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Indonesian Journal of Pure and Applied Chemistry

IJoPAC
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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 93 Documents

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ADSORPSI ASAM LEMAK BEBAS DALAM MINYAK SAWIT MENTAH MENGGUNAKAN ADSORBEN ABU TANDAN KOSONG SAWIT M Syahwandi; Winda Rahmalia; Titin Anita Zahara; Thamrin Usman
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Research on the use of the oil palm empty fruit bunch (OPEFB) as an adsorbent for free fatty acid (FFA) adsorption on Crude Palm Oil (CPO) has been done. CPO is the main raw material in the manufacture of food products. The results of OPEFB adsorbent characteristics showed the amount of water content and ash content of 0,067% and 0,175%, XRF analysis obtained the greatest content of OPEFB in the form potassium metal as much as 44,24%, FTIR analysis identified that there were CO3 compounds in wave number 1648 cm-1 and SEM analysis indicates there are no pores in OPEFB. The result showed that the number of OPEFB with the best adsorption was 0,1 gram with 60 minute optimum contact time. The CPO adsorption process with OPEFB shows the Langmuir model with a correlation value (R2) of 0,8845 and the adsorptions kinetics follows the pseudo order 2 adsorption kinetics model with a correlation value (R2) of 0,9857. The results of this study showed the characteristics of CPO before and after adsorbed using 0,1 g of adsorbent OPEFB showed the amount of FFA level of 7,321% to 6,297%, water content of 0,0025% to 0,00119% and impurities content of 0,8847% to 0,8408%.

SINTESIS DAN TRANSISI ELEKTRONIK KOMPLEKS TEMBAGA (II)-KLOROFIL Imelda Hotmarisi Silalahi; Julan Julan; Muhammad Yusprianto; Rudiyansyah Rudiyansyah
Indonesian Journal of Pure and Applied Chemistry Vol 3, No 3 (2020)
Publisher : Tanjungpura University

The copper (II)-chlorophyll complex was prepared from the reaction between the chlorophyll isolated from cassava leaves and the metal ion precursor, CuSO4.5H2O in methanol under reflux for four hours. The FTIR spectra of the reaction product compared to the chlorophyll spectra show an indication of a complexation through metal coordination with the N atom from the phyrol ring replacing the magnesium (II) ion in chlorophyll.This assumption is drawn based on changes on FTIR spectra, i.e. vibration absorption originating from the CN and NH groups in the porphyrin ring and the appearance of the distinctive vibration band of nitrogen-metal bonds which is annotated as Cu-N groups at 599.88 cm-1. Another sign is the change in the OH and CO vibration bands which imply changes in aggregate properties that occur through inter-molecular interactions due to the introduction of copper (II) metal into the chlorophyll structure. The formation of copper (II)-chlorophyll compounds is also shown from the results of atomic absorption spectroscopy by recording copper metal in the product and reducing magnesium metal concentration. UV-vis spectra of chlorophyll in methanol show a characteristic band in the dark area (Soret band) at a maximum wavelength of 404 nm and the visible area (Q band) with the strongest intensity at 665 nm. These peaks appear to shift hypsochromically in the copper (II)-chlorophyll compound to 397 nm and 650 nm with higher absorptivity, indicating a change in the electronic transition of the chlorophyll after coordinating with the copper (II) ion. A new peak at 411 nm was also observed which is suggested to indicate that the copper (II) -chlorophyll complex is in an octahedral geometry in the aggregate coordinated via nitrogen atoms in the phyrol ring in place of the magnesium (II) ion.

