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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 124 Documents

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EKSTRAKK UMBI BAWANG DAYAK (Eleutherine palmifolia (L.) Merr.) SEBAGAI PEREDUKSI ION PERAK DALAM SINTESIS NANOPARTIKEL PERAK Normaningsih Rahayu; Gusrizal Gusrizal; Nurlina Nurlina
Indonesian Journal of Pure and Applied Chemistry Vol 3, No 3 (2020)
Publisher : Tanjungpura University

Silver nanoparticles (AgNPs) are one of the best plasmonic candidates that have been used in Surface Plasmon Resonance (SPR)-based nanosensors for the detection of metallic ions. In this research, AgNPs were prepared by the method using Eleutherine palmifolia (L.) Merr root ethanol extract. Silver nanoparticles were synthesized by reduction of silver nitrate with Eleutherine palmifolia (L.) Merr. Tuber extract (concentration of extract = 0,01%, pH = 11, volume ratio 1:1) in the boiling water bath for 90 minutes. The formation of silver nanoparticles was indicated by the appearance of yellow color and monitored using a UV-Visible spectrophotometer. The spectra showed the maximum peak at 401-405 nm. The resulted silver nanoparticles with the size of 10-20 nm were stable at least for 16 weeks.

SENYAWA GOLONGAN STEROID DARI DAUN ADAM HAWA (Rhoeo discolor (L,Her.) Hance) DAN UJI SUN PROTECTING FACTOR STEROID COMPOUND FROM ADAM HAWA (Rhoeo discolor (L,Her.) Hance) LEAVES AND SUN PROTECTING FACTOR TEST Anggelita Anggelita; Endah Sayekti; Lia Destiarti
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 2 (2021)
Publisher : Tanjungpura University

The isolation of steroid compounds from Adam Hawa leaves has been carried out through maceration, partition, separation, and purification. The relatively pure BF2 isolate was 7 mg amorphous and with a melting point of 158-1700C. Results of 1H-NMR spectrum analysis with CDCl3 solvent, 500 MHz δH: 7,53 (d, J= 5,4 Hz, = C-H ); 7,72 (d, J= 5,7 Hz, = C-H); 5,35 (1H, d, J=5,15 Hz, =C-H); 3,51 (1H, m, Ar-CH), 0,93 (d, J= 6,2 Hz, 3H), 0,86 (3H, s), 0,84 (3H, s), 0,81 (3H, m), 0,84 (d, J= 5,2 Hz, 3H). The 1H-NMR spectrum of isolate BF2 similar to the 1H-NMR spectrum of ergosterol peroxide and ergosterol. So it is predicted that BF2 isolate has resembled structures with those compounds. In vitro sunscreen tests were performed on BF2 isolates and methanol extracts using a UV-Vis spectrometer. The SPF values of BF2 isolate and methanol extract at concentrations (ppm) of 120, 140, 160 and 180 respectively were 1.913; 1,684; 2252; 2483; and also 1,428; 1,655; 2,465; 1883. The results showed that BF2 isolate and methanol extract had weak activity as sunscreen

SINTESIS TiO2 TERDOPING Bi3+ DAN UJI AKTIVITAS FOTOKATALISIS ANTIBAKTERI E.coli DENGAN BANTUAN SINAR TAMPAK (SYNTHESIS OF Bi3+ DOPED TiO2 AND PHOTOCATALYSIS ACTIVITY TEST OF E.coli ANTIBACTERIA UNDER VISIBLE IRRADIATION) Annisa Furqonita; Anthoni B. Aritonang; M. Agus Wibowo
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 2 (2021)
Publisher : Tanjungpura University

The synthesis of Bi3+ doped TiO2 was carried out using the sol-gel method with the precursor solution of titanium tetraisopropoxide (TTiP). Bi3+ cation dopant is done to reduce the energy of the TiO2 band gap so that it can be active in the visible light region. The synthesized Bi(III) –TiO2 photocatalyst was characterized using DRS UV-Vis, FTIR, and EDX. The results of the DRS UV-Vis analysis showed that 1% Bi(III) –TiO2 photocatalyst had a bandgap energy of 2.79 eV or equivalent to a wavelength of 469.97 nm. Infrared spectra show that there is a unique absorption at the wave number 956,56 cm-1 which is the absorption of the vibration Bi-O-Ti group. Photocatalyst Bi(III) -TiO2 was then tested for antibacterial activity against E. coli in polluted water. The activity test was carried out using the turbidimetric method by UV-vis spectrophotometry. The results of the activity test for 120 minutes with the help of visible light showed that the photocatalyst Bi(III) –TiO21% had the best antibacterial activity. The decrease in the number of E. coli in the water reached 48.54%.

