Instrumentation for continuous monitoring in marine environments

Moscetta, Pompeo; Sanfilippo, Luca; Savino, Enrico; Moscetta, Pietro; Allabashi, Roza; Gunatilaka, Amara

doi:10.23919/oceans.2009.5422370

Cited by 11 publications

(13 citation statements)

References 20 publications

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“…A solar panel (SX2OU, Solavex, Maryland, U.S.A.) was used to charge a 12 V battery, which powered the sensor over the deployment. The sensor has typical analysis power consumption values of 1.8 W (with a maximum current draw of 0.39 A) for a fully blank and standard bracketed sample, compared with, for instance, the WIZ Probe and HydroCycle-P, which have average operating power requirements of 6 and 12 W, respectively (with a maximum current draw of 1 and 3 A, respectively), in analysis mode . Measurements were made hourly for 9 weeks, and the sample inlet filter and the reagent bags were replaced every 4.5 weeks during routine site visits and field equipment checks.…”

Section: Methodsmentioning

confidence: 99%

“…The sensor has typical analysis power consumption values of 1.8 W (with a maximum current draw of 0.39 A) for a fully blank and standard bracketed sample, compared with, for instance, the WIZ Probe and HydroCycle-P, which have average operating power requirements of 6 and 12 W, respectively (with a maximum current draw of 1 and 3 A, respectively), in analysis mode. 21 Measurements were made hourly for 9 weeks, and the sample inlet filter and the reagent bags were replaced every 4.5 weeks during routine site visits and field equipment checks. Using the sampling and flushing routine described previously (Blank− Sample−NaOH−Standard−NaOH) and 500 mL reagent bags, the sensor would normally only require a reagent change every 7 weeks (this could be extended further by using larger reagent bags).…”

Section: −mentioning

confidence: 99%

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A Lab-on-Chip Analyzer for in Situ Measurement of Soluble Reactive Phosphate: Improved Phosphate Blue Assay and Application to Fluvial Monitoring

Clinton-Bailey

Grand

Beaton

et al. 2017

Environ. Sci. Technol.

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Here, we present a new in situ microfluidic phosphate sensor that features an improved "phosphate blue" assay which includes polyvinylpyrrolidone in place of traditional surfactants-improving sensitivity and reducing temperature effects. The sensor features greater power economy and analytical performance relative to commercially available alternatives, with a mean power consumption of 1.8 W, a detection limit of 40 nM, a dynamic range of 0.14-10 μM, and an infield accuracy of 4 ± 4.5%. During field testing, the sensor was continuously deployed for 9 weeks in a chalk stream, revealing complex relations between flow rates and phosphate concentration that suggest changing dominance in phosphate sources. A distinct diel phosphorus signal was observed under low flow conditions, highlighting the ability of the sensor to decouple geochemical and biotic effects on phosphate dynamics in fluvial environments. This paper highlights the importance of high resolution in situ sensors in addressing the current gross under-sampling of aquatic environments.

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Section: Methodsmentioning

confidence: 99%

Section: −mentioning

confidence: 99%

A Lab-on-Chip Analyzer for in Situ Measurement of Soluble Reactive Phosphate: Improved Phosphate Blue Assay and Application to Fluvial Monitoring

Clinton-Bailey

Grand

Beaton

et al. 2017

Environ. Sci. Technol.

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“…The efficient and timely monitoring of these risk situations, covering a large area, is essential to safeguard public health and the economy, particularly in terms of shellfish and finfish aquaculture [ 40 ]. In line with EU policies [ 41 ], human health can be safeguarded by monitoring programs that include the detection of toxic phytoplankton as well as the presence of toxins in shellfish. In Portugal, monitoring is implemented by the Portuguese Institute for the Ocean and Atmosphere, whereas in Spain, this is performed by regional government bodies, including the Technological Institute for the Control of Marine Environment in Galicia and the Monitoring Program of Andalusia, which decide and inform the closure and opening of shellfish harvest.…”

Section: Toxic Phytoplanktonmentioning

confidence: 99%

Methodological Approaches for Monitoring Five Major Food Safety Hazards Affecting Food Production in the Galicia–Northern Portugal Euroregion

