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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 124 Documents
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KAJIAN KETAHANAN BETON DENGAN TAMBAHAN CAMPURAN FLY ASH DAN LIMBAH KARBIT DALAM MEDIA ASAM DAN GARAM (DURABILITY STUDY OF SELF COMPACTING CONCRETE WITH ADDED A MIXTURE OF FLY ASH AND CALCIUM CARBIDE WASTE IN ACID AND SALT MEDIUM) Illen Stevani; Titin Anita Zaharah; Imelda Hotmarisi Silalahi
Indonesian Journal of Pure and Applied Chemistry Vol 6, No 2 (2023)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v6i2.62858

Abstract

Cement is one of the building blocks of concrete. However, it releases about one ton of carbon dioxide (CO2) gas for every ton of cement produced. Therefore, it is necessary to replace cement in the manufacture of concrete. It is known that a mixture of fly ash and calcium carbide waste has a chemical composition that resembles cement containing silica, alumina, and calcium oxide compounds so that it has the potential to replace cement in making self-compacting concrete. This research was conducted by utilising fly ash waste and carbide waste as additional materials to replace the use of cement by 35% in self compacting concrete. The composition of the waste used in the concrete mix in this study consisted of 25% fly ash waste and 10% calcium carbide waste. Analysis of the elemental composition of self-compacting concrete containing fly ash and calcium carbide waste was obtained from XRF data, the compressive strength of self-compacting concrete samples was tested, their resistance in acid and salt media was studied through the results of compressive strength test analysis, then compared with self-compacting concrete containing 100% cement. The XRF results showed that the elemental composition of the mixture of fly ash, calcium carbide waste, and cement was similar to that of cement alone, but the CaO and SiO2 content of the mixture was still higher than that of cement alone. Based on the compressive strength test analysis results, it was found that the compressive strength values of the self-compacting concrete samples were lower than the compressive strength values of the control of self-compacting concrete samples (cement only). Self-compacting concrete samples soaked in acid and salt media for 28 days showed a decrease in compressive strength, both in self compacting concrete containing a mixture of fly ash, calcium carbide waste, and cement, and concrete containing only cement. The compressive strength values of the fly ash and calcium carbide waste on self-compacting concrete samples in this study were at the range of 28 MPa to 29 MPa, still within the SNI 2847-2019 quality standard, which is the normal concrete quality standard with a compressive force of 15-30 MPa, even though they have been exposed to acid or salt. This allows efforts in replacing cement in self compacting concrete by adding the composition of fly ash waste and calcium carbide waste.
VARIATION OF SINTERING TEMPERATURE IN THE SYNTHESIS OF FLUORAPATITE FROM SNAIL SHELLS (Achatina fulica) USING THE SOL-GEL METHOD Charlena Charlena; Yessie Widya Sari; Wulan Islamia
Indonesian Journal of Pure and Applied Chemistry Vol 6, No 3 (2023)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v6i3.67697

Abstract

Dental caries can cause porous cavities and even broken teeth, necessitating natural teeth extraction and replacement with implants. Fluorapatite, a dental implant material, can be synthesized from snail shells containing 98% calcium carbonate. This study aims to identify the characteristics of fluorapatite and determine the effect of variations in sintering temperature on the synthesis of fluorapatite made from snail shells using the sol-gel method. Variations of sintering temperature used are 700, 900, and 1100 °C. The results showed that fluorapatite synthesized with the sintering temperature of 900 °C demonstrates the highest crystallinity, according to the diffractogram results, there is an 83% presence of the apatite phase at an angle of 31.8126°, with a crystal size of 79 nm and a particle size of 0.5 µm. Fourier-transform infrared spectroscopy analysis on the sample showed the presence of OH, OH−F, and PO43− functional groups. The sample showed a spongy surface morphology with hexagonal-shaped flowers—a Ca/P molarity ratio 1.67
EFFECT OF POTASSIUM HYDROXIDE CONCENTRATION AS A CATALYST ON THE YIELD OF COCONUT OIL (Cocos nucifera) TRANSESTERIFICATION Chaleb Paul Maanari; Sanusi Gugule; Feti Fatimah; Aisyiah Restutiningsih Putri Utami; Mustapa Mustapa; Stefan Marco Rumengan; Miftahul Jannah; Jakub Saddam Akbar; Djois Sugiaty Rintjap
Indonesian Journal of Pure and Applied Chemistry Vol 6, No 3 (2023)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v6i3.65513