TOWARD QUALITY CONTROL OF BIOGAS PRODUCT IN INDONESIA: AN OVERVIEW Oman Zuas; Eka Mardika Handayani; Muhammad Rizky Mulyana; Melati Azizka Fajria; Harry Budiman; Ayu Hindayani; Arfan Sindhu Tistomo; Anthoni Batahan Aritonang; Nazarudin Nazarudin
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 2 (2021)
Publisher : Tanjungpura University

The quality control of the final product of biogas is essential for providing a maximum level of consumer’s satisfaction. The most important criteria for any biogas product are its regulatory compliance and safety. Based on a desk study of document and laboratory experiment, this paper overviews the development of infrastructure of quality to control the quality of biogas, aiming at summarising the experience, problems and demonstrating development status of quality infrastructure in Indonesia in the hope of providing references for the present condition. The discussion is made to cover issues related to biogas that are emphasized on three pillars of the infrastructure of quality in Indonesia, i.e., standardization, metrology, and conformity assessment. From the overview, the critical conclusion where understanding and continuing the development quality infrastructure of assuring the safety and quality of biogas remain essential.

RETRACTED: PRODUKSI DAN KARAKTERISASI BIOCHAR AMPAS TEBU(Saccharum officinarum Linn) PRODUCTION AND CHARATERIZATION OF BAGASSE BIOCHAR (Saccharum officinarum Linn) Suparnawati Suparnawati; Harlia Harlia; Warsidah Warsidah; Anthoni Batahan Aritonang
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 2 (2021)
Publisher : Tanjungpura University

This article has been retracted: please see IJoPAC Policy on Article Retraction (https://jurnal.untan.ac.id/index.php/IJoPAC/pages/view/PUBLICATIONETHICS). This article has been retracted at the request of the Editor. One of the stages of submitting a paper by the author for publication is ensuring that the paper has never been published in another publication. The use of data from other articles without including the source of the citation is an abuse of the scientific publishing system. We apologize to our readers that this was not detected during the submission process.

PRESISI DAN AKURASI KROMATOGRAFI GAS DALAM PENETAPAN KADAR ASAM PROPIONAT DALAM PRODUKSI BAKERI (PRECISION AND ACCURACY OF GAS CHROMATOGRAPHY FOR DETERMINATION OF PROPIONIC ACID LEVELS IN BAKERY PRODUCT) Nasril Fuad Hasan; Warsidah Warsidah; Gusrizal Gusrizal
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 2 (2021)
Publisher : Tanjungpura University

Percission and accurate gas chromatographic method for determination of propionic acid in bakery products was developed. Bakery productswere directly extraction with ethyl acetat and phosphoric acid used for acidic. The extract was injected directly to gas chromatographic using butyric acid as internal standard. Calibration curve propionic acid range 25 – 1000 µg/mL. Coefissien of variation (CV) rates for spiked bakery produtcs were 1,36% and 99,81% (range 96,32 – 103,61%) for accuracy at ± 1000 mg/kg propionic acid, Limit detection (LoD) and limit quantitation (LoQ) by this method were 333,6537 mg/Kg and 635,5818 mg/Kg. Burger, hot dog, and sandwich buns from a local factory at Pontianak were analyzed and respectively rates less than the limit permitted by Indonesian regulations.

AKTIVITAS ANTIBAKTERI DARI FUNGI ENDOFIT Caulerpa racemosa ASAL PERAIRAN PULAU LEMUKUTAN (ANTIBACTERIAL ACTIVITY FROM ENDOPHYTIC FUNGI Caulerpa racemosa ORIGIN IN LEMUKUTAN ISLAN WATERS) Melia Trianasta; Warsidah Warsidah; Mega Sari Juane Sofiana
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 3 (2021)
Publisher : Tanjungpura University

Green macroalgae Caulerpa racemosa from the waters of Lemukutan Island was isolated to obtain its endophyte fungi. Endophyte fungi were explored to determine their potential as antibacterial. Isolation of endophyte fungi was carried out by dilution method using PDA media. Endophyte fungi with different morphology were obtained as many as 4 isolates, named CRF1, CRF2, CRF3 and CRF4. Antibacterial activity testing was carried out by agar diffusion method. Endophyte fungi isolate CRF3 showed the best activity against Escherichia coli bacteria while CRF2 isolate showed the best activity against Staphylococcus aureus with inhibition zone diameters of 15.83 mm and 11.99 mm, respectively. Keywords:Endophyte Fungi, Caulerpa racemosa, Antibacterial, Lemukutan

A LOW-COST PAPER-BASED MICROFLUIDIC IMPEDIMETRIC DEVICEC FOR THE DETECTION OF WATER HARDNESS Migelhewa Nidarsha Kaumal; Niroodha Pitawela
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 3 (2021)
Publisher : Tanjungpura University

