahwa KASA-DVB memiliki potensi sebagai adsorben. Uji adsorpsi menunjukkan kapasitas adsorpsi terbesar adalah 23,22 (mg/g) pada KASA-DVB 2%. Synthesis of Copoly(Anethol-Styryl Acrylate-Divinylbenzene) as an Alternative Adsorbent Material. Synthesis of copoly(Anethole-Stearyl Acrylate-Divinylbenzene) or KASA-DVB was successfully carried out by a cationic copolymerization reaction using BF3O(C2H5)2 initiator and various concentrations of Stearyl Acrylate (SA) are 2, 4, and 6 wt. The resulting products were characterized by functional groups, structure, morphology, intrinsic viscosity, and thermal properties using Fourier-transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance spectroscopy (1H-NMR), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), Ostwald Viscometer, and thermogravimetric-differential thermal-differential scanning calorimetry analysis (TG/DTA-DSC), respectively. The adsorption performance was analyzed using the batch method, and the adsorbate concentration was determined using a UV-Vis spectrophotometer. The FT-IR data showed loss of allyl and vinyl groups absorption, while 1H-NMR data showed loss of H-allyl and H-vinyl, indicating that KASA-DVB was successfully synthesized. The increase in SA concentration can increase the intrinsic viscosity value. Morphological analysis of KASA-DVB obtained solid materials with a relatively rough surface and fewer cavities. Thermogram analysis of TG/DTA-DSC showed a decrease in thermal properties, which was a lower mass degradation initiation point. The highest adsorption capacity was obtained from the adsorption performance with a contact time of 60 minutes and 2% SA weight variation. The adsorption performance data shows that KASA-DVB is potent as an adsorbent. The adsorption showed that the largest adsorption capacity was 23.22 (mg/g) on KASA-DVB 2%.
Combination of Andisol Soil-Bioball-Bacillus sp. For Cadmium Removal Application Ratna Tri Widyawati; Pranoto Pranoto; Edi Pramono
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.77891.130-137

Abstract

Industrial growth in Indonesia, especially the metal industry, has the potential to produce waste that can pollute the environment and hurt humans, animals, and plants. One of these pollutants is heavy metal cadmium (Cd). Besides that, cadmium is very toxic and will cause serious illness for humans. Bacillus sp. is a potential bacterium that can remove harmful substances so that it can be used for bioremediation. However, the ability of Bacillus sp. to absorb cadmium has not been reported. The research aims to study the effectiveness of optimal pH conditions in absorbing heavy metal cadmium. An adsorbent with composition andisol soil: bioball: Bacillus sp. 2:0:0; 1.5:1:4.3×105; 1:2:8.2×105; 0.5:3:1.21×106; and 0:4:1.58×106 (gr:piece:(cell/mL)) put into a beaker containing 100 mL of 6 ppm Cd solution with various pH 1, 2, 3, 4, 5, and 6. The aerator was added at a constant speed for 60 minutes. After 60 minutes, the Cd content was analyzed using Atomic Absorption Spectroscopy (AAS). The combination of andisol, bioball, and Bacillus sp. can absorb cadmium at the optimum conditions of pH 5, with composition andisol: Bioball soil: Bacillus sp. 1.5:1:4.3×105 (g:piece:(cell/mL)), and contact time of 120 minutes with total removal of 75.6%.
Synthesis of Graphene from Pencils Graphite Via Electrochemical Exfoliation Method as a Cu-Foil Coating on the Anode-Free Lithium-Ion Battery Neka Nur Aida; Muhammad Ikhsanudin; Anif Jamaludin; Anafi Nur'aini; Eka Lutfi Septiani; Hendri Widiyandari
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.74620.31-37

