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VALIDASI METODE ANALISIS POLISIKLIK AROMATIK HIDROKARBON (PAH) DALAM SEDIMEN DI SEKITAR PANTAI MAKASSAR Syahrir, Muhammad; Aprilita, Nurul Hidayat; Nuryono, Nuryono
Jurnal Kimia Terapan Indonesia (Indonesian Journal of Applied Chemistry) Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

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Validation of  analysis  method of PAH have been done in marine sediment of Macassar Coast by Gas Chromatography (GC-FID). Validation of method include:  limit of detection (LoD), limit of quantification (LoQ) and linearity range. The results of validation method of 7 types PAHs (Naphtalene, Acenaphtene, Penanthrene, Fluoranthene, Pyrene, Benzo (a) Anthracene and perylene) give  a  linearity  range between 0.5 to 20 ppm with an average linearity approaches a value of 1. LoD for  Naphtalene; Acenaphthene; Penanthrene; Fluoranthene; Pyrene; Benzo (a) Anthracene; and Perylene are  3.541; 0.208; 1,736; 1.737; 1,738; 12.124; and 2,128 ppm, respectively. LoQ for Naphtalene; Acenaphthene; Penanthrene; Fluoranthene; Pyrene; Benzo (a) Anthracene; and Perylene are  11,803; 0.695; 5.786; 5.786; 5.788; 5.794; 7.0796 and 7.092 ppm, respectively. Limit of detection (LoD), limit of quantification (LoQ), linearity and linear range can be used to determine the concentration of PAH in sediment samples.Keywords: Validation Method, Concentration, PAH, Sediments
Penghilangan Interferensi Fe dan Mn dengan Ekstraksi Pelarut pada Penentuan Co dan Cu dalam Pirolusit Menggunakan Spektrometri Serapan Atom Pote, Lodowik Landi; Aprilita, Nurul Hidayat; Suratman, Adhitasari
Berkala Ilmiah MIPA Vol 23, No 2 (2013)
Publisher : FMIPA UGM

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Research on the removal of Fe and Mn interference by solvent extraction on the determination of Co and Cu in pyrolusite using atomic absorption spectrometry with an air-acetylene flame have been investigated. Dissolution of pyrolusite sample was done by wet destruction method with solution of aqua regia and HF in the ratio of 3:4 (v/v). Interference studies were carried out for the absorbance of Co and Cu with the addition of iron and manganese in the concentration range 100-1000 ug/mL for iron and 100-5000 ug/mL for manganese measured at the wavelength 240.7 nm and slit width 0.2 nm for Co and wavelength 324.7 nm and slit width 0.7 nm for Cu.The results showed that Fe at concentrations of 100-1000 ug/mL and Mn at the concentrations of 100­5000 ug/mL could interfere the absorbance of Co and Cu, i.e. increase the absorbance of Co and decrease the absorbance of Cu. The interference of Fe can be overcome by solvent extraction with methyl isobutyl ketone in 7 M HCl medium. The interference of Mn can be overcome by masking with 0.10 M EDTA, then Co and Cu were extracted into chloroform by complexing them with sodium diethyldithiocarbamate at pH 2. The content of Fe and Mn in the pyrolusite measured by AAS were 67.35±0.61 mg/g and 545.00±6.25 mg/g, respectively. The content of Co and Cu before extraction were 773.33±25.17 ug/g and 2166.67±101.04 ug/g, respectively and after extraction were 487.18±11.10 ug/g and 2733.33±80.36 ug/g, respectively. These results have high precision with relative standard deviation (RSD) value of each elements less than 5%.
Pengaruh Ion Pb(Ii) Dan Ion Cd(Ii) Terhadap Efektivitas Fotoreduksi Ion Hg(Ii) Yang Terkatalisis Tio2 Novi, Cory; Wahyuni, Endang Tri; Aprilita, Nurul Hidayat
Berkala Ilmiah MIPA Vol 23, No 1 (2013)
Publisher : FMIPA UGM