ASAP CAIR DARI LIMBAH KULIT MANGROVE Avicennia alba UNTUK PENGAWETAN BAKSO IKAN (LIQUID SMOKE FROM MANGROVE SKIN WASTE Avicennia alba FOR THE PRESERVATION OF FISH BALLS) Anthoni Batahan Aritonang; Fransiska M Wenisda; Mega S Sofiana
Indonesian Journal of Pure and Applied Chemistry Vol 3, No 1 (2020)
Publisher : Tanjungpura University

Liquid smoke has been successful pabricated from mangrove Avicennia alba shell by pyrolysis method at a temperature of 400℃ for 3 hours. Liquid smoke was purified by adsorption using activated kaolinite as adsorbent. The test results showed that activated kaolinite could bring down the rancidness to become odorless and the color of liquid smoke from dark chocolate to gray colour. The composition of the liquid smoke compound was determined by using the Gass Chromatography-Mass Spectrophotometer (GC-MS) consists of 2-propanone (CAS) acetone 25.79% and furan, tetrahydro- of 10.37% and carbamic acid, monoammonium salt (CAS) ammonium carbamate of 58.46% . The LC50 value of pure liquid smoke ranging from 1000 ppm is an indication that it is not toxic and safe to use for food preservation. Activity test against the inhibition of microbial growth in fish meatballs, showed that ability. The higher the concentration of liquid smoke, the better the inhibition of microbial growth. Based on the results, it can be concluded that the liquid smoke produced from mangrove Avicennia alba shell purified by the activated kaolinite is very promising as a foodstuffs preservative

ADSORPTION OF Pb(II) BY POLYANILINE/SILICA GEL COMPOSITE: KINETICS AND ISOTHERM STUDIES Mas Inda Putrinesia; Nurlina Nurlina; Winda Rahmalia
Indonesian Journal of Pure and Applied Chemistry Vol 1, No 3 (2018)
Publisher : Tanjungpura University

Research on the study of kinetics and isotherm adsorption of Pb(II) by polyaniline/silica gel (PANI/SiO2) composite from glass waste has successfully been done. The polymerization of silica gel was prepared by sol-gel process. Meanwhile, PANI/SiO2 composite was prepared using sulfuric acid (H2SO4) as its dopants and hydrogen peroxide (H2O2) for oxidation process. Composition of oxide compound in PANI/SiO2 composite was analyzed by X-Ray Fluorosence (XRF) and Gas Sorption Analyzer (GSA). Adsorption of Pb(II) was carried out by contacting PANI/SiO2 with Pb(NO3)2 solution for 20, 40, 60 and 80 minutes, with concentrations of 150, 200, 250, 300, 350 and 400 mg/L. The optimum contact time was reached at 40 minutes. This adsorption followed pseudo-second order model with R2= 0.996. The first optimum adsorption capacity was reached in the concentration of 250 mg/L. Isotherm adsorption followed Langmuir models with R2= 0.954 (monolayer capacity= 51.02 mg/g).

KARAKTERISASI FLAVONOID DARI DAUN MUNDU (Garcinia dulcis [ROXB.] KURZ) SEBAGAI PENGOMPLEKS Pb (II) Emilda Sari; Ari Widiyantoro; Gusrizal Gusrizal
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 1 (2019)
Publisher : Tanjungpura University

Pb (II) merupakan salah satu zat beracun dan berbahaya. Keberadaannya dalam tubuh manusia dapat mengganggu sistem metabolisme tubuh. Penelitian ini bertujuan untuk mengkarakterisasi flavonoid yang diisolasi dari daun mundu (Garcinia dulcis) sebagai pengompleks logam Pb (II). Tahapan penelitian yang dilakukan meliputi persiapan sampel kemudian ekstraksi, isolasi, dan pemurnian senyawa menggunakan metode kromatografi vakum cair (KVC), kromatografi kolom gravitasi (KKG), dan kromatografi lapis tipis (KLT), sedangkan identifikasi senyawa dilakukan menggunakan spektroskopi ultraungu-tampak (UV-Vis) dan inframerah (IR) serta 1H-NMR. Penelitian ini telah berhasil memperoleh 6 fraksi gabungan dari KVC dan 6 fraksi gabungan dari proses KKG. Pada fraksi F4.1 dari KKG dilakukan pemurnian lebih lanjut dengan metode kromatografi lapis tipis (KLT) preparatif sehingga diperoleh 5 isolat. Pada isolat F4.1.3 dilakukan pengujian keberadaan flavonoid dengan uji fitokimia dan hasilnya positif mengandung fenolik dan flavonoid. Selanjutnya isolat tersebut dilakukan pengujian aktivitas pengompleks terhadap logam Pb (II) 100 ppm, 200 ppm dan 300 ppm. Berdasarkan hasil pengujian UV-Vis, isolat F4.1.3 terdapat dua pita pada 287 nm dan 291 nm yang menunjukkan adanya karakteristik senyawa flavonoid. Pergeseran batokromik dari 287 nm dan 291 menjadi 289 dan 293 nm ini setelah penambahan Pb (II) menunjukkan bahwa isolat memiliki kemampuan mengkompleks Pb (II). Hasil analisis spektra inframerah (IR) dan 1H-NMR diduga isolat F41.3 adalah senyawa 5,8,4’–trihidroksi-flavan.