Abstract

The Anode-free Li-ion Battery (AFLB) is an alternative to a new Li-ion battery model that offers high energy density at the same battery size as conventional models. Uncontrolled dendrite growth inactive the lithium deposition, resulting in decreased specific capacity, shortened lifecycle, and reduced coulombic efficiency. This work reported the utilization of graphene derived from pencil graphite for coating Cu foil as a current collector in AFLBs, to mitigate the formation of lithium dendrites and enhance battery capacity. The graphene-coated Cu foil exhibits a specific capacity of 143 mAh/g, representing a 20 mAh/g increase compared to batteries lacking a graphene coating. The coulombic efficiency of the battery with graphene coating in the charging and discharging process for three cycles is 84.53% in the 1st cycle, 101.44% in the 2nd cycle, and 98.58% in the 3rd cycle.
Sintesis, Karakterisasi Struktur, dan Kajian In Silico Potensi 2'-Hidroksicalkon dan Flavonol Tersubstitusi Trimetoksi sebagai Inhibitor Main Protease (MPro) SARS-CoV-2 Ihsan Ikhtiarudin; Neni Frimayanti; Musyirna Rahmah Nasution; Rabiatul Adawiyah; Enda Mora; Abdi Wira Septama
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.78445.98-119

Abstract

Pada penelitian ini, 2'-hidroksicalkon (C345) dan flavonol (F345) tersubstitusi trimetoksi telah disintesis menggunakan metode iradiasi microwave dan metode pengadukan. Struktur kedua produk telah dikarakterisasi melalui analisis spektroskopi UV-Vis, FT-IR, 1H NMR, 13C NMR, dan HRMS. Hasil analisis spektroskopi menunjukkan bahwa kedua produk memiliki struktur yang sesuai dengan struktur molekul target yang diharapkan. Selain itu, hasil sintesis juga menunjukkan bahwa metode iradiasi microwave terbukti dapat mempercepat waktu reaksi (dari 1,5-3,0 jam menjadi 3-6 menit) dan meningkatkan rendemen produk murni pada sintesis senyawa C345 (55,31 %) dan F345 (83,65 %). Selanjutnya, hasil docking menunjukkan bahwa kedua senyawa dapat membentuk ikatan hidrogen dengan beberapa residu penting pada sisi aktif dan dapat terikat pada kedua situs katalik MPro SARS-CoV-2 (PDB ID:6M2N), yaitu His41 dan Cys145 melalui interaksi hidrofobik dengan nilai energi bebas pengikatan yang lebih negatif (-8,95 dan -9,02 kcal/mol) dibandingkan dengan baicalein sebagai inhibitor pembanding. Hasil kajian in silico lainnya juga menunjukkan bahwa kedua senyawa memiliki profil farmakokinetik yang baik dan memiliki sifat kemiripan dengan obat berdasarkan aturan Lipinski, Ghose, Veber, Egan, dan Muegge. Selain itu, senyawa F345 juga diprediksi memiliki risiko toksisitas yang lebih kecil dibandingkan dengan baicalein. Synthesis, Structural Characterization, and In Silico Study of the Potential of 2'-Hydroxychalcone and Trimethoxy-Substituted Flavonols as Inhibitors of the Main Protease (MPro) of SARS-CoV-2. In this study, trimethoxy-substituted 2'-hydroxychalcone (C345) and flavonol (F345) were synthesized using microwave irradiation and stirring methods. The structure of the two products were characterized by spectroscopic analyses including UV-Vis, FT-IR, 1H NMR, 13C NMR, and HRMS. The result of spectroscopic analyses showed that the products had structures consistent with the expected target molecules. In addition, the synthesis results showed that the microwave irradiation method was proven to speed up the reaction time (from 1.5-3.0 hours to 3-6 minutes) and increased the yield of pure product in the synthesis of compounds C345 (55.31 %) and F345 (83.65 %). Furthermore, the docking result showed that the two compounds can form hydrogen bonds with several important residues on the active site and also can bind to catalytic dyad of the SARS-CoV-2 MPro (PDB ID:6M2N), namely His41 and Cys145 through hydrophobic interactions with a more negative binding free energy (-8.95 and -9.02 kcal/mol) than baicalein as a reference inhibitor. The result of silico studies also showed that the two compounds exhibited good pharmacokinetic profiles and drug-likeness properties based on Lipinski, Ghose, Veber, Egan, and Muegge rules. In addition, compound F345 was also predicted to has a smaller toxicity risk compared to baicalein.
Studi Optimisasi dan Kinetika Adsorpsi Silika dari Lumpur Lapindo dengan Metode Sol-Gel Menggunakan P123-Putih Telur Maria Ulfa; Anisa Ayu Solikah; Zahra Ayu Fadhilah; Ida Setiarini; Zulfana Qoulan Syadida
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.75659.49-61

