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All Journal VALENSI Jurnal Penelitian Saintek Jurnal Natur Indonesia Alchemy : Journal of Chemistry Jurnal Ilmu Kimia Universitas Brawijaya Natural B The Journal of Pure and Applied Chemistry Research SEMIRATA 2015 Jurnal Fisika FLUX ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Jurnal Otomasi Kontrol dan Instrumentasi Chemistry Indonesian Journal of Chemical Research Indonesian Journal of Chemical Analysis (IJCA) Molekul: Jurnal Ilmiah Kimia Jurnal Jejaring Matematika dan Sains Bubungan Tinggi: Jurnal Pengabdian Masyarakat Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Makara Journal of Science

Ani Mulyasuryani

Universitas Brawijaya

Author-ID : 324761

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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Kinerja Biosensor Konduktometri Berbasis (Screen Printed Carbon Electrode) SPCE––Kitosan untuk Deteksi Diazinon, Malation, Klorpirifos dan Profenofos Nuzulul Kurniawan Isvani; Ani Mulyasuryani; Sasangka Prasetyawan
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 1, No. 2, November 2015
Publisher : Syarif Hidayatullah State Islamic University

The performance of biosensor is based on the hydrolysis reaction of organophosphorus compounds catalyzed by organophosphate hydrolase (OPH), produce H+ and the other ionic species that increase conductance on the surface of electrode. In this research, OPH was immobilized by crosslinking on chitosan–glutaraldehyde membrane on the (Screen Printed Carbon Electrode) SPCE surface. Measurements were carried out at the range concentration 0 to 3.0 ppm of organophosphate, the range of pH 7.0 to 9.0 and 5–25 mL of enzyme. The result showed that optimum performances were obtained at 25 mL of OPH, pH 8.5, with the sensitivity for dizinon, malathion, chlorpirifos and profenofos is 1.353 mS/ppm, 1.270 mS/ppm, 1.230 mS/ppm dan 1.77 mS/ppm respectively and 0.97; 1.03; 0.98; 0.97 of LOD. DOI :http://dx.doi.org/10.15408/jkv.v0i0.3156.

Penentuan Hidrokuinon dalam Sampel Krim Pemutih Wajah secara Voltammetri Menggunakan Screen Printed Carbon Electrode (SPCE) Ani Mulyasuryani; Alfita Savitri
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 1, No. 2, November 2015
Publisher : Syarif Hidayatullah State Islamic University

Hydroquinone in whitening face cream has been banned since 2008, but is still found facial bleaching creams containing hydroquinone. Therefore, in this study have been developed voltammetric method for the determination hydroquinone in face whitening cream. This study has been carried out optimization of pH and measurement conditions. Optimizationof pH has been done in cyclic voltammetry, while the optimization of measurement carried out by differential pulse voltammetry. In this study, using a screen printed carbon electrode with a three electrode system. The results showed that the increase in pH causes a decrease in the anodic peak potential (Epa) of hydroquinone. The optimum conditions resulted at pH 2 in which the anodic current (Ipa) is the highest. The optimum condition resulted at high pulse 200 mV and scan rate at 15 mV/sec. The linear regression concentration is 1-100 μM, limit of detection is 0.015 μM and sensitivity is 0.0652 μM/µA. The results showed that the concentration of hydroquinone in the face whitening cream samples ranged from 0 to 0.02%DOI :http://dx.doi.org/10.15408/jkv.v0i0.3145.

Optimization of Flow Injection (FI) – Spectrophotometry for Hydroquinone Analysis Muhammad Iqbal Fahmi; Hermin Sulistyarti; Ani Mulyasuryani; Adam Wiryawan
The Journal of Pure and Applied Chemistry Research Vol 8, No 1 (2019): Edition January-April 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.01.445