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Pada penelitian ini telah dipelajari pengaruh ion Pb(II) dan Cd(II) pada konsentrasi terhadap efektivitas fotoreduksi ion Hg(II) yang terkatalisis TiO2. Proses fotoreduksi dilakukan dengan menyinari campuran yang terdiri dari larutan ion Hg(II) dan serbuk fotokatalis TiO2 dengan dan tanpa adanya ion Pb(II) maupun ion Cd(II), dalam reaktor yang dilengkapi dengan lampu UV. Kondisi proses fotoreduksi adalah 50 mL larutan ion Hg(II) 5 ppm, ion Pb(II) dan Cd(II) dengan konsentrasi yang bervariasi, TiO2 seberat 15 mg, pH larutan 4 dan waktu reaksi selama 24 jam. Jumlah Hg(II) yang tereduksi dihitung berdasarkan selisih antara konsentrasi ion Hg(II) awal dengan konsentrasi ion Hg(II) sisa dalam larutan setelah proses fotoreduksi. Konsentrasi Hg(II) sisa ditentukan  dengan metode Spektrofotometri Serapan Atom teknik pembangkit uap dingin atau Cold Vapor Atomic Absorption Spectrophotometric  method (CV-AAS). Hasil penelitian menunjukkan efektivitas fotoreduksi ion Hg(II) terkatalisis TiO2 dengan adanya ion Pb(II) mengalami peningkatan seiring dengan kenaikan konsentrasi ion Pb(II) yaitu dari 80,8% menjadi 98,92%, hal ini terjadi karena adanya efek sinergi. Sebaliknya fotoreduksi ion Hg(II) dengan adanya penambahan ion Cd(II) dengan konsentrasi yang semakin besar menjadi berkurang yaitu dari 80,8% menjadi 33,32% disebabkan terjadi kompetisi adsorpsi.
THE INFLUENCE OF OXALIC AND MALONIC ACIDS ON THE DEGREE OF Cu(II) PHOTOREDUCTION CATALYZED BY TIO2 Wahyuni, Endang Tri; Aprilita, Nurul Hidayat; Hayu, An Nissa F.; Nurhayati, Siti
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 15, No 1 (2008)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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The influence of oxalic and malonic acids on the effectiveness of Cu(ll) photoreduction catalyzed by TiO, has been studied. Photoreduction was carried out by a batch system in a closed reactor equipped by UV lamp. The results of the research show that the addition of TiO, photocatalyst can enhance Cu(ll) photocatalytic reduction, which may be initiated and/or accompanied by adsorption of Cu(ll) ion on the TiO, surface. The presence of both oxalic and malonic acids can improve of the Cu(ll) photoreduction, and the improvement is observed as the acid concentrations increase. It is also found that the effect of malonic acid in gaining Cu(ll) photoreduction is stronger than oxalic is, which are from around 20% into about 55% and that of into aroun d 35%, respectively. The roles of the acids on the enhancement of the photoreduction are OH radical attachment and electron donation.
KAJIAN SPEKTRA FTIR PADA MEMBRAN KOPOLI (EUGENOL-DIVINILBENZENA), CO-EDVB SEBAGAI SENYAWA PEMBAWA UNTUK TRANSPOR FENOL Kiswandono, Agung Abadi; Girsang, Ermi; Pulungan, Ahmad Nasir; Sihombing, Juniva Laila; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari; Hayashita, Takashi
Prosiding SNPS (Seminar Nasional Pendidikan Sains) 2015: Prosiding SNPS (Seminar Nasional Pendidikan Sains)
Publisher : Universitas Sebelas Maret Surakarta

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Abstract

Telah dilakukan kajian transpor fenol melalui membran berbasis senyawa divinil benzena (DVB)tertaut silang dengan metode PIM.Kajian transpor fenol ini menggunakan chamber sebagai alat transpor yang memisahkan fasa sumber dan fasa penerima. Beberapa evaluasi yang mempengaruhi transpor menggunakan membran PIMtelah dilakukan diantaranya adalah uji stabilitas membran, umur membrandan pemakaian berulang kemudian membran PIM sebelum dan setelah transpor dikarakterisasi menggunakan FTIR. Hasil penelitian menunjukkan bahwa membran PIM yang mengandung senyawa tertaut silang co-EDVB ini, kecepatan pengadukan, jenis agen tertaut silang, konsentrasi plasticizer dan garam NaNO3 berpengaruh terhadap hilangnya komponen penyusun membran (ML loss). Berdasarkan hasil FT-IR, didapatkan bahwa membran yang mengandung senyawa pembawa dienaini, komponen penyusun membran yang hilang didominasi oleh senyawa pembawanya sedangkan indikasi hilangnya komponen penyusun membran dapat terlihat pada hasil FT-IR setelah digunakan untuk transpor, yakni hilangnya puncak ‒OH pada spektra FT-IR.
Photoreduction of Cr(VI) Catalyzed by TiO2-Lignin Yuniar, Yuniar; Wahyuni, Endang Tri; Aprilita, Nurul Hidayat
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 1 (2017): February 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