FOTODEGRADASI FENOL DALAM LEMPUNG TERPILAR TIO2 (PHOTODEGRADATION OF PHENOL ON TIO2-PILLARED-KAOLINITE Imelda H Silalahi; Nelly Wahyuni; Irwan Irwan
Indonesian Journal of Pure and Applied Chemistry Vol 3, No 2 (2020)
Publisher : Tanjungpura University

Photodegradation of phenol on TiO2-pillared-kaolinite was observed. Pillarization of kaolinite was conducted through intercalation of polyoxotitanium sol into clay suspension followed by calcination giving TiO2-kaolinite which showed an increase in specific surface area and total pore volume compared with the kaolinite. The analysis of XRD demonstrated no significant change on d-space of second order of kaolinite structure associated with 2q 26.61°, but diffractions with regard to 2q 25.3° and 48.0° interpreted for TiO2 anatase were seen on the diffractogram of TiO2-kaolinite. The significant decrease of phenol concentration was observed in the presence of both kaolinite and TiO2-kaolinite under UV illumination (hn ³ 365 nm) compare with the photoreaction without the kaolinite materials however the degradation rate of phenol on TiO2-kaolinite was faster than that on the kaolinite-only where 50% of phenol was consumed after 45 minutes of reaction. Kinetic study showed the photoreaction of phenol on TiO2-kaolinite follows the first order reaction with the reaction rate constant of 1.8 x 10-2 min-1.

EKSTRAKSI DAUN PELAWAN (Tristaniopsis merguensis)SEBAGAI ANTIOKSIDAN MENGGUNAKAN MICROWAVE ASSISTED EXTRACTION (MAE) Sito Enggiwanto; Fusfita Istiqomah; Kasro Daniati; Occa Roanisca; Robby Gus Mahardika
Indonesian Journal of Pure and Applied Chemistry Vol 1, No 2 (2018)
Publisher : Tanjungpura University

Indonesia is a country that produces a wealth of abundant biodiversity, one of which is a plant that is often cultivated the tree of Pelawan (Tristaniopsis merguensis). Pelawan trees are widely spread in Indonesia one of them found in the forests of the Bangka Belitung island. Therefore, this study aims to identify the secondary metabolites and testing antioxidants in leaf of pelawan extract by comparing methods of Microwave Assisted Extraction (MAE) with maceration method. The resistant leaf used in this study was obtained from Sempan, Bangka Belitung. The observation result shows that the use of MAE method can extract with faster time compared with maceration method. So the MAE method is more effective than the maceration method. The using of MAE method for 30 minutes obtained the highest yield percentage of 41.3% in ethanol solvent which is more effective than acetone solvent. Extraction by using 48 hour maceration yields is 28.985%. While the extraction with 30 minute maceration is 13.385%. Testing of antioxidant activity using Microwave Assisted Extraction (MAE) method on acetone solvent has the highest antioxidant activity than ethanol extract that is 9,501 μg/mL. The use of the MAE method is more efficient in extracting the leaves of Pelawan than the maceration method when viewed from the time and antioxidant activity.

