Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

0.444

P-Index

This Author published in this journals

All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Natural B The Journal of Pure and Applied Chemistry Research Indonesian Journal of Electrical Engineering and Computer Science

Akhmad Sabarudin

Brawijaya University

Author-ID : 2452327

Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology

Published : 7 Documents Claim Missing Document

Claim Missing Document

Articles

Optical sensor based on dye-sensitized solar cell with tobacco chlorophyll Eka Maulana; Rahmadwati Rahmadwati; Sapriesty Nainy Sari; Akhmad Sabarudin
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 4: August 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i4.12613

Modified optical sensor based on dye-sensittized solar cell has been successfully fabricated to measure the number of light energy. The electric parameters as the sensor output were achieved from the light illuminance as the sensor input. The measured parameter from optical sensor according to the voltage and current output have been characterized to obtain the sensor performance. In this research, the modified sensor is customized from dye-sensitized solar cell with extracted tobacco chlorophyll dye as the photo-catalysator, photo-electrode of titanium dioxide and Iodine solution for redox reaction. The thick layer deposition with selected material is conducted using spin coating method of 1000 rpm. Based on the absorbance measurement, it shows that tobacco dye has the characteristics of visible light absorption in the wavelength of visible light spectra. The analytical result shows that the sensor has the wide linear characteristic in certain light illuminance and the increasing light intensity produces higher electrical parameter output both current and voltage. This sensor has potential prospect to be used as a light sensor and to be competitive fabrication cost.

Optimization of Pesticide Analysis Method for Diazinon and Chlorantraniliprol Using High Performance Liquid Chromatography (HPLC) Marselina Theresia Djue Tea; Akhmad Sabarudin; Hermin Sulistyarti
Natural B, Journal of Health and Environmental Sciences Vol 4, No 2 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

Methods of obtaining diazinone and chlorantraniliprol in soil samples have been developed. Analytes were extracted using acetonitrile by using an ultrasonic solvent extraction method (USE). The discovery uses high performance liquid chromatography using a UV detector. The optimum conditions for the separation of both pesticides are Acetonitrile composition: Air (60:40), flow rate 0.4 mL / min, and at 220 nm wavelength. The more the amount of acetonitrile in the eluent mixture the faster the retention time in the column. Retention time respectively, chlorantraniliprol 10,525, and diazinon 21,029.

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.

Flow Injection–Indirect Spectrophotometry for Hydroquinone Analysis Based on the Formation of Iron(II)-Phenanthroline Complex Mariam Mohamed Omar Alshibani; Hermin Sulistyarti; Akhmad Sabarudin
The Journal of Pure and Applied Chemistry Research Vol 8, No 3 (2019): Edition September-December 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.03.478

Hydroquinone is an organic antioxidant widely used for skin lightening products which can cause negative impact in excessive use. This study is focused on the development of fast method for the determination of hydroquinone using flow injection-indirect spectrophotometry based on the formation of red complex Iron(II)-phenanthroline. In this method, hydroquinone reduced iron(III) to iron(II) which in the presence of phenanthroline formed Iron(II)-phenanthroline complex detected at maximum wavelength of 510 nm. The common operational and chemical conditions were optimized and the effect of several interfering compounds was also studied to achieve the highest sensitivity with acceptable analysis time. The optimum method performance was obtained under the conditions of 100 µL sample volume, 50 cm mixing coil-1and 75 cm mixing coil-2, 5 ml/min flow rate, 100 mgL-1 Iron(III) concentration, and 0.15 % phenanthroline. Under these conditions the proposed FI-spectrophotometry gave results to linear calibration over the concentration range from 2-100 mgL-1 (y = 0.028x and R2 of 0.999). The method was not interfered in the presence of vitamin C 1 mgL-1 and resorcinol up to 10 mgL-1. However, the higher concentration of vitamin C ³10 ppm and resorcinol ³ 20 ppm gave significant error of measurements. Method validation using standard additions gave results to average recovery value of 97.02 %, which indicates that the FI-spectrophotometry method can be used as an alternative method for determining hydroquinone in cosmetic. Key words: Hydroquinone, flow injection, spectrophotometry, iron, phenanthroline.

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.

Biosynthesis of Cu2O/CuO-NP and AgNP Using Rhizopus oligosporus as Reductor Agent Dwi Putri Woro Pamungkas; Suci Amaliyah; Akhmad Sabarudin; Anna Safitri
The Journal of Pure and Applied Chemistry Research Vol 10, No 3 (2021): Edition September-December 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.03.594

Nanoparticles have been widely used in various fields which depends on its size and shape. Nanoparticles can be synthesized physically and chemically. However, these methods need large amount of energy, not environmental friendly and quite expensive, because requires several additional materials besides precursors. In this study, we performed the analysis of some parameters to determine the best conditions for biosynthesis using Rhizopus oligosporus to obtain the nanoparticles with specific size. This fungi was used because easy to find, cultivate, and handle. We found that grain size of Cu2O/CuO-NP and AgNP obtained are 23 nm, 55 nm respectively. In conclusion, this study confirms that some parameters investigated and Rhizopus oligosporus can be used to obtain the nanoparticles with specific size.

Optical Sensor Based on Dye Sensitized Solar Cell (DSSC) Rahmadwati Rahmadwati; Sapriesty Nainy Sari; Eka Maulana; Akhmad Sabarudin
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 2: November 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i2.pp685-690

An optical sensor is designed to convert a number of light energy in to electrical energy. The sensor hasbeen successfully measured using light illuminance to achieve electric parameters as the sensor output. In this research the optical sensor design was characterized according to the voltage and current output with the stimulus from mercury lamp. The sensor is customized from Dye-Sensitized Solar Cell with photo-electrode and photo-catalysator of Titanium Dioxide and extracted tobacco chlorophyll dye. Spin coating method was conducted to fabricate the thick layer deposition using selected material. Based on the absorbance measurement, it shows that tobacco dye has the characteristics of visible light absorption in the wavelength of 300-000 nm. The result of this research revealed that from 2 variation of optical sensor design square with active area of (2 cm x 2 cm) and (1 cm x 1 cm). Analitycal result shows that the sensor has wide linear characteristic in certain light illuminance both of output current and voltage.

Co-Authors Ahmad Luthfi Fahmi Ani Mulyasuryani Dwi Putri Woro Pamungkas Eka Maulana Erasti Pratiwi Hanandayu Widwiastuti Hermin Sulistyarti Ika Oktavia Wulandari Kamila Rohadatul ‘Aisy Mariam Mohamed Omar Alshibani Rahmadwati, n/a Safitri, Anna Sari, Sapriesty Nainy Suci Amaliyah Tea, Marselina Theresia Djue

Title

Found 7 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 7 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 7 Documents
Search