Abstract

Dalam penelitian ini, silika yang disintesis dari Lapindo lumpur dengan metode sol-gel menggunakan P123-putih telur dan berhasil diterapkan sebagai adsorben ibuprofen. Konsentrasi awal, berat adsorben, pH dan suhu diterapkan untuk mengoptimalkan kondisi reaksi eksperimental utama menggunakan metode batch. Optimalisasi ini didasarkan pada maksimalisasi pengurangan ibuprofen menggunakan silika dari Lumpur Lapindo. Penelitian ini menunjukan bahwa dua parameter yang paling relevan untuk adsorpsi ibuprofen adalah suhu adsorpsi dan dosis adsorben. Berdasarkan model adsorpsi, kondisi optimal untuk adsorpsi ibuprofen maksimum ditentukan selama 60 menit sebagai 100 mg/L, 45±0,5 ℃, pH 5 dan dosis katalis 0,03 g, menghasilkan persentase pengurangan adsorpsi masing-masing 94,88; 96,04; 95,57; dan 96,65%. Kinetika adsorpsi ibuprofen juga dievaluasi dan hasil eksperimen dijelaskan dengan baik menggunakan pseudo pertama dan model orde kedua semu. Studi kinetik yang menggunakan analisis regresi linier mengungkapkan adsorpsi cocok dengan pseudo kinetik orde kedua dengan nilai energi aktivasi adalah 0,441 kJ/mol dan faktor pra-eksponensial adalah 1,21 L2‧mol-2‧min-1 yang mengonfirmasi bahwa silika dari Lumpur Lapindo bisa menjadi alternatif yang baik untuk menghilangkan ibuprofen melalui adsorpsi.Optimization and Ibuprofen Kinetical Adsorption Study of Silica from Lapindo Mud (SLM) by Sol-gel Method. This study successfully applied silica synthesized from Lapindo mud by sol-gel method using P123-white egg as an adsorbent for reducing ibuprofen. An initial concentration, adsorbent weight, pH, and temperature were applied to optimize the main experimental reaction conditions using batch methods. This optimization was based on maximizing ibuprofen removal of the silica from lapindo mud samples. The results show that the two most relevant parameters for ibuprofen adsorption are the adsorption temperature and adsorbent dosage. According to the Kinetics model, the optimum condition for the maximum ibuprofen adsorption was determined during 60 min at ibuprofen concentration of 100 mg/L at 45±0.5 °C (pH 5) with catalyst dosage of 0.03 g, resulting in 94.88, 96.04, 95.57, and 96.65% ibuprofen removal, respectively. The kinetics of the ibuprofen adsorption was also evaluated, and the experimental results were well described using a pseudo-first and pseudo-second-order model. The kinetic studies using linear regression analysis revealed that the adsorption fits pseudo-second-order kinetic with the value of the activation energy of 0.441 kJ/mol and the pre-exponential factor of 1.21 L2‧mol-2‧min-1, confirming that the silica from Lapindo mud is a good alternative for removal ibuprofen through adsorption.
Effect of Adhesive-Particle Ratio and Avocado Seed Filler on the Characteristics of Particleboard Made from Oil Palm Empty Fruit Bunches Mirna Rahmah Lubis; Fachrul Razi; Tasha Salsabilla; Kausar Kausar; Fezi Rizky Husein
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.76881.70-81

Abstract

Conservation efforts in Indonesian forests have become a development priority crucial for maintaining ecosystem balance, coupled with the endeavor to preserve the judicious use of wood. The demand for wood increases with its development, but its diminishing availability poses challenges for the industry. Efforts to reduce this impact involve finding environmentally friendly solutions, namely by utilizing waste to create new products. Therefore, this study focuses on reprocessing oil palm fruit bunches into particleboard using polyvinyl acetate and dibutyl phthalate as adhesives. The variables studied include the adhesive/particle ratio and the percentage of avocado seed filler. The resulting composite was tested for modulus of rupture, moisture content, modulus of elasticity, thickness swelling, density, and tensile strength. These results show that particleboard with an adhesive/particle ratio of 1.6 and 2% avocado seeds can enhance modulus of rupture, thickness swelling, moisture content, and density under the SNI 03- 2105-2006 standard.
Karakterisasi Pektin yang Diekstraksi dari Kulit Pisang Ambon Hijau (Musa acuminata Colla) dengan Spektroskopi FT-IR dan Analisis Kemometrik Renny Indrawati; Olivia Laura Nitte; Yuyun Yuniati
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.70208.1-11

