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Indonesian Journal of Chemistry

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Published by Universitas Gadjah Mada

ISSN : 14119420 EISSN : 24601578 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry

Indonesian Journal of Chemistry is an International, peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry including applied chemistry. The journal is accredited by The Ministry of Research, Technology and Higher Education (RISTEKDIKTI) No : 21/E/KPT/2018 (in First Rank) and indexed in Scopus since 2012. Since 2018 (Volume 18), Indonesian Journal of Chemistry publish four issues (numbers) annually (February, May, August and November).

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Articles 21 Documents

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Search results for , issue "Vol 17, No 1 (2017)" : 21 Documents clear

PAN-Immobilized PVC-NPOE Membrane for Environmentally Friendly Sensing of Cd(II) Ions Moersilah Moersilah; Dwi Siswanta; Roto Roto; Mudasir Mudasir
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

A simple, cheap and environmentally friendly analytical method of Cd(II) in the aqueous system has been developed by immobilization of 1-(2-pyridilazo)-2-naphtol (PAN) in poly vinyl chloride (PVC) matrix and nitrophenyl octyl ether (NPOE) as a plasticizer. Upon contact with Cd(II) in solution, the color of sensor membrane changes from dark yellow to dark red, which is due to the formation of Cd(II)–PAN complex. The best sensing results were obtained at pH 8.0 and λmax 558 nm. The dimension of the proposed sensor membrane was 0.8 cm x 2 cm with a thickness of 0.05 mm, the volume of sample was 2 mL with the Cd(II) concentration range of 0 – 1.2 ppm. The limit of detection of the method was found to be 0.432 + 0.104 ppm, which was reversible. The proposed methods have been applied in the determination of Cd(II) in water samples after addition of internal standard.

Application of Ion-Exchange Resin Column for Basic Development of Strontium-90/Yttrium-90 Generator for Preparation of Radiopharmaceutical Therapy Muchtaridi Muchtaridi; Elvan Kamal; Anas Subarnas; Abdul Mutalib
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

The aim of this study is to examine the possible use of ion-exchange resin on Dowex AG 50x8 in separating Y-90 from Sr-90 which then could be applied in the basic of manufacture of producing Sr-90/Y-90 generator for the production of radiopharmaceutical cancer therapy. The findings showed that a distributive coefficient of Sr-90 and Y-90 with HCl 6 N solvent showed that distributive coefficient of Sr-90 in cation-exchange resin on Dowex 50x8 was greater than Y-90. Y-90 in HCl 6 N solvent was more easily eluted, while Sr-90 was bound to resin.. In conclusion, resin on Dowex AG 50x8 with HCl 6 N elution solvent might be able to separate Y-90 from Sr-90 as the basis for Sr-90/Y-90 generator.

Antioxidant Activity of Syzygium polyanthum Extracts Mutia Devi Hidayati; Taslim Ersam; Kuniyoshi Shimizu; Sri Fatmawati
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

Antioxidant activities of Syzygium polyanthum leaves extracts (methanol, ethyl acetate, dichloromethane and n-hexane) were evaluated by using DPPH (2,2-diphenyl-2-picrylhydrazyl) and ABTS (2,2’-azinobis (3-ethylbenzothiazole-6-sulfonic acid) methods. The methanol extract showed the highest antioxidant activity of DPPH assay among extract with IC50 value of 44.35 mg/mL. In addition, methanol extract also showed the highest antioxidant activity of ABTS assay among extracts with IC50 value of 17.69 mg/mL. This study indicated that the methanol extract of S. polyanthum leaves is potential as antioxidant.

