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Article

Performance of a Handheld Chlorophyll-a Fluorometer: Potential Use for Rapid Algae Monitoring

1
School of Natural Resources and the Environment, University of Arizona, Tucson, AZ 85721, USA
2
Department of Aquatic Resources Management, University of Mulawarman, Samarinda 75123, Indonesia
3
Department of Environmental Science, University of Arizona, Tucson, AZ 85721, USA
*
Author to whom correspondence should be addressed.
Academic Editors: David Werner, Kishor Acharya and Zhugen Yang
Water 2021, 13(10), 1409; https://doi.org/10.3390/w13101409
Received: 25 March 2021 / Revised: 13 May 2021 / Accepted: 14 May 2021 / Published: 18 May 2021
(This article belongs to the Special Issue Field Methods for Water Quality Surveying)
Chlorophyll-a measurements are an important factor in the water quality monitoring of surface waters, especially for determining the trophic status and ecosystem management. However, a collection of field samples for extractive analysis in a laboratory may not fully represent the field conditions. Handheld fluorometers that can measure chlorophyll-a in situ are available, but their performance in waters with a variety of potential light-interfering substances has not yet been tested. We tested a handheld fluorometer for sensitivity to ambient light and turbidity and compared these findings with EPA Method 445.0 using water samples obtained from two urban lakes in Tucson, Arizona, USA. Our results suggested that the probe was not sensitive to ambient light and performed well at low chlorophyll-a concentrations (<25 µg/L) across a range of turbidity levels (50–70 NTU). However, the performance was lower when the chlorophyll-a concentrations were >25 µg/L and turbidity levels were <50 NTU. To account for this discrepancy, we developed a calibration equation to use for this handheld fluorometer when field monitoring for potential harmful algal blooms in water bodies. View Full-Text
Keywords: water quality; turbidity; ecosystem management; biomonitoring; freshwater water quality; turbidity; ecosystem management; biomonitoring; freshwater
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MDPI and ACS Style

Hamdhani, H.; Eppehimer, D.E.; Walker, D.; Bogan, M.T. Performance of a Handheld Chlorophyll-a Fluorometer: Potential Use for Rapid Algae Monitoring. Water 2021, 13, 1409. https://doi.org/10.3390/w13101409

AMA Style

Hamdhani H, Eppehimer DE, Walker D, Bogan MT. Performance of a Handheld Chlorophyll-a Fluorometer: Potential Use for Rapid Algae Monitoring. Water. 2021; 13(10):1409. https://doi.org/10.3390/w13101409

Chicago/Turabian Style

Hamdhani, Hamdhani, Drew E. Eppehimer, David Walker, and Michael T. Bogan 2021. "Performance of a Handheld Chlorophyll-a Fluorometer: Potential Use for Rapid Algae Monitoring" Water 13, no. 10: 1409. https://doi.org/10.3390/w13101409

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