A field-deployable and handheld fluorometer for environmental water quality monitoring

Shin, Young-Ho; Gutierrez-Wing, Maria Teresa; Choi, Jin‐Woo

doi:10.1186/s40486-018-0078-x

Cited by 17 publications

(10 citation statements)

References 11 publications

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“…The adjustment of water level may dilute the PC concentration which is affected by human activities, such as in the swimming area (S) in this study. These results are higher than the WHO alert level 1 (,30 μg/L) of the PC concentration in lake water (Shin et al 2018).…”

Section: Calculation Of Pc On Eutrophic Lakecontrasting

confidence: 66%

Detection of chlorophyll fluorescence as a rapid alert of eutrophic water

Chen

2021

Water Supply

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An in-situ detection of chlorophyll fluorescence was used in an innovative manner to detect eutrophic water, and the results were compared with the Carlson's Trophic State Index (CTSI) indicators. Eutrophication was due to climate warming and anthropogenic activities. The turbidity and chromaticity showed a strong linear relationship (R2 = 0.85) of the Bi Lake in Taipei city. Both the swimming area and the bridge are popular with the general public and had the worst turbidity (35.80–44.00 NTU) and chromaticity (495.37–552.27 Pt). The CTSI had a stronger linear relationship with the phycocyanin (PC) concentration (R2 = 0.605) than with any other three CTSI factors like chlorophyll-a concentration, total phosphorus (TP) concentration, and transparency. The TP pollution had a potential to cause an increase in PC concentration found in this study (R2 = 0.86). The absorbances of the water samples represented that the environment is PC (cyanobacteria) dominant in winter. The PC concentration in Bi Lake ranged from 75.55 to 80.24 μg/L and was higher with lower water temperature. Measurement of in-situ chlorophyll fluorescence is similar to lab-scale spectrophotometer (R2>0.92). The real-time detection of PC concentration could be the basis of a rapid alert system for biological threats to waters.

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Section: Calculation Of Pc On Eutrophic Lakecontrasting

confidence: 66%

Detection of chlorophyll fluorescence as a rapid alert of eutrophic water

Chen

2021

Water Supply

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“…Fluorometers are significantly more sensitive than UV− visible spectrophotometers for measuring algae blooms, detecting phycocyanin concentrations of less than 1 μg/L. 35 This concentration is significantly lower than our concentrations used for pure allophycocyanin (∼1000 μg/L). However, it should be noted that we are performing this analysis on less than 5 μL of sample.…”

Section: ■ Results and Discussionmentioning

confidence: 72%

Rapid Cyanobacteria Species Identification with High Sensitivity Using Native Mass Spectrometry

et al. 2021

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Cyanobacteria have evolved over billions of years to adapt and survive in diverse climates. Environmentally, this presents a huge challenge because cyanobacteria can now rapidly form algae blooms that are detrimental to aquatic life. In addition, many cyanobacteria produce toxins, making them hazardous to animals and humans that they encounter. Rapid identification of cyanobacteria is essential to monitor and prevent toxic algae blooms. Here, we show for the first time how native mass spectrometry can quickly and precisely identify cyanobacteria from diverse aquatic environments. By monitoring phycobiliproteins, abundant protein complexes within cyanobacteria, simple, easy-tounderstand mass spectral "fingerprints" were created that were unique to each species. Moreover, our method is 10-fold more sensitive than the current MALDI-TOF mass spectrometric methods, meaning that cyanobacteria can be monitored using this technology prior to bloom formation. Together, the data show great promise for the simultaneous detection and identification of coexisting cyanobacteria in situ.

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“…1 Sensors and instrumentation play a key role in water management, and are becoming smaller, smarter and more economical. [2][3][4][5] Optical based sensors are receiving great interest due recent advances in photonics and the ability to work in harsh environments. 2,6 In aquatic environments, uorescence based spectroscopy is a common technique used for detection and quantication of chlorophyll (Chl a), 4,7,8 petroleum compounds, 9 fDOM (uorescent dissolved organic matter), 10,11 tryptophan, 12 algal populations [13][14][15] and faecal indicator bacteria.…”

Section: Introductionmentioning

confidence: 99%