A Novel Spectrophotometric Method for Determination of Histamine Based on Its Complex Reaction with Ni(II) and Alizarin Red S Miftakhul Jannatin; Ganden Supriyanto; Pratiwi Pudjiastuti
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

The development of analytical methods of histamine using Ni (II) and alizarin red S reagents by UV-Vis spectrophotometry has been done. The objective of this research is to determine the ability of Ni(II) and alizarin red S to form color complex compound with histamine and it will be used to detect the presence of histamine qualitatively and quantitatively as well. Absorbance was measured at a maximum wavelength of 604 nm. In this method, it has been carried out optimization of analytical parameters such as the concentration of Ni(II), the concentration of alizarin red S, pH, and respond time. Analytical parameter optimization showed concentration of Ni(II) is 20 ppm, alizarin red S 75 ppm, pH 8, and a respond time of 15 minutes. Method validation indicated that the coefficient of variation, detection limit, and the limit of quantitation are 0.245%; 9.49 ppm; and 31.62 ppm respectively with a sensitivity of 0.0063/ppm and linearity of 0.99. Accuracy to histamine with a concentration of 50, 75, and 125 ppm are 105.87%, 101.06%, 97.21%, respectively.

Synthesis and In Vitro Evaluation of C-methylcalix[4]resorcinaryl octacinnamate and C-methylcalix[4]resorcinaryl octabenzoate as the Sunscreen Budiana I Gusti M. Ngurah; Jumina Jumina; Chairil Anwar; Sunardi Sunardi; Mustofa Mustofa
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

The present study was aimed to synthesize and evaluate sunscreen activity of C-methylcalix[4]resorcinaryl octacinnamate and C-methylcalix[4]resorcinaryl octabenzoate. The target compounds were synthesized in 2 steps. They were a synthesis of C-methylcalix[4]-resorcinarene via acid catalyzed the condensation of resorcinol and acetaldehyde by using HCl catalyst, followed by esterification using cinnamoyl chloride and benzoyl chloride. The characterization of the target compounds was performed by IR, 1H-NMR, 13C-NMR, and LC-MS spectrometers. The sunscreen activity test was conducted by spectroscopic method and MTT-assay. Commercial sunscreen p-amino benzoic acid (PABA) was used as a comparator to the MTT assay. The sunscreen activity test used spectroscopic showed that C-methylcalix[4]resorcinaryl octacinnamate and C-methylcalix[4]resorcinaryl octabenzoate can absorb the ultraviolet radiation between 280 and 320 nm (UV-B) with the maximum absorption at 290 nm (ε = 31.535 M-1 cm-1) and 282 nm (ε = 42.217 M-1 cm-1), respectively. The results of MTT-assay indicated that the IC50 of C-methylcalix[4]resorcinaryl octacinnamate, C-methylcalix[4]resorcinaryl octabenzoate and PABA are 12.006, 20.568 and 12.564 ppm, respectively, it means that the order of sunscreen activity is C-methylcalix-[4]resorcinaryl octacinnamate, PABA and C-methylcalix[4]resorcinaryl octabenzoate.

The Roles of Hydrazine and Ethylenediamine in Wet Synthesis of Cu Nanowire Harsojo Harsojo; Lutfi Ayu Puspita; Dedi Mardiansyah; Roto Roto; Kuwat Triyana
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

A wet synthesis Cu nanowire using CuNO3 as a precursor and hydrazine as a reduction agent and ethylene diamine as a polymer capping agent in excessive sodium hydroxide solution 15 M NaOH has been done. The study was done by varying the volume of hydrazine 0.15, 0.25 and 0.75 mL and ethylenediamine (EDA) (0.5, 1.5 and 0.25 mL) in a total volume of 100 mL, to investigate the roles of these two agents in forming the nanowire and was done at 60 °C at 60 RPM stirring speed. The study revealed that the wet synthesis could be used to produce nanowires in the length of micrometers with a diameter of about hundred nanometers. The best CuNW was obtained at volume EDA 1.5 mL at hydrazine volume 0.15 mL with length to diameter ratio was 120 ± 30. The roles of both hydrazine and the EDA in the process of making nanowires and nanoparticles were also discussed.