Abstract

Limbah kulit buah pisang ambon hijau (Musa acuminata Colla) merupakan salah satu kandidat bahan baku pektin yang murah dan mudah ditemukan. Ekstraksi pektin dapat dilakukan dengan berbagai metode dan pelarut asam, namun akan mempengaruhi rendemen serta karakteristik pektin yang dihasilkan. Di sisi lain, spektroskopi FTIR dapat digunakan untuk karakterisasi pektin secara cepat, mudah, dengan sejumlah kecil sampel, tetapi data spektrum vibrasi pada rentang bilangan gelombang yang cukup luas seringkali tidak mudah dibedakan antar sampel. Analisis kemometrik multivariat dapat diterapkan untuk memudahkan analisis data. Tujuan penelitian ini adalah untuk membandingkan karakteristik pektin yang diekstraksi dari kulit pisang dengan variasi pelarut (asam klorida dan asam sitrat) dan waktu ekstraksi (5, 10, dan 15 menit) menggunakan metode microwave, serta melakukan komparasi pektin hasil ekstraksi terhadap pektin komersial dengan metode analisis FTIR dan kemometrik. Hasil penelitian menunjukkan keberhasilan ekstraksi pektin yang dikonfirmasi dengan adanya vibrasi gugus fungsi pektin pada spektrum FTIR. Analisis semi-kuantitatif dengan perbandingan data serapan gugus karboksil teresterifikasi dan karboksil bebas menunjukkan pektin hasil ekstraksi dengan pelarut asam sitrat memiliki derajat esterifikasi lebih tinggi dibandingkan hasil ekstraksi dengan asam klorida. Analisis komponen utama mengonfirmasi kedekatan spektrum pektin hasil ekstraksi dengan asam sitrat ataupun asam klorida selama 10 menit dengan spektrum pektin komersial.Characterization of Pectin Extracted from Banana Peels (Musa acuminata Colla) using FTIR Spectroscopy and Chemometric Analysis. The peel of green banana Musa acuminata Colla is a potential source of pectin. Pectin extraction can be performed using various methods and solvents, but it might influence the characteristics of the result. On the other hand, FTIR spectroscopy can be used to rapidly and simply characterize pectin, but the vibrational data over a wide range of wavenumbers is not easily distinguished between samples. Multivariate chemometric analysis can be applied to ease data analysis. This study aimed to compare the characteristics of pectin obtained after microwave-assisted extraction of the banana peels using different solvents (hydrochloric acid and citric acid) and extraction time (5, 10, and 15 minutes), as well as to compare those pectins toward its commercial grade using chemometric analysis. The result showed successful pectin extraction, as revealed by particular vibrations of functional groups in the pectin structure. Based on semi-quantitative analysis, the absorption band ratio between esterified carboxyl groups and free carboxyl groups revealed that the pectin extracted using citric acid had a higher degree of esterification than that extracted using hydrochloric acid. Principal component analysis confirmed the closeness of pectin obtained after 10 minutes of extraction using citric acid or hydrochloric acid to that of commercial pectin.
Profil Kandungan Kimia, Fenolik Total, dan Aktivitas Antioksidan Ekstrak Etanol Tumbuhan Litsea firma (Blume) Hook F Yana Aisya Putri; Rini Muharini; Ira Lestari; Masriani Masriani; Rudiyansyah Rudiyansyah; Antonius R.B. Ola
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.74158.38-48