Rodríguez-Herrera

Cabado

Bodelón

et al. 2021

Foods

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The agri-food industry has historically determined the socioeconomic characteristics of Galicia and Northern Portugal, and it was recently identified as an area for collaboration in the Euroregion. In particular, there is a need for action to help to ensure the provision of safe and healthy foods by taking advantage of key enabling technologies. The goals of the FOODSENS project are aligned with this major objective, specifically with the development of biosensors able to monitor hazards relevant to the safety of food produced in the Euroregion. The present review addresses the state of the art of analytical methodologies and techniques—whether commercially available or in various stages of development—for monitoring food hazards, such as harmful algal blooms, mycotoxins, Listeria monocytogenes, allergens, and polycyclic aromatic hydrocarbons. We discuss the pros and cons of these methodologies and techniques and address lines of research for point-of-care detection. Accordingly, the development of miniaturized automated monitoring strategies is considered a priority in terms of health and economic interest, with a significant impact in several areas, such as food safety, water quality, pollution control, and public health. Finally, we present potential market opportunities that could result from the availability of rapid and reliable commercial methodologies.

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“…Because of the superior metrology performance of reagent based analytical methods (Waterbury et al, 1996;Patey et al, 2008Patey et al, , 2010Ma et al, 2014a;Nagul et al, 2015;Birchill et al, 2019;Takeshita et al, 2020), numerous sensors and analytical systems have been developed employing these techniques. This includes in situ deployed systems for Nitrate (Jannasch et al, 1994;David et al, 1998;Steimle et al, 2002;Adornato et al, 2007;Vuillemin et al, 2009;Yaqoob et al, 2012;Bodini et al, 2015), Phosphate (Adornato et al, 2007;Barnard et al, 2009;Moscetta et al, 2009;Ma et al, 2014b;Bodini et al, 2015;Yang et al, 2020), Iron (Chapin et al, 2002;Johnson et al, 2007;Huang et al, 2012;Meyer et al, 2012), and pH (Waterbury et al, 1996;Bellerby et al, 2002;Martz et al, 2003;Liu et al, 2006;Nakano et al, 2006;Wang et al, 2007Wang et al, , 2015Seidel et al, 2008;Assmann et al, 2011;Spaulding et al, 2011;Lai et al, 2018). Some of these systems are commercially available (Hanson, 2000;Barnard et al, 2009;Spaulding et al, 2011;Bodini et al, 2015;…”

Section: Introductionmentioning

confidence: 99%

Industry Partnership: Lab on Chip Chemical Sensor Technology for Ocean Observing

et al. 2021

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We introduce for the first time a new product line able to make high accuracy measurements of a number of water chemistry parameters in situ: i.e., submerged in the environment including in the deep sea (to 6,000 m). This product is based on the developments of in situ lab on chip technology at the National Oceanography Centre (NOC), and the University of Southampton and is produced under license by Clearwater Sensors Ltd., a start-up and industrial partner in bringing this technology to global availability and further developing its potential. The technology has already been deployed by the NOC, and with their partners worldwide over 200 times including to depths of ∼4,800 m, in turbid estuaries and rivers, and for up to a year in seasonally ice-covered regions of the arctic. The technology is capable of making accurate determinations of chemical and biological parameters that require reagents and which produce an electrical, absorbance, fluorescence, or luminescence signal. As such it is suitable for a wide range of environmental measurements. Whilst further parameters are in development across this partnership, Nitrate, Nitrite, Phosphate, Silicate, Iron, and pH sensors are currently available commercially. Theses sensors use microfluidics and optics combined in an optofluidic chip with electromechanical valves and pumps mounted upon it to mix water samples with reagents and measure the optical response. An overview of the sensors and the underlying components and technologies is given together with examples of deployments and integrations with observing platforms such as gliders, autonomous underwater vehicles and moorings.

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Instrumentation for continuous monitoring in marine environments

Cited by 11 publications

References 20 publications

A Lab-on-Chip Analyzer for in Situ Measurement of Soluble Reactive Phosphate: Improved Phosphate Blue Assay and Application to Fluvial Monitoring

A Lab-on-Chip Analyzer for in Situ Measurement of Soluble Reactive Phosphate: Improved Phosphate Blue Assay and Application to Fluvial Monitoring

Methodological Approaches for Monitoring Five Major Food Safety Hazards Affecting Food Production in the Galicia–Northern Portugal Euroregion

Industry Partnership: Lab on Chip Chemical Sensor Technology for Ocean Observing

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