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In order to increase  the  activity of TiO2 photocatalyst, preparation and characterization of TiO2-lignin and its activity on Cr(VI) photoreduction have been carried out. TiO2-lignin was prepared by mixing TiO2 powder with lignin powder  in water-ethanol followed by stirring for 24 h and calcination at 400°C. The crystal structure characterizations were performed by X-ray diffraction (XRD), Lignin was identified using FT-IR whereas photoreduction of Cr(VI) was conducted in a batch reactor. The effect of TiO2 content on TiO2-lignin, irradiation time, weight of photocatalyst and initial concentration of Cr(VI) were studied to obtain effectiveness of photoreduction. Activity of TiO2-lignin on the photoreduction of Cr(VI) showed higher result than TiO2. The increased of TiO2 content in TiO2-lignin result in higher Cr(VI) photoreduction and gave maximum yield at mass ratio of TiO2/lignin 2:1. The irradiation time, weight of TiO2-lignin photocatalyst and initial concentration of Cr(VI) obtained for maximum Cr(VI) photoreduction are 40 h, 50 mg and 1 mg/L respectively which reduced Cr(VI) by 81.44%. Keywords: TiO2-lignin, Cr(VI) ion, photoreduction
Validasi Metode Analisis Multiresidu Pestisida Organoklor dalam Salak Menggunakan Kromatografi Gas-Detektor Penangkap Elektron Raharjo, Tri Joko; Sutriyanto, Bambang; Anugrahwati, Mai; Aprilita, Nurul Hidayat
Agritech Vol 33, No 2 (2013)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

Validation of methods is a key step in the accreditation process of the method. Validation of organoklor pesticide residues method in snakefruit based on the method recommended by FAO-WHO, conducted in LPPT-UGM reported in this study. Snake fruit was homogenized, extracted using toluene/2-propanol (2:1), cleaned up using activated carbon and Celite 545, followed by analysis using gas chromatography-electron capture detector. Validation covered specificity and selectivity, limits of detection and quantification, linear range, precision and accuracy. Validation results showed good specificity and selectivity shown by the inter-peak chromatogram resolution greater than 1.5. Limits of detection and quantification for heptaklor, endosulfan, dieldrin and p, p-DDT were 0.002 and 0.006, 0.5 and 1.7; 0.0006 and 0.002, as well as 0.014 and 0.047 ppm respectively. The linear range for heptaklor, endosulfan, dieldrin, and p,p-DDT were 0.0017 to 2 ppm, 0.165 to 2 ppm, 0.023 to 2 ppm and 0.229 to 2 ppm, respectively. Precision methods meet the acceptance of Horwitz RSD value less than 12.78% at a concentration of 0.3 ppm. Accuracy is indicated by recovery, for each pesticide in the range of 80-110% acceptance at a concentration of 0.1 ppm. Analysis of organochlorine pesticides in three commercial snakefruit samples showed no pesticide residues at concentrations higher than the detection limit.ASBTRAKValidasi metode merupakan tahap kunci dalam proses akreditasi suatu metode. Validasi metode uji residu pestisida organoklor dalam salak berdasarkan metode yang direkomendasikan FAO-WHO, di LPPT-UGM dilaporkan pada penelitian ini. Buah salak dihomogenisasi, diekstraksi menggunakan toluen/2-propanol (2:1), clean up menggunakan karbon aktif dan Celite 545, dilanjutkan analisis menggunakan kromatografi gas-detektor penangkap elektron. Validasi mencakup spesifisitas dan selektivitas, batas deteksi dan kuantifikasi, range linier, presisi serta akurasi. Hasil validasi menunjukkan spesifisitas dan selektivitas yang baik ditunjukkan dengan resolusi antar puncak kromatogram lebih besar dari 1,5. Batas deteksi dan batas kuantifikasi untuk heptaklor, endosulfan, dieldrin dan p,p-DDT secara berturut-turut adalah 0,002 dan 0,006; 0,5 dan 1,7; 0,0006 dan 0,002; serta 0,014 dan 0,047 ppm. Range linier untuk heptaklor adalah 0,0017-2 ppm, endosulfan 0,165-2 ppm, dieldrin 0,023-2 ppm dan p,p-DDT 0,229-2 ppm. Presisi metode memenuhi batas keberterimaan Horwitz dengan nilai RSD lebih kecil dari 12,78% pada konsentrasi 0,3 ppm. Akurasi ditunjukkan dengan recovery, untuk tiap pestisida masuk dalam rentang keberterimaan 80-110% pada konsentrasi 0,1 ppm. Analisis pestisida organoklorin pada 3 sampel salak komersial menunjukkan tidak adanya residu pestisida dengan konsentrasi lebih tinggi dari batas deteksi.
ADSORPTION CHARACTERISTIC OF IRON ONTO POLY[EUGENOL-CO-(DIVINYL BENZENE)] FROM AQUEOUS SOLUTION Silvianti, Fitrilia; Siswanta, Dwi; Aprilita, Nurul Hidayat; Kiswandono, Agung Abadi
Jurnal Natural Volume 17, Number 2, September 2017
Publisher : Syiah Kuala University

