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Development of cost effective sensors for the in-situ monitoring of eutrophication

McCaul, Margaret and McNamara, Eoghan and Diamond, Dermot (2015) Development of cost effective sensors for the in-situ monitoring of eutrophication. In: Pittcon 2015, 8-12 Mar 2015, New Orleans, LA..

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Abstract

This work is carried out as part of the COMMON SENSE European FP7 project. The COMMON SENSE project aims to provide a reliable sensing platform for in-situ measurements on key marine water quality parameters relating to eutrophication, heavy metal contaminants, marine litter and underwater noise. The COMMON SENSE nutrient sensor is based on a combination of microfluidic analytical systems, colorimetric reagent chemistry, low-cost LED-based optical detection, and wireless communications. The reliable quantification of nutrients in marine environments is challenging due to the low concentration of these solutes in the ocean and the nature of the matrix in which they are held. Initial studies are focussed on validating a method for the sequential determination of nitrite and nitrate in marine environments. Coupled with the traditional well established Griess–Ilosvay reaction for the determination of nitrite, a vanadium chloride (VCl3) solution is used as the reducing agent. The method shows potential as an alternative to the toxic cadmium column for the reduction of NO3- to NO2- in marine water as results indicate that there are no apparent interferences from variances in salinity. The method was tested on a series of samples with varying salinities and sample matrices (costal, estuarine and freshwater), the method is low cost, reproducible and requires low volumes of sample and reagents.

Item Type:Conference or Workshop Item (Invited Talk)
Event Type:Conference
Refereed:Yes
Subjects:Engineering > Mechanical engineering
Physical Sciences > Environmental chemistry
Engineering > Environmental engineering
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > INSIGHT Centre for Data Analytics
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:European Union’s Seventh Framework Programme for research, technological development and demonstration under Grant Agreement No 614155, SFI Grant 12/RC/2289
ID Code:20630
Deposited On:09 Jun 2015 14:36 by Margaret McCaul. Last Modified 09 Jun 2015 14:36

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