Investigation of a fiber optic surface plasmon spectroscopy in conjunction with conductivity as an in situ method for simultaneously monitoring changes in dissolved organic carbon and salinity in coastal waters

A combination surface plasmon resonance (SPR) and conductivity sensor array was developed and implemented to demonstrate the ability to differentiate among changes in dissolved organic carbon (DOC) and salinity in coastal water. The array is capable of achieving sufficient spatial and temporal data...

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Bibliographic Details
Published in:Analyst (London) 2011-10, Vol.136 (20), p.4350-4356
Main Authors: KIM, Yoon-Chang, CRAMER, Jeffrey A, BOOKSH, Karl S
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Carbon
Carbon - chemistry
Chemistry
Coastal water
Dissolution
Electric Conductivity
Environmental Monitoring - methods
Exact sciences and technology
Fiber Optic Technology
General, instrumentation
Global environmental pollution
Microorganisms
Monitoring
Pollution
Salinity
Seawater - chemistry
Sensors
Spectroscopy
Surface Plasmon Resonance
Temperature
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Summary:A combination surface plasmon resonance (SPR) and conductivity sensor array was developed and implemented to demonstrate the ability to differentiate among changes in dissolved organic carbon (DOC) and salinity in coastal water. The array is capable of achieving sufficient spatial and temporal data density to better understand the cycling and fate of terrestrial DOC in coastal areas. DOC is the second largest source of bioreactive carbon in the environment and plays a key role in mediating microbial activity and generation of atmospheric CO(2). In the coastal areas, the salinity is also an important property in many applications, such as leak detection for landfill liners, saltwater intrusion to drinking water, marine environment monitoring, and seasonal climate prediction. Conductivity sensors are the industry standard for determining salinity in ocean systems. However, both conductivity and refractive index sensors, such as SPR spectroscopy based sensors, respond to salinity and DOC levels. To demonstrate the capability of the SPR sensor and a conductivity sensor to collect complimentary data useful in discrimination of salinity and DOC in coastal zone water, conductivity, SPR, and temperature data were collected during passage from the Juan de Fuca ridge area returning to the University of Washington docks.
ISSN:0003-2654
1364-5528
DOI:10.1039/c1an15085e