A microfluidic paper-based impedimetric device was developed as a water hardness sensor. This device is capable of performing the analysis with a sample volume of few microliters with no prior treatments. A phenol-formaldehyde graphene electrode modified with ethylenediaminetetraacetate was used as the working electrode. Ag pseudo reference and carbon electrodes were used to fabricate the device. Current simultaneous metal ion detection sensors are based on complex and expensive electrode setups. The proposed inexpensive, quick and portable device is capable of detecting Ca2+ and Mg2+ simultaneously. Electrode double layer-based charge transfer resistance and the maximum negative imaginary impedance produced a linear correlation with each metal ion concentration. The calculated limits of detection for Ca2+ and Mg2+ were 0.31 and 0.24 ppm, respectively. A set of samples containing Ca2+ and Mg2+ with a hardness of 2 ppm (as calcium carbonate) were used to test the device. The proposed tool is suitable as a semi-quantitative device for the determination of hardness in water.

SYNTHESIS OF Co(II)-TiO2/KAOLINITE AS A ANTIBACTERIAL Escherichia coli PHOTOCSINTESIS Co(II)-TiO2/KAOLIN SEBAGAI FOTOKATALIS ANTIBAKTERI Escherichia coli DENGAN BANTUAN SINAR TAMPAK (SYNTHESIS OF Co(II)-TiO2/KAOLINITE AS A ANTIBACTERIAL Escherichia coli PHOTOCATALYST UNDER VISIBLE LIGHT) Elyta Clarissa; Adhitiyawarman Adhitiyawarman; Anthoni B Aritonang
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 3 (2021)
Publisher : Tanjungpura University

Photocatalyst Co(II)-TiO2/kaolinite as a antibacterial E.coli has been successfully synthesized using sol-gel method. The purpose of this study was to determine the characteristics and Co(II)-TiO2/kaolinite photocatalyst activity as antibacterial E.coli under visible light. Synthesis of Co(II)-TiO2/kaolinite using TTIP as a precursor for Ti and CoCl2.6H2O as a precursor to Co(II) dopant. The doping process is carried out using the sol-gel method with the stages of hydrolysis, condensation, aging and calcination at a temperature of 450 ºC. The impregnation process on kaolinite was carried out using the wet impregnation method. The antibacterial activity test of E.coli under visible light was carried out using the turbidimetric method using a UV-Vis spectrophotometer at a wavelength of 600 nm. The activity test results showed that the Co(II)-TiO2 photocatalyst with a concentration of Co(II) dopant 3 %w/v had the best inhibition power reaching 35,47 %. The synthesized Co(II)-TiO2/kaolinite photocatalyst was analyzed using FTIR, XRD and UV-Vis DRS instruments. The results of FTIR analysis show that there is a shift in Ti-O absorption towards a smaller wave number which indicates that the Co(II) dopant has successfully entered the TiO2 structure. The XRD diffractogram showed that the Co(II)-TiO2/kaolinite photocatalyst had an anatse phase at 2q = 25,256º with a crystal size of 17-25 nm. UV-Vis DRS spectroscopic analysis showed a decrease in the band gap energy value from 3.35 eV to 1.69 eV.

KOMPOSISI UNSUR DAN MINERAL DALAM PASIR BESI, RESIDU BAUKSIT DI PT. INDONESIA CHEMICAL ALUMINA (ICA) (ELEMENTAL COMPOSITION AND MINERALS IN IRON SAND, BAUXITE RESIDUE AT PT. INDONESIA CHEMICAL ALUMINA (ICA) Imelda Hotmarisi Silalahi; Nikmatun Khasanah; Titin Anita Zaharah
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 3 (2021)
Publisher : Tanjungpura University

Iron sand is obtained from one of the waste treatments stages of bauxite residue called red mud, operated at PT. Indonesia Chemical Alumina (PT. ICA). Preliminary analysis of the sand indicates that the main element contained in the sand is iron with a percentage of up to 60% and titanium at 10%. This study aims to determine the elemental composition and mineral characteristics of sand that was separated magnetically from the iron sand. Magnetic separation was carried out in two stages, namely separation using a weak magnets and strong magnets. The separation resulted in approximately 71% of strong magnetic sand. The rest was separated using the strong magnet giving almost 70% of weak magnetic sand while the residue is non-magnetic sand. The weak magnetic sand was analyzed using XRF and XRD to determine elemental composition as well as the type of mineral contained in the material. Elemental analysis showed that the weak magnetic sand contains 66.331% of iron, 13,120% of silicone, 9.216% of aluminum and 7.040% of titanium. The XRD analysis presented that crystalline phase in the sand consists of ilmenite, hematite, goethite, quartz and rutile.

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Contact Name Ajuk Sapar

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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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Contact Name
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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Kota pontianak,

Kalimantan barat

INDONESIA