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Abstract

A study on the adsorption characteristic of Iron onto Poly[eugenol-co-(divinyl benzene)] (EDVB) from aqueous solution has been conducted. EDVB was produced and characterized by using FTIR spectroscopy. The adsorption was studied by a batch method by considering the factors affecting the adsorption such as initial metal ion concentration, adsorption selectivity, and mechanism of adsorption using a sequential desorption method. The adsorption of Iron onto EDVB followed a pseudo-2 order kinetics model with the rate constant of 0,144 L2 mmol-1 min-1. The adsorption isotherm was studied with Tempkin, Langmuir and Freundlich models. The adsorption capacity (Qmax) obtained by Langmuir isotherms was 250mg.L-1 while the equilibrium value was 0.8 Lmg-1. A competitive adsorption study showed that EDVB is adsorbed selectively towards Iron rather than Chromium, Coppers and Cadmium ions. 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Evaluation of Phenol Transport Using Polymer Inclusion Membrane (PIM) with Polyeugenol as a Carrier Febriasari, Arifina; Siswanta, Dwi; Kiswandono, Agung Abadi; Aprilita, Nurul Hidayat
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 2 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

A recovery study of phenol with Polymer Inclusion Membranes (PIMs) needs to be evaluated to determine values of transport kinetic parameter, level of stability, and selectivity of the membrane. This paper describes results of the evaluation of phenol transport using PIMs with polyeugenol as a carrier. PIMs were made by mixing polyeugenol, dibenzylether, and polyvinylchloride in a solvent (tetrahydrofuran) then printed in a container with diameter 4.5 cm and allowed to vaporize for 72 hours. Further evaluation studies are conducted at pH 4.5 with various parameters, among of them are various times that were taken to identify parameters of the transport kinetics of phenol, membrane stability, characterization, and testing of membrane selectivity by comparing transport of phenol with another compound, in this study chromium is used. This study results in calculation of values of transport kinetics of membrane permeability obtained at 8.8 x 10-5 m/s, flux value of 9.512 x 10-4 g/m2s, and diffusion coefficient of 3.826 x 10-11 m2/s. Repeating use over three times, 48 hours, indicates reduction in power of phenol transport by 70.81%. While selectivity test indicates that membrane is used more selectively against phenol than chromium metal. Based on study results, phenol transport effectiveness using PIM with polyeugenol as carrier is 91.4% in optimum condition.
EXTENDING THE LIFE TIME OF POLYMER INCLUSION MEMBRANE CONTAINING COPOLY(EUGENOL-DVB) AS CARRIER FOR PHENOL TRANSPORT Kiswandono, Agung Abadi; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari; Hayashita, Takashi
Indonesian Journal of Chemistry Vol 13, No 3 (2013)
Publisher : Universitas Gadjah Mada

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Abstract

A study of phenol transport was conducted in correlation to the evaluation of copoly(eugenol-divinylbenzene, DVB) as carrier using polymer inclusion membrane (PIM) method. The performance of copoly(eugenol-DVB) was observed based on the parameters of Membrane Liquid (ML) loss. Some variations, including the effect of plasticizer concentration, stirring speed, and measurement of lifetime of the membrane, were studied. Related to the lifetime, the effect of the concentration of NaNO3 salt was also studied. The tensile strength of membrane before and after the transport was measured and their morphology was characterized using SEM (Scanning Electron Microscope). Results of the study indicate that the value of the tensile strength of the membrane after the transport was lower than that before the transport. The lifetime of the membrane was not only depending on the capacity of the membrane in restraining ML loss, but also on the concentration of salt that was added to the solution of source phase. In addition, the lifetime of the membrane had correlation to the number of ML loss, i.e. the addition of salt lead to lower amount of ML loss and gave longer lifetime. With the addition of 0.1 M NaNO3, the lifetime of the membrane extended to 62 days, which is longer than the lifetime without the addition of NaO3 which was only 7 days.