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New generation of micro sensors for monitoring ocean acidification
Date:11/13/2013

p>"The microfluidic chip within the sensor has great advantages because it is robust, small, reasonably cheap to produce, and uses small amounts of reagents which is really key for in situ deployment where it may be collecting data out at sea for long periods of time.

"The sensor uses a dye which changes colour with pH. The dye is added to the sample, then the colour is measured using an LED light source and a device called a 'spectrometer'. The microfluidic element simply describes the component needed to mix the seawater sample with the dye and the cell to measure the colour."

The next stage is to develop an in situ system that can be deployed on ocean observing platforms, as has been done with other sensors measuring different chemical properties of seawater. "Now that we know that the bench top system works, we can use the technology from other systems to create in situ pH micro sensors," says Dr Rrolle. "This is what we are working on now, in collaboration with oceanographers based at NOC.

"By working with both engineers and scientists, you benefit from the insights of the developers and the end-user, resulting in a fit-for-purpose end product built to high specification."


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Contact: Catherine Beswick
catherine.beswick@noc.ac.uk
National Oceanography Centre, Southampton (UK)
Source:Eurekalert  

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