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Person

Alexandra B Etheridge

Associate Director for Hydrologic Studies
Oregon Water Science Center

Email: aetherid@usgs.gov
Office Phone: 503-593-1837

Location
Moda Tower
601 SW 2nd Ave
Ste 1950
Portland , OR 97204
US

Supervisor: Joanna N Thamke
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Optical sensors measuring fluorescence of dissolved organic matter (fDOM) are increasingly used in water quality studies because they provide proxy measurements for a variety of contaminants and constituents of concern including metals and wastewater effluent. Similarly, sensors measuring fluorescence of chlorophyll (fChl) and phycocyanin (fPC) have gained popularity to measure phytoplankton concentration, biomass, and even primary productivity. Optical sensors require calibration using a calibration standard solution which is diluted from a working stock solution. However, preparation of stock solutions is challenging because they are difficult to prepare accurately, need to be prepared in a laboratory setting,...
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