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Microfluidic analyser for pH in water and wastewater

Cleary, John and Cogan, Deirdre and Phelan, Thomas and Diamond, Dermot (2013) Microfluidic analyser for pH in water and wastewater. In: CEST2013 The 13th International Conference on Environmental Science and Technology, 5-7 Sept 2013, Athens, Greece. ISBN 978-960-7475-51-0

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Abstract

The Microfluidic Analyser for pH and Chemical Oxygen Demand (MApCOD) project is the latest stage in the development of a microfluidic platform for autonomous monitoring of environmental water quality. pH measures the acidity or basicity of water. Most aquatic animals are adapted to a range of 6.5–8.0 (close to neutral, pH 7.0). Low pH can also allow toxic substances such as ammonia to become more available for uptake by aquatic plants and animals, greatly increasing their effective toxicity. pH is commonly measured in industrial and municipal wastewaters as well as in monitoring of drinking water, of surface waters such as rivers and lakes, and in many industrial processes. In this project pH is measured using a combination of pH indicators, optimised to give a colorimetric response over the pH range 4.0–10.0, which covers the range of pH values commonly encountered in monitoring of surface waters, drinking water and many wastewaters. Dual LEDs and a photodiode are used to measure light absorbance at appropriate wavelengths (430 and 570 nm). The responses of the two pH indicators are complementary, allowing a colorimetric response to be obtained over the pH range of interest.

Item Type:Conference or Workshop Item (Paper)
Event Type:Conference
Refereed:Yes
Uncontrolled Keywords:Microfluidics
Subjects:Physical Sciences > Analytical chemistry
Physical Sciences > Chemical detectors
Physical Sciences > Chemistry
DCU Faculties and Centres:Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Published in:Proceedings of the 13th International Conference on Environmental Science and Technology. Proceedings of the International Conference on Environmental Science and Technology . Global Network for Environmental Science and Technology (Global-NEST). ISBN 978-960-7475-51-0
Publisher:Global Network for Environmental Science and Technology (Global-NEST)
Copyright Information:© 2013 Global-NEST
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Enterprise Ireland, Science Foundation Ireland
ID Code:19410
Deposited On:25 Sep 2013 16:31 by John Cleary. Last Modified 17 Feb 2017 10:58

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