On-site colorimetric determination of pH in brackish water aquaculture
Abstract
Purpose
This study aims to describe on-site determination of pH in aquaculture using a portable colorimeter.
Design/methodology/approach
A basic and inexpensive portable colorimeter having light sources of different wavelength has been optimized for the determination of pH. A chromic reagent is optimized to develop colors depending on different pHs. Then, the color is measured using portable colorimeter in terms of resistance. Using the resistance to absorbance relationship, the resistance values are converted to absorbance. The performance of the developed colorimetric system is compared with commercially available colorimeter and pH meter. Eighty brackish water aquaculture samples were tested using the developed colorimetric system to check its adaptability in aquaculture farms.
Findings
A chromic reagent optimized in this study exhibited linear relationship with the pH changes of pH standards. Portable colorimeter having three different light sources is optimized using this chromic agent for determination of pH. Colorimeter possessing yellow light revealed more linear results than the others. The developed colorimetric system determines the pH of aquaculture water with an accuracy of ±0.14 in comparison with commercial colorimeter at the pH range of 6.0−9.0.
Originality/value
pH plays a pivotal role in aquaculture, impacting not only productivity but also profitability. The colorimetric system introduced in this research is promising for pH measurement in the field of brackish water aquaculture. The on-site pH assessment facilitated by this colorimetric system holds significant potential for adoption within the aquaculture sector, owing to its precision, portability, simplicity of use and user-friendly nature.
Keywords
Acknowledgements
The authors are thankful to the funding agencies and the Tamil Nadu Dr J. Jayalalithaa Fisheries University, Nagapattinam for support towards this research. Part of this work was financially supported by Unnat Bharat Abhiyan (UBA), Ministry of Education, India (Technology Development Project no.RP-03525G). TNSCSTSPS 2021-22 (Project.no.ES-157), has financially supported a part of this work.
Citation
Devarayan, K., Anandakumar Muthurani, D., Kannusamy, G., Theivasigamani, A., Palanisamy, Y., Mohan, G., Sukumaran, M., Siluvai John, E.U., Marimuthu, R. and Anjappan, H. (2024), "On-site colorimetric determination of pH in brackish water aquaculture", Pigment & Resin Technology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/PRT-11-2023-0099
Publisher
:Emerald Publishing Limited
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