Hydroquinone is one of the phenolic compounds used in various cosmetic products for skin lightening as it can inhibit tyrosinase enzyme in producing melanin. However, hydroquinone is classified as a toxic compound, therefore, several countries such as Africa, Canada, and Indonesia prohibits hydroquinone usage in cosmetics. This research was focused on the development of a method for hydroquinone analysis using flow injection (FI) combined with spectrophotometry based on the reaction of hydroquinone with phloroglucinol in alkaline condition producing orange complex detected at 493 nm. The FI method was optimized based on operational factors and chemical factors in order to achieve sensitivity. The maximum sensitivity of FI method was achieved under operational condition of 100 μL sample volume, 100 cm mixing coil 1, 50 cm mixing coil 2 and 2.8 mL/min with the chemical condition of 0.005 mol/L NaOH and 0.001 mol/L phloroglucinol. Under these optimum conditions, the proposed method showed linearity in the range concentration of 2 – 80 mg/L and the method was applied to cosmetic sample with acceptable recovery

The Development of Diazinon Sensors using Polyvinyl Alcohol (PVA) Membrane CuO on Surface Screen-Printed Carbon Electrode (SPCE) as a Receptor Anisa Resti; Ani Mulyasuryani; Diah Mardiana
The Journal of Pure and Applied Chemistry Research Vol 8, No 2 (2019): Edition May-August 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.02.468

The development of Diazinon sensor has been studied using polyvinyl alcohol (PVA-CuO membrane on the surface of the screen-printed carbon electrode (SPCE) as a receptor. The membrane used consisted of polyvinyl alcohol (PVA) 5% (w/v), citric acid 5% (w/v), glutaraldehyde 4% (v/v), Diazinon solution 40 ppm (v/v), and CuO 5% (w/v). This study established the effect of Diazinon at 0.01,0.02 and 0.03 (w/w). besides, the concentration of CuO was 0.5 and 1 (w/w). Signal measurements were carried out in the concentration range of the Diazinon 10-12 - 10-5 M solution in Britton-Robinson buffer at pH 2 - 5. Besides, the influence of the electrolyte type was studied using HCl pH 4, 10-5 M KCl, pH 3 phosphate, and phosphate-KCl pH 3 buffers. The results of the Diazinon sensor characterization showed that the highest sensitivity was obtained at 42 mV/decade with a response time of 180 seconds.

Extraction of Pb2+ using Silica from Rice Husks Ash (RHA) – Chitosan as Solid Phase Hanandayu Widwiastuti; Ani Mulyasuryani; Akhmad Sabarudin
The Journal of Pure and Applied Chemistry Research Vol 2, No 1 (2013)
Publisher : Chemistry Department, The University of Brawijaya

The existence of lead (Pb) compounds in waters can be caused of waste pollution from industrial activities such as dye and battery industries. Lead has toxic characteristic and is able to causing deseases. The levels of Cr(VI) can be decreased by methods such as electroplating, oxidation, reduction, and membrane separation. But this methods require high cost and produce a lot of waste. Furthermore, those methods cannot determine the small concentration of Pb2+. Therefore, solid phase extraction is used because it’s a simple method and can be used to preconcentrate Pb2+ ion.The aim of this study is to create solid phase from nature material as an alternative method to determine Pb2+ in water samples. The solid phase is silica from rice husks ash (RHA) that was modified using chitosan. To achieve that aim, the optimization of silica : chitosan composition was done. The influence of Pb2+ concentration and citric acid concentration was studied to obtain optimum recovery of Pb2+. Interaction between Pb2+ ion and solid phase silica – chitosan could be estimated based on the result.The result showed the optimum composition of silica : chitosan is 65% silica : 35% chitosan with Cation Exchange Capacity (CEC) 0.00455 mek/g. Mass Adsorbed Pb2+for 1 g silica : chitosan 65% is 9.715 mg/g. Optimum recovery of Pb2+ on solid phase extraction is reached at concentration of Pb2+ 10 ppm and citric acid concentration 0.05 M (88.25 % and 81.18 %). This result showed that solid phase extraction using silica – chitosan can be used as an alternative method to determine Pb2+ in water.

Determination of Hydroquinone in a Square Wave Voltammetry based on Screen Printed Carbon Electrode Alfita Safitri; Ani Mulyasuryani; Rachmat Triandi Tjahjanto
The Journal of Pure and Applied Chemistry Research Vol 4, No 1 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Hydroquinone is a phenolic compound are often used extensively in the cosmetics industry as whitening agent. This compound is very toxic and their use should be monitored. Due to the impact of hydroquinone, the use of hydroquinone restricted by BPOM (Food and Drug Regulatory Department in Indonesia) maximum by 0.02%. The aim of this study was to establish a new simple sensitive voltammetry method for determination of hydroquinone using screen printed carbon electrode (spce). In this study, linear concentration range, limit of detection, sensitivity and accuracy were investigated. Before the determination of parameters analysis, the method require the optimization of method parameters such as frequency and pulse height. This study were showed that the measurement of hydroquinone with square wave voltammetry method has linear concentration range 1 - 100µM, limit of detection 23.4µM, sensitivity 0.075µM/µA and accuracy 0.9969. The proposed method was succesfully applied in whitening cream cosmetic samples with good enough results.

