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All Journal International Journal of Electrical and Computer Engineering
Abd Rahman, Mohamad Faizal
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Computer Science & IT Electrical & Electronics Engineering

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Low-cost colorimetric setup for concentration measurement of manganese ions based on optical absorbance Maidan Dali, Mohd Rumaizan; Ali, Nurul Hidayah; Mohamad Robi, Fatin Izyani; Osman, Mohamed Syazwan; Abd Rahman, Mohamad Faizal
International Journal of Electrical and Computer Engineering (IJECE) Vol 13, No 6: December 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v13i6.pp6195-6203

Abstract

This study presents a cost-effective setup for measuring the concentration of Mn2+ ions using colorimetry. The current method involves a calibration curve created with expensive and large commercial laboratory-based instruments, limiting its use in financially constrained situations. To address this issue, the study proposes a low-cost setup consisting of a light-emitting diode and photodiode that utilizes colorimetric and absorbance effects for Mn2+ concentration measurement. Mn2+ colorimetric samples were prepared using the 1-(2-pyridylazo)-2-naphthol (PAN) method with concentrations ranging from 0.2 to 1.0 mg/L. The samples were tested using the proposed setup, followed by a spectrophotometry test to determine the optimal configuration for the setup. The validity of the setup was confirmed by measuring the voltage and calculating the optical absorbance, which exhibited a good correlation with the concentration, consistent with the initial expectation. The correlation coefficient for voltage and absorbance against Mn2+ concentration was found to be 0.9976 and 0.9987, respectively, indicating good linearity and suitability as a calibration curve for Mn2+ detection and measurement. Consequently, the study’s objectives were successfully achieved, and the proposed setup is considered a viable platform for more complex applications, such as real-time monitoring activities.
Co-Authors Ali, Nurul Hidayah Maidan Dali, Mohd Rumaizan Mohamad Robi, Fatin Izyani Osman, Mohamed Syazwan