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Fullerene Journal of Chemistry
Published by Universitas Negeri Manado
ISSN : 25981269     EISSN : 25985868     DOI : -
Core Subject : Science,
Chemistry
Fullerene Journal Of Chemistry is an chemistry indonesian journal presented by chemistry department, State University of Manado.
Arjuna Subject : -
Articles 173 Documents
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Adsorption Of Rhodamine B Dye By Acacia Bark Powder (Acacia crassicarpa) Mukhlis .; Lathifa Azury; Sela Andesti; T. Abu Hanifah; Sofia Anita; Itnawita Itnawita
Jurnal Kimia Fullerene Vol 11 No 2: Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v11i2.742

Abstract

Acacia bark powder (Acacia crassicarpa) is a biomass containing cellulose compounds as active sites for adsorption. This study aims to optimise the adsorption parameters of Rhodamine B by acacia bark powder. The method used in this study is batch adsorption. The adsorbent is prepared in powder form with a particle size of 100–200 mesh. SEM-EDS characterisation results showed a porous surface morphology of the adsorbent, dominated by carbon (C) and oxygen (O) elements. BET analysis revealed a specific surface area of 0.460 m²/g, pore volume of 4.361×10⁻³ cc/g, and pore diameter of 379.008 Å. FTIR results indicated the presence of functional groups N-H, -OH, C-H, C=O, C=C, and C-O. Optimal adsorption conditions were obtained at an adsorbent dose of 0.5 g, pH 2, contact time of 50 minutes, stirring speed of 200 rpm, adsorbate concentration of 40 mg/L, and temperature of 50°C, with an adsorption efficiency of 99.04% and adsorption capacity of 3.9326 mg/g. The results of this study indicate that Acacia crassicarpa bark powder has good performance in adsorbing Rhodamine B dye.
The Analysis of Vitamin C Content in Facial Serum Using UV–Vis Spectrophotometric Method Susanti Kamau; Abdon Saiya; Vlagia Paat
Jurnal Kimia Fullerene Vol 11 No 2: Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v11i2.767

Abstract

Facial serum is a category of skin care products designed to deliver concentrated active ingredients that promote the penetration of bioactive compounds into deeper layers of the skin, targeting various skin problems such as aging, hyperpigmentation, and acne. According to the literature, stable formulations of vitamin C at the right concentration can significantly reduce signs of aging and improve skin radiance. This study aims to determine the concentration of vitamin C contained in commercially available facial serums claimed to contain vitamin C, using the UV-Visible spectrophotometry method. Three samples were analyzed, namely; Serum 1, Serum 2, and Serum 3. A calibration curve was obtained using standard series concentrations of 2 ppm, 4 ppm, 6 ppm, and 8 ppm at an optimum wavelength of 241.50 nm, resulting in a regression equation of y = 0.0242x + 0.3022 with a correlation coefficient of r = 0.9975 and a determination coefficient of R² = 0.9950. The limit of detection (LOD) was 0.54 ppm and the limit of quantification (LOQ) was 1.81 ppm. The results of this study indicate that all tested samples contained vitamin C, with concentrations in Serum 1 = 338 mg/L, Serum 2 = 267.7 mg/L, and Serum 3 = 284.2 mg/L
Characterization of Secondary Metabolite Compounds from Ethyl Acetate Extract of Japanese Papaya Leaves (Cnidoscolus Aconitifolius) VIta Montolalu; Rymond Rumampuk; Emma Pongoh
Jurnal Kimia Fullerene Vol 11 No 2: Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v11i2.811

Abstract

Indonesia has abundant biodiversity and great potential as a source for the development of natural organic chemical compounds. One plant that is widely used traditionally is Japanese papaya (Cnidoscolus aconitifolius), which is known to have potential as a source of natural chemical compounds because it contains various secondary metabolites with pharmacological activities. This study aims to isolate and identify secondary metabolites from the ethyl acetate fraction of Japanese papaya leaves. Isolation was carried out using the maceration method, and separation and purification were done using gravity column chromatography and thin layer chromatography. The identification of compound structures was carried out using Proton Nuclear Magnetic Resonance (¹H-NMR) and Carbon-13 Nuclear Magnetic Resonance (¹³C-NMR) spectroscopy. The analysis results showed that the obtained isolate is suspected to be a compound in the flavanone group, namely 3',4',5-trihydroxyflavanone.

Page 18 of 18 | Total Record : 173

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