A Lab-On-Chip Phosphate Analyzer for Long-term In Situ Monitoring at Fixed Observatories: Optimization and Performance Evaluation in Estuarine and Oligotrophic Coastal Waters,
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Date
2017Author
Grand, Maxime M.
Clinton-Bailey, Geraldine S.
Beaton, Alexander D.
Schaap, Allison M.
Johengen, Thomas H.
Tamburri, Mario N.
Connelly, Douglas P.
Mowlem, Matthew C.
Achterberg, Eric P.
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Show full item recordAbstract
The development of phosphate sensors suitable for long-term in situ deployments
in natural waters, is essential to improve our understanding of the distribution,
fluxes, and biogeochemical role of this key nutrient in a changing ocean. Here,
we describe the optimization of the molybdenum blue method for in situ work
using a lab-on-chip (LOC) analyzer and evaluate its performance in the laboratory
and at two contrasting field sites. The in situ performance of the LOC sensor is
evaluated using hourly time-series data from a 56-day trial in Southampton Water
(UK), as well as a month-long deployment in the subtropical oligotrophic waters of
Kaneohe Bay (Hawaii, USA). In Kaneohe Bay, where phosphate concentrations were
characteristic of the dry season (0.13 ± 0.03 μM, n = 704), the in situ sensor
accuracy was 16 ± 12% and a potential diurnal cycle in phosphate concentrations was
observed. In Southampton Water, the sensor data (1.02 ± 0.40 μM, n = 1,267) were
accurate to ±0.10 μM.....
Journal
Frontiers in Marine ScienceVolume
4Issue
Article 255Page Range
16pp.Document Language
enSustainable Development Goals (SDG)
14.AEssential Ocean Variables (EOV)
NutrientsMaturity Level
TRL 8 Actual system completed and "mission qualified" through test and demonstration in an operational environment (ground or space)Best Practice Type
Manual (incl. handbook, guide, cookbook etc)Standard Operating Procedure
Spatial Coverage
Southampton WaterKaneohe Bay
DOI Original
10.3389/fmars.2017.00255Citation
Grand, M.M.; Clinton-Bailey, G,S,; Beaton, AD, Schaap, AM., Johengen, T.H.; Tamburri, M.N.; Connelly, D.P.; Mowlem, M.C. and Achterberg, E.P. (2017) A Lab-On-Chip Phosphate Analyzer for Long-term In Situ Monitoring at Fixed Observatories: Optimization and Performance Evaluation in Estuarine and Oligotrophic Coastal Waters. Frontiers in Marine Science, 4:255, 16pp. DOI: 10.3389/fmars.2017.00255Collections
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