Abstract

Research has been carried out on the effect of potassium hydroxide catalyst concentration on the yield of coconut oil (Cocos nucifera) transesterification and continued to characterize the reaction results. The concentration of potassium hydroxide used was 1, 2, and 3% by weight of coconut oil with ethanol as the reactant. The data processing used was the one-way analysis of variation and its characterization from a physicochemical perspective, followed by the analysis of gas chromatography-mass spectroscopy (GCSM) and infrared spectrophotometry. Based on the data processing results, potassium hydroxide concentrations of 1, 2, and 3% did not affect the yield of the transesterification reaction of coconut oil, and the results were 74.5264%, 71.9330%, and 69.0420%. The characterization results show that the physicochemical properties of the reaction products, such as acid number, density, and viscosity, comply with the Indonesian National Standard (SNI) for biodiesel. The results of the GCMS analysis showed that nine peaks were dominated by ethyl laurate.
EXTRACTION OF TITANIUM COMPOUNDS FROM CHLORIDE ACID SOLUTION OF BAUXITE RESIDUE USING ACID-BASE PRECIPITATION METHOD Ernilia, Kristina; Silalahi, Imelda Hotmarisi; Zaharah, Titin Anita
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.66531

Abstract

The bauxite residue from the Bayer process can be categorized into red cake and iron sand. In this paper the iron sand has been characterized and used as a research object in order to obtain material with a higher concentration of the titanium element. Iron sand has a dominant chemical content of 60% iron and 10% titanium. Titanium can be extracted by several methods, one of which is the precipitation method. The precipitation process involves dissolving minerals in an acidic solution and extracting them with a base. The type of base and the pH are factors that affect the precipitation process. The aim of this study is to determine the effect of variations in pH and type of base on the extraction of TiO2 from a solution of iron sand in hydrochloric acid and to determine the elemental composition of the precipitation product. The first treatment of the iron sands was magnetic separation, which yielded 31.76% of relatively weakly magnetic sand. The magnetic sand was leached by using HCl (25%) to result in a solid with a percentage recovery of 40.8%, followed by an alkali fusion reaction with NaOH to give 56.85% of material. This material was then dissolved in the concentrated HCl and precipitated with NH4OH and NaOH at various pH values. The elemental analysis by using XRF of the precipitation products shows that the precipitation in NH4OH and pH 8 gives the material with the highest content of the element Ti, which is 49.5%, increases from only 10% in the iron sand. The selectivity of titanium for the iron element seems to be higher for the precipitation in NaOH, pH 8 than in NH4OH, pH 8, with Ti/Fe ratios of 1.50 and 1.44, respectively
PENGARUH PENAMBAHAN ION Ca2+ PADA PENGOLAHAN AIR GAMBUT MENGGUNAKAN KOAGULAN KITOSAN (THE EFFECT OF ADDITIONAL Ca2+ IONS ON PEAT WATER TREATMENT USING CHITOSAN COAGULANT) Putri, Tassya Amalia; Anis, Anis Shofiyani; Titin, Titin Anita Zaharah
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.66688

Abstract

Peat water generally has a brownish-red color and organic matter that can pollute the environment so it is not suitable for use. This study aims to determine the effectiveness of chitosan with the addition of salts containing Ca2+ ions, namely CaCO3 and CaCl2, on reducing peat water parameters. The work procedure includes the preparation of chitosan gel and the preparation of CaCO3 and CaCl2 solutions made with concentration variations of 100, 200, 300, 400, and 500 ppm. Determination of organic substance concentration was carried out by permanganometric titration method The effectiveness of increasing pH in the presence of CaCO3 and CaCl2 salts in peat water was 7. The highest turbidity reduction efficiency after coagulation in peat water was 41.98% with the addition of CaCO3 and 37.37%, with the addition of CaCl2 occurred at a concentration of 300 ppm. The highest efficiency of color reduction after coagulation of peat water was with the addition of 60.7% CaCO3, while with the addition of CaCl2 58% occurred with the addition of 200 ppm CaCl2. The efficiency of reducing organic matter in peat water after coagulation with the addition of CaCO3 was 48.35% at a concentration of 300 ppm while with the addition of CaCl2 it was 48.35%. The addition of Ca2+ ions from CaCO3 and CaCl2 salts is considered to increase the effectiveness of chitosan as a coagulant for treating peat water.
PENGARUH PENAMBAHAN KOAGULAN BIJI KELOR TERHADAP PENURUNAN KADAR LOGAM KROMIUM (Cr), MANGAN (Mn), DAN TIMBAL (Pb) MENGGUNAKAN ICP-OES (THE ADDITION EFFECT OF KELOR SEEDS COAGULANT ON THE DECREASING OF CHROMIUM (Cr), MANGANESE (Mn), AND LEAD (Pb) LEVELS USING ICP-OES) Susvira, Dian; Ramadhan, Muhammad Bagus; Susparini, Ninik Triayu; Situmeang, Boima; Widiyanto, Holisha; Bialangi, Nurhayati; Musa, Weny JA
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.63599