KARAKTERISASI MINYAK ATSIRI DAUN UJUNG ATAP (Baeckea Frutesces L) DARI HUTAN DESA SUNGAI NANJUNG KABUPATEN KETAPANG KALBAR M Supandi; Muhammad Agus Wibowo; Titin Anita Zahara
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 2 (2019)
Publisher : Tanjungpura University

Ujung atap (Baeckea frutescens L) from Myrtaceae family is a woody shrub which leaves resemble a large evergreen tree found from Nanjung River Village, Ketapang Regency, West Kalimantan. The purpose of this study is to isolate and characterize essential oils of ujung atap. Insulation is used by the distillation method. The result showed rendement of ujung atap the essential oils are 0,91% (4 hours), 0,97% (6 hours) dan 1,12% (7 hours). Essential oils are tested physicochemistry properties and components of chemistry compound analyzed with GC-MS. The result showed density is 0,878 (room temperature), refractive index is 1,474 (28oC), optical rotation is +2,24(20oC), solubility in alcohol is 1:8 mL, acid number 1,253, dan ester number 3,829. The result of GC-MS showed 21 compound, with the main compound monoterpenes are α-pinene, β-pinene and 1,8 cineol.

KARAKTERISASI DAN UJI AKTIVITAS ASAP CAIR TERHADAP KANDUNGAN PROKSIMAT IKAN TERI (CHARACTERIZATION AND ACTIVITY OF LIQUID SMOKE ON PROXIMATE CONTENTS OF ACHOVY FISH) Nita Wahyu Pratama; Mega Sari J Sofiana; Anthoni B Aritonang
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 1 (2021)
Publisher : Tanjungpura University

Coconut shell liquid smoke has been made from coconut shells by pyrolysis method at a temperature of 150 °C for 4 hours. Liquid smoke purified by adsorption using activated charcoal. The test results showed that activated charcoal could bring down the conciseness to become odourless and the color of liquid smoke from dark chocolate to yellowish-brown. The composition of the liquid smoke compound was determined by using the Gas Chromatography-Mass Spectrophotometer (GC-MS) consisting of 33.60% methylamine-D2 and 31.14% acetic acid as the dominant compounds. A solution of liquid smoke in water (6.0% v / v) was used for activity testing to the content of proximate by immersing fresh anchovy at room temperature with closed conditions for seven days. The results of the proximate test observed as follows: the water content tended to decrease, the highest on day 1 (11.56%) and the lowest on the 7th day (7.38%), the ash content tends to increase, the highest on the 7th day (9, 76%) and the lowest on the 1st day (6.52%), the fat content tends to increase, the highest on the 7th day (20.19%) and the lowest on the 1st day (9.72%) and the protein content is an increase, namely the highest on the 7th day (14.02%) and the lowest on the 1st day (10.20%). The water content decrease caused the ash content was increased as an indication of an enhancement in mineral content in the anchovy sample. Likewise, the water content decrease caused the higher fat content. Based on the results, it can be concluded that the liquid smoke produced from coconut shells purified by the activated charcoal is very promising as a foodstuffs preservative.

KINETIKA DEGRADASI SELULOSA ASETAT DARI SABUT PINANG Intan Syahbanu; Annisa Anugraini; Husna Amalya Melati
Indonesian Journal of Pure and Applied Chemistry Vol 1, No 1 (2018)
Publisher : Tanjungpura University

Cellulose Acetate is a material with wide range in applications. Cellulose acetate may obtain from natural resources, such as areca fiber. Polymers should have uniform molecular weight for the applications and could be modify by ultrasonic waves. Ultrasonic treatment on polymer entangled with polymer degradation. In this research, degradation kinetics of cellulose acetate in acetone had been studied. Analysis was performed by determination of intrinsic viscosity in polymer solution system. Intrinsic viscosity was successfully obtained by fitting data using Huggins equation, indicate molecular interaction in polymer solution should not be neglected. Increasing in sonication time reducing the intrinsic viscosities as well as molecular size in solutions. Degradation rate constant and reaction order were obtained 5,975x10-3(g.mL-1)0,1.min-1 and 1,0616, respectively. Kinetics model was successful to determine the degradation rates of cellulose acetate on acetone by correlation coefficient (R2) at 0,966.

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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

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Ajuk Sapar

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ajuk.sapar@chemistry.untan.ac.id

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+6281282990575

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anthoni.b.aritonang@chemistry.untan.ac.id

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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University Jl. Prof. Dr. Hadari Nawawi, Pontianak, Kalimantan Barat, Indonesia

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INDONESIA