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...
Published in: | Indonesian Journal of Electrical Engineering and Computer Science |
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Institute of Advanced Engineering and Science
2022
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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 |
_version_ |
1809678024194392064 |