cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ajuk Sapar
Contact Email
ajuk.sapar@chemistry.untan.ac.id
Phone
+6281282990575
Journal Mail Official
anthoni.b.aritonang@chemistry.untan.ac.id
Editorial Address
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University Jl. Prof. Dr. Hadari Nawawi, Pontianak, Kalimantan Barat, Indonesia
Location
Kota pontianak,
Kalimantan barat
INDONESIA
Indonesian Journal of Pure and Applied Chemistry
Published by Universitas Tanjungpura
ISSN : 26208571     EISSN : 2620858X     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry
Indonesian Journal of Pure and Applied Chemistry (IJoPAC) was first established in 2018 as a scientific journal that accommodates researchers and education practitioners to publish scientific work and research results which are the results of experiments or literature studies in the field of chemistry. Publications are carried out periodically with three issues (January-April, May-August, September-December) in one volume per year. Published scientific work can be in the form of original articles, short communications and review results covering the fields of Physical chemistry, Organic chemistry, Analytical chemistry, Inorganic chemistry, Biochemistry / Biological Chemistry, Applied Chemistry. Focus and Scope of Indonesian Journal of Pure and Applied Chemistry covering the fields : Physical chemistry Organic chemistry Analytical chemistry Inorganic chemistry Biochemistry/Biological Chemistry Applied Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol 7, No 3 (2024)" : 5 Documents clear
PEMURNIAN HEMATIT DARI RED MUD PT INDONESIA CHEMICAL ALUMINA (ICA) DENGAN VARIASI SUHU KALSINASI Adhitiyawarman, Adhitiyawarman; Septiriyani, Melia; Zaharah, Titin Anita
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 3 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i3.70617

Abstract

Red mud is an insoluble fraction of bauxite ore, and it is a waste from bauxite processing into alumina. Red mud contaminated with alkaline substances and therefore poses a danger to the environment and humans. One of the largest bauxite processing companies in West Kalimantan is PT Indonesia Chemical Alumina (ICA). PT ICA can produce red mud around 240.000-450.000 each year. Red mud contains some minerals that are useful for various industries. The largest mineral content in red mud is hematite. Hematite is an iron oxide mineral with the chemical formula Fe2O3. This study aims to determine the hematite content of the extraction results from Red mud PT ICA. This research also investigates how different calcination temperatures during synthesis impact material properties, with analysis using XRF and XRD. It is known that the extracted sample contains 49.74% Fe2O3. The results of XRF analysis show that at 900 °C, the hematite content produced is higher (90.20%) compared to 800 °C (87.84%). The results of XRD analysis show that the position of the typical 2θ peaks of hematite that appear in both temperature variations is not too different, namely: 33.04 °; 35.515; 54.01 ° at 800 °C and 33,06 °; 35,55 °; 54,04 ° at 900 °C. The calcination temperature variation is also known to affect the percentage of hematite crystallinity, which is 18.23% at 800 °C and 24.87% at 900 °C. The crystal structure of hematite is rhombohedral.
ISOLASI SENYAWA ALKALOID DARI EKSTRAK METANOL DAGING BUAH Tabernaemontana macrocarpa Jack Wulandari, Adisti Riska; Alimuddin, Andi Hairil; Rudiyansyah, Rudiyansyah
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 3 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i3.77779

Abstract

The community has used Tabernaemontana macrocarpa Jack for traditional medicinal purposes such as toothaches, herpes, scabies, and also as poison on arrowheads. This research aims to isolate and characterize the structure of alkaloid compounds in the methanol extract of Tabernaemontana macrocarpa Jack. Extraction was carried out through maceration using methanol as the solvent. The methanol extract was partitioned using n-hexane, dichloromethane, and ethyl acetate. Fractionation was performed using gravity column chromatography, where silica gel was employed as the stationary phase, and a mixture of n-hexane-dichloromethane and dichloromethane-methanol with increasing polarity was used as the mobile phase. At this stage, nine combined fractions were obtained. Fractions that tested positive for alkaloid compounds were further separated using the preparative TLC method. The resulting isolate was a light yellow powder weighing 4 mg. The isolated compound was further characterized using 1H-NMR spectroscopy. The analysis results from the 1H-NMR spectrum suggest that the isolate is an indole alkaloid compound. Based on the 1H-NMR data, the isolate from fraction seven exhibited chemical shift values consistent with those of taberniacin, an indole alkaloid previously reported from Tabernaemontana divaricata.
PELARUTAN SILIKA PADA FRAKSI KUARSA KAOLIN MENGGUNAKAN Burkholderia cenocepacia Azhar, Annisa Sylvania; Wahyuni, Nelly; Sayekti, Endah
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 3 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i3.91962