Abstract

Electroplating process has a negative effect in form metal ions waste. Today, industrial wastewater treatment widely using aluminum sulfate or alum as synthetic coagulants, although hazardous and expensive. This study was conducted to discover the activity of Moringa seeds (Moringa oleifera) as natural coagulants to substitute synthetic coagulants. Trapped metal ions detected by ICP-OES. The results showed that moringa seed coagulants could reduce 53% Cr, 64.56% Mn, and 92.89% Pb in the addition of 15 grams of moringa seed coagulants.
ANTI-INFLAMMATORY GERANYL ESTER OF IBUPROFEN AND CORRESPONDING FURFURYL AND ISOAMYL AMIDES WITH IN SILICO ANALYSIS Bepary, Sukumar; Biswas, Bishyajit Kumar; Jahan, Sayeda; Rahman, Sanjida; Islam, Md. Toufiqul
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.64408

Abstract

Ibuprofen is a commercially available and widely used non-steroidal antiinflammatory drug being used in managing inflammatory disorders worldwide. This acid molecule has been subjected to esterification by coupling with geraniol as well as to amide formation by coupling with furfurylamine and isoamylamine for observing the changes in anti-inflammatory potential due to the addition of relatively long aliphatic chains. During these reactions, the reaction yields were within 88-94%. In this in vitro evaluation, the prevention of egg albumin denaturation and human red blood cell (HRBC) membrane stabilization were observed. For observing potential for preventing egg albumin denaturation, the synthesized compounds were applied as doses of 10 μg/ml, 20 μg/ml, 30 μg/ml, and 40 μg/ml. For observing the better response from ester derivative, 50 μg/ml, 100 μg/ml and 200 μg/ml doses were also tried. For observing the Human RBC membrane stabilization with amides, 50 μg/ml and 100 μg/ml doses were tried. Ibuprofen was taken as the reference compound and was applied in same doses in all of the experiments. The antiinflammatory potential of the synthesized geranyl ester was remarkable in comparatively higher doses (16%, 45%, and 54% reduction in protein denaturation from 50 μg/ml, 100 μg/ml, and 200 μg/ml doses respectively). Isoamylamide was relatively more potent than geranyl ester in preventing egg albumin denaturation (reductions were 9%, 13%, 17%, and 31% from 10, 20, 30, and 40 µg/ml doses respectively). Furfurylamide was more potent than isoamylamide by showing 9%, 17%, 31%, and 46% inhibitions respectively. There were dose-dependent antiinflammatory actions observed from both the geranyl ester and amides. The synthesized compounds were also subjected to the in silico study for observing the ligand-receptor interactions in the binding site of the cyclooxygenase enzyme.
PENGARUH PENGGUNAAN ASAM ORGANIK UNTUK MENURUNKAN KADAR LOGAM TIMBAL (Pb) PADA DAGING SIPUT GONGGONG (THE EFFECT OF THE USE OF ORGANIC ACIDS TO REDUCE THE LEVELS OF METAL LEAD (Pb) ON THE MEAT OF GONGGONG SNAILS) Amelia, Fitrah; Ramses, Ramses; Ismarti, Ismarti
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 1 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i1.64459

Abstract

Pollution that often occurs at sea is heavy metal pollution. Heavy metals that often pollute are Lead metals (Pb). Heavy metal pollution that occurs often has an impact on plants and animals that live in the sea. Animals that are often contaminated with heavy metals are snails because of the nature of snails that can accumulate metals due to their persistent nature, filter feeders, slow movements to avoid metal pollution. The purpose of this study is to reduce metal pollution in seafood, one of the ways that can be done by soaking seafood using organic acids such as tamarind and lime, because organic acids contain citric compounds that can bind to metals. This type of research is an experimental research design with Randomized Pretest-posttest control group design. The experimental design used was a Completely Randomized Design (CRD). Metal content analysis was carried out using the Perkin Elmer Type PinAAcle 900T brand AAS. The results were obtained that tamarind can decrease Pb metal levels in the bark snail meat at optimum conditions at a concentration of 10%, immersion time of 60 minutes and a percentage reduction of 47.1%. While the optimum condition of lime occurs at 10% concentration and soaking time is 30 minutes with a 25% percent decrease. So it can be said that tamarind is better in reducing metal content compared to Lime
AKTIVITAS ANTIBAKTERI KURKUMIN DAN KOMPLEKS TEMBAGA (II) KURKUMIN TERHADAP S.AUREUS DAN E.COLI Firdaus, Giska Ristianty; Silalahi, Imelda Hotmarisi; Ardiningsih, Puji
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 2 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i2.77806

