Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent

The use of red, green, and blue (RGB) light-emitting-diode (LED) is a new trend in monochromatic colorimetric sensing due to cost-effective implementation. However, the application of RGB LED in pH measurement depends on the performance of the LED colour towards the colorimetric solution of interest...

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Published in:Indonesian Journal of Electrical Engineering and Computer Science
Main Author: Maidan Dali M.R.; Azam A.S.; Abd Rahman M.F.; Ahmad K.A.; Othman N.A.; Abdullah M.H.; Omar A.F.
Format: Article
Language:English
Published: Institute of Advanced Engineering and Science 2022
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85136109106&doi=10.11591%2fijeecs.v27.i3.pp1330-1337&partnerID=40&md5=9d44b0c3545a11c5bc1ad00ffd2c99cf
id 2-s2.0-85136109106
spelling 2-s2.0-85136109106
Maidan Dali M.R.; Azam A.S.; Abd Rahman M.F.; Ahmad K.A.; Othman N.A.; Abdullah M.H.; Omar A.F.
Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
2022
Indonesian Journal of Electrical Engineering and Computer Science
27
3
10.11591/ijeecs.v27.i3.pp1330-1337
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85136109106&doi=10.11591%2fijeecs.v27.i3.pp1330-1337&partnerID=40&md5=9d44b0c3545a11c5bc1ad00ffd2c99cf
The use of red, green, and blue (RGB) light-emitting-diode (LED) is a new trend in monochromatic colorimetric sensing due to cost-effective implementation. However, the application of RGB LED in pH measurement depends on the performance of the LED colour towards the colorimetric solution of interest, hence, needs to be evaluated. This work evaluated the performance of RGB LED for pH measurement system based on colorimetric approach using phenol red as a reagent. The main objective was to identify the LED colour with the best performance in terms of signal response and absorbance behavior. In this work, LED and photodiode were used as optical components and NI USB DAQ with LabView as the processing software. Four samples with known pH values were prepared and tested to obtain the voltage and absorbance behavior of each LED colour. Among all, the blue LED with wavelength ranged between 450-495 nm showed the best sensing behavior based on its linearity and error. Both voltage response and absorbance produced linear correlation with R 2=0.883 and R 2=0.9803, respectively. The significant finding from this study is useful in selecting the best RGB LED that is suitable for colorimetric pH measurement with phenol red as its colorimetric reagent. © 2022 Institute of Advanced Engineering and Science. All rights reserved.
Institute of Advanced Engineering and Science
25024752
English
Article
All Open Access; Gold Open Access
author Maidan Dali M.R.; Azam A.S.; Abd Rahman M.F.; Ahmad K.A.; Othman N.A.; Abdullah M.H.; Omar A.F.
spellingShingle Maidan Dali M.R.; Azam A.S.; Abd Rahman M.F.; Ahmad K.A.; Othman N.A.; Abdullah M.H.; Omar A.F.
Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
author_facet Maidan Dali M.R.; Azam A.S.; Abd Rahman M.F.; Ahmad K.A.; Othman N.A.; Abdullah M.H.; Omar A.F.
author_sort Maidan Dali M.R.; Azam A.S.; Abd Rahman M.F.; Ahmad K.A.; Othman N.A.; Abdullah M.H.; Omar A.F.
title Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
title_short Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
title_full Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
title_fullStr Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
title_full_unstemmed Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
title_sort Optical absorbance of RGB LEDs in pH measurement of colorimetric solution with phenol red reagent
publishDate 2022
container_title Indonesian Journal of Electrical Engineering and Computer Science
container_volume 27
container_issue 3
doi_str_mv 10.11591/ijeecs.v27.i3.pp1330-1337
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85136109106&doi=10.11591%2fijeecs.v27.i3.pp1330-1337&partnerID=40&md5=9d44b0c3545a11c5bc1ad00ffd2c99cf
description The use of red, green, and blue (RGB) light-emitting-diode (LED) is a new trend in monochromatic colorimetric sensing due to cost-effective implementation. However, the application of RGB LED in pH measurement depends on the performance of the LED colour towards the colorimetric solution of interest, hence, needs to be evaluated. This work evaluated the performance of RGB LED for pH measurement system based on colorimetric approach using phenol red as a reagent. The main objective was to identify the LED colour with the best performance in terms of signal response and absorbance behavior. In this work, LED and photodiode were used as optical components and NI USB DAQ with LabView as the processing software. Four samples with known pH values were prepared and tested to obtain the voltage and absorbance behavior of each LED colour. Among all, the blue LED with wavelength ranged between 450-495 nm showed the best sensing behavior based on its linearity and error. Both voltage response and absorbance produced linear correlation with R 2=0.883 and R 2=0.9803, respectively. The significant finding from this study is useful in selecting the best RGB LED that is suitable for colorimetric pH measurement with phenol red as its colorimetric reagent. © 2022 Institute of Advanced Engineering and Science. All rights reserved.
publisher Institute of Advanced Engineering and Science
issn 25024752
language English
format Article
accesstype All Open Access; Gold Open Access
record_format scopus
collection Scopus
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