The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl4- from Aqueous Solution Sri Sudiono; Mustika Yuniarti; Dwi Siswanta; Eko Sri Kunarti; Triyono Triyono; Sri Juari Santosa
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

Humic acid (HA) extracted from peat soil according to the recommended procedure of the International Humic Substances Society (IHSS) has been tested to remove AuCl4- from aqueous solution. The removal was optimum at pH 2.0 and it was mainly dictated by attachment through hydrogen bonding to unionized carboxyl (–COOH) groups and reduction by the action of the hydroxyl (–OH) groups to gold (Au) metal. The removal of AuCl4- improved after HA was purified through repeated immersion and shaking in a mixed solution containing 0.1 M HCl and 0.3 M HF. When the purification led to the sharp decrease in ash content from 39.34 to 0.85% (w/w) and significant increase in both the –COOH and –OH contents from 3240 to 3487 mmol/kg and from 4260 to 4620 mmol/kg, respectively; the removal of AuCl4- improved from 0.105 to 0.133 mmol/g. This improvement of AuCl4- removal by the purified HA was accompanied by higher ability in reduction to Au metal. The attached AuCl4- on –COOH groups of both crude and purified HAs was qualitatively observed by the characterization result of FT-IR spectroscopy, while the presence of Au metal on the surface of those HAs was verified by the characterization result of XRD.

A Rapid and Simple High-Performance Liquid Chromatographic Method for Determination of Levofloxacin in Human Plasma Dion Notario; Sudibyo Martono; Zullies Ikawati; Arief Rahman Hakim; Fathul Jannah; Endang Lukitaningsih
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

A simple and rapid high-performance liquid chromatography method was developed and validated for quantifying LEV in human plasma. Chromatographic separation was performed under isocratic elution on a Luna Phenomenex® C18 (150 × 4.6 mm, 5 µm) column. The mobile phase was comprised of acetonitrile, methanol, and phosphate buffer 25 mM pH 3.0 (13:7:80 v/v/v) and pumped at a flow rate of 1.5 mL/min. Detection was performed by UV detector at a wavelength of 280 nm. Samples were pre-treated with acetonitrile followed by centrifugation, evaporation, and reconstitution step. The method proved linear (r = 0.995), sensitive (LLOQ and LOD was 1.8 and 0.6 µg/mL respectively), accurate (% error above LLOQ ≤ 12% and LLOQ ≤ 20%), precise (RSD ≤ 9%), robust in the ranges of 1.8-28.8 µg/mL, rapid (separation time not more than 10 min), and simple (use no organic additive in mobile phase). The method was showed reliable for quantifying LEV in human plasma.

Docking Sulochrin and Its Derivative as α-Glucosidase Inhibitors of Saccharomyces cerevisiae Wening Lestari; Rizna Triana Dewi; Leonardus Broto Sugeng Kardono; Arry Yanuar
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

Sulochrin is known to have an activity as inhibitors of the α-glucosidase enzyme. In this report interaction of sulochrin to the active site of the α-glucosidase enzyme from Saccharomyces cerevisiae was studied by docking method. The crystal structure of α-glucosidase from S. cerevisiae obtained from the homology method using α-glucosidase from S. cerevisiae (Swiss-Prot code P53341) as a target and crystal structure of isomaltase from S. cerevisiae (PDB code 3A4A) as a template. These studies show that sulochrin and sulochrin-I could be bound in the active site of α-glucosidase from S. cerevisiae through the formation of hydrogen bonds with Arg213, Asp215, Glu277, Asp352. Sulochrin-I has stability and inhibition of the α-glucosidase enzyme better than sulochrin. The iodine atom in the structure of sulochrin can increase the activity as an inhibitor of the α-glucosidase enzyme.

Optical Sensor for the Determination of Lead(II) Based On Immobilization of Dithizone onto Chitosan-Silica Membrane Yuspian Nur; Eti Rohaeti; Latifah Kosim Darusman
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

Optical sensor based on incorporation of dithizone and chitosan-silica for the determination of lead (II) ion has been conducted. The optical sensor was made by composite of chitosan and silica in the ratio 2:1. Sol gel technique was chosen to make the membrane because it has some advantages such as its low temperature and chemical reactivity. The sensor has a good selectivity at pH 5 with response times at ± 180 s. Linearity responses was obtained with concentration range from 0.2 to 1.1 ppm with r2 = 0.9921. Average of %RSD on precision and accuracy (%PK) test were 1.46 and 100.96%, respectively. Limit of detection (LOD) and limit of quantification (LOQ) were 0.11 ppm and 0.37 ppm, respectively

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