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In situ monitoring of environmental water quality using an autonomous microfluidic sensor

Cleary, John and Maher, Damien and Slater, Conor and Diamond, Dermot (2010) In situ monitoring of environmental water quality using an autonomous microfluidic sensor. In: SAS 2010 - IEEE Sensors Applications Symposium, 23-25 February 2010 , Limerick, Ireland. ISBN 978-1-4244-4988-0

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Abstract

An autonomous microfluidic sensor for phosphate in environmental waters has been developed and assessed in laboratory and field trials. The sensor is based on the molybdenum yellow method for phosphate detection in which a phosphate-containing sample is mixed with a reagent containing ammonium molybdate and ammonium metavanadate in an acidic medium. The yellow-colored compound which is formed absorbs strongly below 400nm and its absorbance is proportional to the concentration of phosphate in the original sample. The sensor utilizes a microfluidic manifold where mixing, reaction and detection take place. Optical detection is performed using a LED (light emitting diode) light source and a photodiode detector. The sensor also combines pumping system, power supply, reagent and waste storage, and wireless communications into a compact and portable device. Here we report the successful use of the sensor to monitor phosphate levels in an estuarine environment.

Item Type:Conference or Workshop Item (Paper)
Event Type:Conference
Refereed:Yes
Uncontrolled Keywords:environmental monitoring;
Subjects:Physical Sciences > Analytical chemistry
Physical Sciences > Chemical detectors
Physical Sciences > Environmental chemistry
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 IEEE Sensors Applications Symposium. . Institute of Electrical and Electronics Engineers. ISBN 978-1-4244-4988-0
Publisher:Institute of Electrical and Electronics Engineers
Official URL:http://dx.doi.org/10.1109/SAS.2010.5439385
Copyright Information:©2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Funders:EI IP/2008/544 CFTD/08/111, Enterprise Ireland, SFI 07/CE/I1147, Science Foundation Ireland
ID Code:15249
Deposited On:06 Apr 2010 12:15 by John Cleary. Last Modified 06 Apr 2010 12:15

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