Abstract

Copper (II) complex of curcumin was prepared from the reaction between curcumin and a metal precursor (CuCl2.2H2O) in ethanol with a mole ratio curcumin to metal 2:1. The FTIR spectrum of Cu2+-curcumin shows a change in the absorption band and a shift in the wave number, especially in the absorption band of the phenolic "“OH group 3510.45 cm-1 which is a stretching vibration that becomes wider and shifts to a larger wave number, namely 3514.30 cm-1. Compared with free curcumin spectrum the absorption band of the C=O functional group shows a change where in free curcumin is at 1627.92 cm-1 while in the Cu2+-curcumin complex the is at 1735.93 cm-1 this indicate the coordination of metal ions with curcumin. The IR spectrum shows a typical absorption band for the metal oxygen group, Cu-O 480.28 cm-1 in the Cu2+-curcumin complex. The UV-Vis spectrum of the Cu2+-curcumin complex show a shift towards a larger wavelength (red shift/batochromic) of (~2 nm). Antibacterial activity of Cu2+-curcumin complex compound is active in inhibiting S.aureus and E.coli. After complexation, the activity against the tested microorganisms generally increased and the complex showed higher activity than free curcumin.
PENGARUH LAMA PEMANASAN TERHADAP SIFAT FISIKOKIMIA DAN AKTIVITAS ANTIOKSIDAN EKSTRAK VCO DARI CAMPURAN KUNYIT, JAHE GAJAH, BAWANG PUTIH DAN DAUN SIRIH (THE INFLUENCE OF HEATING DURATION ON THE PHYSICOCHEMICAL PROPERTIES AND ANTIOXIDANT ACTIVITY OF VCO EXTRACT FROM A MIXTURE OF TURMERIC, GINGER, GARLIC, AND BETEL LEAF) Wibowo, Muhamad Agus; Pitri, Sela Rahma; Ardiningsih, Puji; Jayuska, Afghani
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 2 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i2.77401

Abstract

The addition of spices to herbal oil increases bioactivity and physicochemical properties. Turmeric, ginger, garlic, and betel leaf are herbal plants that have the potential to enhance the antioxidant activity and physicochemical properties of herbal oil. This study aims to evaluate the effect of heating temperature on the phytochemical content, physicochemical properties, and antioxidant activity of VCO-based herbal oil with the addition of these spices. The research methods include phytochemical analysis, physicochemical analysis, and antioxidant activity testing using the DPPH method. The herbal oil was prepared at 100 °C with a ratio of herbal plants to VCO of 4:30, and heating durations of 15, 30, 60, and 120 minutes were varied. The results show the presence of flavonoids, terpenoids, saponins, phenolics, and alkaloids in the herbal oil, while VCO contains flavonoids, terpenoids, saponins, and alkaloids, with the addition of herbal plants providing additional phenolic compounds. Physicochemical testing of the herbal oil formulations with heating durations of 15; 30; 60; and 120 minutes respectively shows water content of 0.0923; 0.0189; 0.0165; and 0.0123%, density of 0.98522; 1.02854; 1.55110; and 1.1227 g/mL, acidity level of 4.12; 4.80; 4.28; and 4.38, free fatty acid content of 0.0018; 0.0021; 0.00162, and 0.0029%, and peroxide value of 0.0021; 0.0035; 0.0035; and 0.0042 meq/kg. The IC50 value obtained from the antioxidant activity testing of the herbal oil formulation with a heating duration of 60 minutes is 577.3 ppm, while for VCO, the IC50 obtained is 1029.6 ppm. This indicates that the addition of spices and herbal plants can enhance the bioactivity of VCO-based herbal oil formulations. The addition of spices and herbal plants increases phytochemical content and antioxidant activity, but longer heating durations may decrease the physicochemical properties of herbal oil formulations

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