Abstract

Dissolution of silica (SiOâ‚‚) from its insoluble form to a soluble form is crucial for enhancing its availability as precursor material. This study aimed to compare the effectiveness of silica dissolution by the bacterium Burkholderia cenocepacia producing organic acids (citrate, oxalate, acetate) and potassium hydroxide (KOH). Variations in incubation times using Burkholderia cenocepacia at 24, 96, and 192 hours were applied to samples of quartz-kaolin fractions and silica sand. The concentration of dissolved silica was measured using ICP-OES. The results showed maximum dissolution by B. cenocepacia in quartz-kaolin at 0.8493 mg/L (96 hours) and silica sand at 0.8638 mg/L (24 h). The dissolved silica from this procedure can be further processed for applications in agriculture as a nutrient for plants to overcome biotic and abiotic stress.
PENGARUH KOMBINASI PIGMEN KURKUMIN-β-KAROTEN TERHADAP SPEKTRA ABSORPSI DAN NILAI SPF PADA SEDIAAN LOTION Yanti, Ninda Meili; Alimuddin, Andi Hairil; Rahmalia, Winda
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 3 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i3.77543

Abstract

This research aimed to examine the effect of the combined use of curcumin and β-carotene pigments on their absorption spectra. Subsequently, these pigment combinations were incorporated into a lotion formulation to determine their respective Sun Protection Factor (SPF) values. Mixtures of curcumin and β-carotene were prepared at mass ratios (w/w) of 0:5, 1:4, 2:3, 3:2, 4:1, and 5:0. Their absorption spectra were analyzed with a UV-Vis spectrophotometer over the 200"“600 nm wavelength range using ethyl acetate as the solvent. Then, 6% of each pigment mixture was incorporated into a lotion base. The results of the UV-Vis analysis revealed no significant spectral shifts across the various mixtures. However, a notable increase in absorption intensity (a hyperchromic effect) was explicitly observed for the 1:4 mass ratio of curcumin to β-carotene. The SPF values for the lotion samples containing 6% of the pigment mixtures were as follows: 5.02 (0:5), 8.32 (1:4), 8.63 (2:3), 8.10 (3:2), 8.14 (4:1), and 8.09 (5:0). Although the observed increase was not statistically significant, these findings suggest that the combination of curcumin and β-carotene pigments can enhance the SPF value relative to that of the individual components.
EDIBLE FILM BERBASIS PULP KAKAO (Theobroma cacao L.) DAN KULIT BUAH SEMANGKA (Citrullus lanatus) SEBAGAI TEKNOLOGI FOOD PACKAGING Reski, Alpi Meitia; Patricia, Anggun Dwi; Azira, Ayu; Sihotang, Andreas; Tarigan, Indra Lasmana
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 3 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i3.75567

Abstract

This study evaluated the physical characteristics (thickness and surface morphology) and chemical properties (composition and functional groups) of edible films made from cocoa pulp and watermelon rind. Additionally, it investigated the effect of citrulline concentration on the solubility of the film and its impact on extending the shelf life of Jambi potato dodol. The experimental data were statistically analyzed using analysis of variance (ANOVA) to determine the significance of differences among treatments. The citrulline concentration variation factor consisted of two concentration levels, namely 5% and 15%. The results showed that the thickness of the edible film was 0.26 mm for the film containing 5% citrulline and 0.16 mm for the film with 15% citrulline. The viscosity of the film-forming solution influenced the surface morphology of the edible film. A chemical characteristics test was carried out using FTIR analysis, which showed the presence of several different functional groups at various wave numbers. Dodol packaged with edible film demonstrated a relatively good shelf life against microbial growth. The most effective edible film in enhancing resistance to bacterial contamination was the one containing 15% citrullin.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2024 2024


Reset
Filter By Issues
All Issue Vol 8, No 3 (2025) Vol 8, No 2 (2025) Vol 8, No 1 (2025) Vol 7, No 3 (2024) Vol 7, No 2 (2024) Vol 7, No 1 (2024) Vol 6, No 3 (2023) Vol 6, No 2 (2023) Vol 6, No 1 (2023) Vol 5, No 3 (2022) Vol 5, No 2 (2022) Vol 5, No 1 (2022) Vol 4, No 3 (2021) Vol 4, No 2 (2021) Vol 4, No 1 (2021) Vol 3, No 3 (2020) Vol 3, No 2 (2020) Vol 3, No 1 (2020) Vol 2, No 3 (2019) Vol 2, No 2 (2019) Vol 2, No 1 (2019) Vol 1, No 3 (2018) Vol 1, No 2 (2018) Vol 1, No 1 (2018) More Issue