Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled...
-
Upload
bernadette-francis -
Category
Documents
-
view
222 -
download
0
Transcript of Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled...
![Page 1: Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled both spatially and temporally Global network of sensors.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649cda5503460f949a398a/html5/thumbnails/1.jpg)
Development of microfluidic sensors for autonomous seawater measurements
The oceans are undersampled both spatially and temporallyGlobal network of sensors that can measure seawater properties continuously
![Page 2: Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled both spatially and temporally Global network of sensors.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649cda5503460f949a398a/html5/thumbnails/2.jpg)
The Gardner hype cycle model for microfluidics.From H Becker Lab Chip, 2009DOI: 10.1039/b911553f Focus
Why Lab-on Chip /Microfluidics?
• Mass manufacturing capabilities leading to cost reduction
• Reagent based systems: low fluid volume and reagent consumption. Low power requirements
• Ability to design compact systems with complex microfluidic geometries
![Page 3: Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled both spatially and temporally Global network of sensors.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649cda5503460f949a398a/html5/thumbnails/3.jpg)
Provides us with the ability to measure a range of nutrients such as:
Nitrate / NitritePhosphateIron ManganeseAmmonium
And also the carbonate chemistry of the oceans:
pH.TADIC
Lab-on Chip and microfluidics using colorimetric methods
![Page 4: Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled both spatially and temporally Global network of sensors.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649cda5503460f949a398a/html5/thumbnails/4.jpg)
A field-deployable sensor for automated in-situ spectrophotometric pH measurements
• Measurement based on the formation of a concentration gradient measured by a two wavelength LED
• Total concentration of indicator and pH is calculated and plotted to derive a perturbation free pH sample
Top: Fluidic & LED access holes
Middle: Fluidic channels
Bottom: Fixing bracket
Serpentine mixing channel Detector
Reagent Sample
Temp sensor
Figure 1 Three layered microfluidic chip Figure 2 Detail of microfluidic middle layer section
![Page 5: Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled both spatially and temporally Global network of sensors.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649cda5503460f949a398a/html5/thumbnails/5.jpg)
Macronutrient cycles
Christchurch harbour, UK
![Page 6: Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled both spatially and temporally Global network of sensors.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649cda5503460f949a398a/html5/thumbnails/6.jpg)
Nitrate Sensor On Kongsberg Glider
![Page 7: Development of microfluidic sensors for autonomous seawater measurements The oceans are undersampled both spatially and temporally Global network of sensors.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649cda5503460f949a398a/html5/thumbnails/7.jpg)
• pH system currently being tested at the Wendy Schmidt XPrize Phase 3 in Seattle for one month coastal trials
• Preparations for further nitrate glider deployments• Deployments in the Arctic and Greenland
Current and future work
D.R. Owsianka
Acknowledgements
OTEG Team at NOCand University of Southampton