Development of Chlorpyrifos Sensor Using Molecularly Imprinted Polymer (MIP) Polyvinyl Alcohol (PVA)-Fe3O4 as Receptor Afifah Muhimmatul Mustaghfiroh; Ani Mulyasuryani; Ulfa Andayani
The Journal of Pure and Applied Chemistry Research Vol 8, No 1 (2019): Edition January-April 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.01.441

Development of a chemical sensor to detect chlorpyrifos has been carried out using a molecularly imprinted polymer (MIP) polyvinyl alcohol (PVA)-Fe3O4 as a membrane receptor. The MIP-Fe3O4 receptor is composed of polyvinyl alcohol (PVA) polymer, glutaraldehyde crosslinking reagent, citric acid catalyst, chlorpyrifos template, and Fe3O4. The MIP-Fe3O4 receptor is coated on the working surface of the screen-printed carbon electrode (SPCE) with a size of 1.5 x 3 mm2. In this study, the effect of adding concentrations of chlorpyrifos and citric acid into membrane receptor was studied. The chlorpyrifos concentrations applied were 0.05, 0.1, 0.5 and 1% (w/w) and the concentrations of citric acid were 9.2, 16.8 and 23.3% (w/w). Sensor performance is also influenced by pH and type of electrolyte. The best sensitivity of the sensor is produced in the concentration range of 10-13 - 10-6 M at 24 mV/decade with a response time of 150 seconds.

Modification of Screen Printed Carbon Electrode (SPCE) with Polypyrrole (Ppy)-SiO2 for Phenol Determination Erasti Pratiwi; Ani Mulyasuryani; Akhmad Sabarudin
The Journal of Pure and Applied Chemistry Research Vol 7, No 1 (2018): Edition January-April 2018
Publisher : Chemistry Department, The University of Brawijaya

Electrode modification on screen printed carbon electrode (SPCE) with polypyrrole (Ppy)-SiO2 was done by electropolymerization. Polypyrrole (Ppy)-SiO2 was used for phenol determination. The analysis of this material was done by using Scanning Electron Microscopy (SEM), cyclic voltammetry method and differential pulse voltammetry. In a cyclic voltammetry analysis, we used potential range of -1 to 1 V with Ag/AgCl comparator electrode at scan rate of 100 mV/sec, while in differential pulse voltammetry method the potential range was 0 to 1 V toward Ag/AgCl, the scan rate of 50 mV/sec, the pulse rate is 0,2 V and the pulse width is 50 ms. From the analysis result with SEM, cyclic voltammetry and differential pulse voltammetry method, Polypyrrole (Ppy) -SiO2 is the best material and can be used as phenol measurement.

POTENTIOMETRIC BASED LEAD SENSOR TO DETECT THE LEVELS OF LEAD IN BLOOD Eka Novitasari; Ayu Rahayu Anggraeni; - Muhiroh; Mokhammad W. Dahlan; Ani Mulyasuryani
Jurnal Penelitian Saintek Vol 21, No 1: April 2016
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This study was aimed at determining the optimal conditions of lead sensor in the development of ion lead sensor to perform the optimization of several parameters such as the number of ionophores and membrane thickness. In this study, a lead sensor based on lead selective electrode was developed. The electrode was modiﬁ ed by adding lead sulﬁ de in chitosan membran as an active agent (ionophores) and superimposed on the surface of SPCE. The amounts of PbS added in chitosan solution were 0.5%, 1%, 1.5%, 2%, and 2.5% (w/v). The thickness of membrane used were 15 µm, 20 µm, 45 µm, and 75 µm. The sensors were tested in standard solution at concentration 10 -8 M to 10 M and at pH 2, 3, 4, and 5. Lead sensor has optimum performance on PbS 1.5%, thickness of membrane on 15 µm and pH 4. The Nernst factor obtained was 23.45 mV/decade with the solution concentration range 0.032 ppm to 0.322 ppm.-1

