Lab-on-Chip for In Situ Analysis of Nutrients in the Deep Sea.
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Beaton, Alexander D.
Schaap, Allison M.
Cardwell, Christopher L.
Hartman, Susan E.
Mowlem, Matthew C.
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Microfluidic reagent-based nutrient sensors offer a promising technology to address the global undersampling of ocean chemistry but have so far not been shown to operate in the deep sea (>200 m). We report a new family of miniaturized lab-on-chip (LOC) colorimetric analyzers making in situ nitrate and phosphate measurements from the surface ocean to the deep sea (>4800 m). This new technology gives users a new low-cost, high performance tool for measuring chemistry in hyperbaric environments. Using a combination of laboratory verification and field based tests, we demonstrate that the analyzers are capable of in situ measurements during profiling that are comparable to laboratory based analyses. The sensors feature a novel and efficient inertial flow mixer that increases the mixing efficiency and reduces the back pressure and flushing time compared to a previously used serpentine mixing channel. Four separate replicate units of the nitrate and phosphate sensor were calibr.....
Page Rangepp. 89−98
Sustainable Development Goals (SDG)14.a
Essential Ocean Variables (EOV)Nutrients
Maturity LevelPilot and Demonstrated
CitationBeaton, Alexander D., Schaap, Allison M., Pascal, Robin, et al (2022) Lab-on-Chip for In Situ Analysis of Nutrients in the Deep Sea. ACS Sensors, 7, pp.89-98. DOI: https://doi.org/10.1021/acssensors.1c01685
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