Abstract

Litsea firma (Blume) Hook f atau medang piawas merupakan salah satu tumbuhan tingkat tinggi yang dijumpai di Kabupaten Melawi, Kalimantan Barat, Indonesia. Masyarakat setempat memanfaatkannya sebagai obat tradisional untuk menyembuhkan alergi kulit dan menghilangkan bau badan. Penelitian ini bertujuan untuk menentukan profil kandungan kimia, fenolik total, dan aktivitas antioksidan ekstrak akar, batang, dan daun Litsea firma. Analisis fitokimia dan kromatogram reversed phase-high performance liquid chromatography (RP-HPLC) menunjukkan bahwa komponen utama pada setiap ekstrak etanol adalah golongan senyawa fenolik dan cenderung bersifat polar. Kadar fenolik total ditentukan menggunakan metoda Folin-Ciocalteu. Hasil menunjukkan bahwa kadar fenolik total tertinggi adalah ekstrak etanol batang sebesar 90,85 mg GAE/g ekstrak, diikuti ekstrak akar (70,29 mg GAE/g ekstrak) dan daun (51,52 mg GAE/g ekstrak). Penentuan aktivitas antioksidan dilakukan menggunakan 2,2-Diphenyl-1-picrylhydrazyl (DPPH) dengan asam askorbat sebagai kontrol positif. Ekstrak akar, batang, dan daun menunjukkan aktivitas antioksidan moderat dengan IC50 secara berurutan sebesar 134,45 ppm, 112,21 ppm, dan 157,94 ppm,. Dengan demikian, ekstrak batang merupakan sumber senyawa fenolik dan antioksidan yang lebih baik dibandingkan bagian lain tumbuhan L. firma (Blume) Hook f. Characterization of Chemical Composition, Phenolic Content, and Antioxidant Activity of Ethanol Extract from Litsea firma (Blume) Hook F Plants. Litsea firma (Blume) Hook f is one of the higher plants distributed widely in Sungai Pinang Village, Melawi Regency, West Kalimantan, Indonesia. Local people use some parts of the plant as a traditional medicine to cure skin allergies and eliminate body odor. This study aimed to analyze the chemistry profile, measure the phenolic content, and determine the antioxidant activity of Litsea firma roots, stems, and leaf extracts. Phytochemical and reversed phase-high performance liquid chromatography (RV-HPLC) chromatogram analysis on each ethanolic extract showed that each extract possessed a similar phytochemical profile of polar phenolic compounds as major compounds. The Folin-Ciocalteu method was used to determine the total phenolic content using gallic acid as a standard. The results showed that the total phenolic content in the roots, stems, and leaves extract was 70.29, 90.85, and 51.52 mg GAE/g extract, respectively., where phenolic content in the stems was the highest. Antioxidant activity was evaluated using 2,2-Diphenyl-1-picrylhydrazyl (DPPH) with ascorbic acid as a reference standard. The extracts of the roots, stems, and leaves showed moderate antioxidant activity with IC50 values of 134.45 ppm, 112.21 ppm, and 157.94 ppm, respectively. Thus, stem extract Litsea firma Blume has a better antioxidant and phenolic resource from this species.
Suppressed Ion Chromatographic Analysis of Anionic Macroelements in Nutmeg (Myristica fragrans) Diversity Specific to North Maluku Muhammad Amin; Deasy Liestianty; Abu Rahmat Ibrahim; Nahdiah Amin; Budhi Oktavia
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.80543.151-161

Abstract

This study proposed an ion chromatography method for analyzing anionic macroelements (fluoride, chloride, nitrite, bromide, nitrate, sulfate, and phosphate), and applied it to nutmeg (Myristica fragrans) diversity to explore the potential of nutmeg as an electrolyte. The analysis method was based on a suppressed conductivity system that simultaneously analyzed the anionic macroelements on Metrohm Supp A 250/4.0 column using 8.0 mM sodium carbonate (Na2CO3) and 0.25 mM sodium bicarbonate (NaHCO3) as a mixture eluent. Excellent peak resolution and completed separation were achieved within 18 min when the flow rate of the detector was 0.8 mL/min. The peak height with calibration curves at 2.5 ‒ 30.0 mg/L concentration ranges was obtained for all anionic macroelements. All collected nutmeg samples were specific to North Maluku. Based on the standard samples used, the analysis results revealed that only four anionic macroelements (chloride, nitrate, sulfate, and phosphate) were found in the nutmeg samples, and the concentration of each anion (e.g., chloride ion, and so) was different for each type of nutmeg. The highest total of anionic macroelements concentration was found in the Myristica succedanea (1605.05 mg/kg) nutmeg sample, while Myristica specioga had the lowest (661.76 mg/kg). The method was validated regarding the detection limit (LOD) and reproducibility.

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