Perbandingan Metode Potensiometri dan Spektrofotometri pada Penentuan Formalin Dewi Umaningrum; Radna Nurmasari; Maria Dewi Astuti; Ani Mulyasuryani; Diah Mardiana
Jurnal Fisika FLUX Vol 1, No 1 (2019): Jurnal Fisika Flux Edisi Khusus Januari 2019
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v1i1.6148

Penelitian tentang penentuan formalin menggunakan metode potensiometri dan spektrofotometri telah dilakukan. Tujuan dari penelitian ini adalah untuk membandingkan hasil pengukuran kadar formalin antara metode potensiometri menggunakan sensor berbasis Screen Printed Carbon Electrode (SPCE) dengan metode standar spektrofotometri. Metode penelitian diawali dengan membuat sensor formalin yang digunakan untuk mengukur kadar formalin menggunakan selulosa asetat sebagai ionofor. Tahap berikutnya adalah mengukur kadar formalin sampel menggunakan sensor dan metode standar spektrofotometri. Hasil pengukuran kadar formalin kemudian dibandingkan diantara kedua metode tersebut. Hasil penelitian menunjukkan bahwa pada penentuan formalin antara kedua metode tersebut tidak menunjukkan beda nyata.

Co-Authors - Muhiroh Adam Wiryawan Adam Wiryawan Afifah Muhimmatul Mustaghfiroh Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Akhmad Sabarudin Alfita Safitri Alfita Savitri Anisa Resti Anna Roosdiana Arie Srihardyastutie Arumdati, Rara Aulia Asnaili Alfi Nurillah Attasith Parnsubsakul Ayu Rahayu Anggraeni Azizah, Alfi Bambang Ismuyanto Barlah Rumhayati Barlah Rumhayati Barlah Rumhayati Chandrawati Cahyani Danar Purwonugroho Dewi Umaningrum Dewi, Latifah Tribuana Diah Mardiana Diah Mardiana Diah Mardiana Dian Nur Fajariati Didik Pramana Dwi Oktavianti Eka Krisnaniningrum, Elvian Eka Novitasari Elvian Eka Krisnaniningrum Elvian Eka Krisnaniningrum Enggar Dwi Prasetya, Desta Erasti Pratiwi Erica Marista Rosida Hanandayu Widwiastuti Hasanuddin Hasanuddin Helmi Auliyah Istiqomah Hermin Sulistyarti Ika Diah Safitri Intan Frina Utamiyanti Isvani, Nuzulul Kurniawan Khairunnisa, Alda Khoirul Ngibad Krisnaniningrum, Elvian Eka Layta Dinira Mardhatillah Mardhatillah Maria Dewi Astuti Moftah Ali Mokhammad W. Dahlan Muhammad Iqbal Fahmi Muhimmatul Mustaghfiroh, Afifah Mustaghfiroh, Afifah Muhimmatul Nanang Tri Widodo Nareswari, Aninda Nashiroh, Ni'matun Nongnoot Wongkaew Nuzulul Kurniawan Isvani Oki Mandalia Antasari Okky Anggraito Patsamon Rijiravanich Pazar Ramadani, Dhody Ponco Prananto, Yuniar Prasetya, Desta Enggar Dwi Prayoga, Indrajid Qonitah Fardiyah Qonitah Fardiyah Rachmat Triandi Tjahjanto Radna Nurmasari Rahmani, Indri Alidha Ramadani, Dhody Pazar Rika Endara Safitri Risti, Sandria Gita Rizki Sugiri Roosdiana, Anna Rossy Dwi Adhi Pratiwi Rumhayati, Barlah Sabarudin, Akhmad Safitri, Alfita Sasangka Prasetyawan Sasangka Prasetyawan Sendy Kurniawan Septi Fajar Raeni Setyorini, Dian Ayu Soebiantoro soebiantoro Suryantoro, Angga Sutrisno, Sutrisno Ulfa Andayani Ulfa Andayani Ulfa Andayani, Ulfa Unsania Haresmawati Yuniar Ponco Prananto ZAINUL ABIDIN Zainuri, Akhmad

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