Phase fluorometric dissolved oxygen sensor

McDonagh, Colette; Kolle, Christian; McEvoy, Aisling K.; Dowling, D.L.; Cafolla, Atillio A.; Cullen, SarahJane; MacCraith, Brian D.

doi:10.1016/s0925-4005(00)00721-8

Cited by 179 publications

(113 citation statements)

References 9 publications

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“…9 DO in water can be monitored in real-time by either electrochemical 10 or fluorescent DO sensors. 11,12 However, it is usually difficult to obtain DO changes at a vicinity of micrometers from the surface of aquatic plants because of the physical size of the commercial DO sensors.…”

Section: Introductionmentioning

confidence: 99%

Real-time in-situ Simultaneous Monitoring of Dissolved Oxygen and Materials Movements at a Vicinity of Micrometers from an Aquatic Plant by Combining Deflection of a Probe Beam and Fluorescence Quenching

Inoue

2017

ANAL. SCI.

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Section: Introductionmentioning

confidence: 99%

Real-time in-situ Simultaneous Monitoring of Dissolved Oxygen and Materials Movements at a Vicinity of Micrometers from an Aquatic Plant by Combining Deflection of a Probe Beam and Fluorescence Quenching

Inoue

2017

ANAL. SCI.

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“…In phase fluorometric technique [7][8] , fluorescence lifetime τ or phase shift of fluorescence was a function of C DO . A three dimensional diagram (3DD) of phase shift, C DO and temperature T was proposed to obtain C DO from measured phase shift and temperature.…”

Section: Three Dimensional Diagram (3dd) Methodsmentioning

confidence: 99%

Real-time in-situ simultaneous monitoring of dissolved oxygen and materials movements at vicinities of an aquatic plant by fluorescence quenching/deflection with an improved calculation method

Wu¹,

Huang²,

Desk³

2017

SDRP-JPS

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Recently we developed a novel optical detection system that allowed real-time in-situ simultaneous monitoring of dissolved oxygen and materials movements at a vicinity of micrometers from an aquatic plant by combining deflection of a probe beam and fluorescence quenching. In the detection system, dissolved oxygen (DO)-quenched fluorescence was monitored together with beam deflection signals at the vicinity of the plant, then DO concentration was calculated from the fluorescence intensity. Here, three calculation methods for obtaining DO concentrations from the fluorescence intensity were examined. Results showed that exponential equations method, where fluorescent quenching coefficient and measured fluorescence intensity either with or without DO were approximated with exponential equations of temperature, gave the closest results to the measured ones by a DO sensor. The method was further applied to monitoring of oxygen and materials movement across the aquatic plants surface.

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“…Phase shift presents many advantages being an effective approach to reject noise, making the measurement insensitive to physical properties of the luminophor substrate and limiting the effects of other intensity related system issues. The drawbacks are mainly related to i) complexity, ii) sensitivity/bandwidth of the detector and iii) the luminophor needs to be continuously shined with the sinusoidal signal causing photo-bleaching in particular on sensitive organic compounds [22,23]. lifetime decay: lifetime transient can be directly sampled and measured to calculate the recombination exponential mean lifetime, thus directly achieving the value of interest.…”

Section: Fluorescence Led-based Sensorsmentioning

confidence: 99%

Study and Development of a Fluorescence Based Sensor System for Monitoring Oxygen in Wine Production: The WOW Project

Trivellin¹,

Barbisan²,

Badocco³

et al. 2018

Preprint

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Abstract:The importance of oxygen in the winemaking process is widely known, as it affects the chemical aspects and therefore the organoleptic characteristics of the final product. Hence, it is evident the usefulness of a continuous and real-time measurements of the levels of oxygen in the various stages of the winemaking process, both for monitoring and for control. The WOW project has focused on the design and the development of an innovative device for monitoring the oxygen levels in wine. This system is based on the use of an optical fiber to measure the luminescent lifetime variation of a reference metal/porphyrin complex, which decays in presence of oxygen. The developed technology results in a high sensitivity and low cost sensor head that can be employed for measuring the dissolved oxygen levels at several points inside a wine fermentation or aging tank. This system can be complemented with dynamic modeling techniques to provide predictive behavior of the nutrient evolution in space and time given few sampled measuring points for both process monitoring and control purposes. The experimental validation of the technology has been first performed in a controlled laboratory setup to attain calibration and study sensitivity with respect to different photo-luminescent compounds and alcoholic or non-alcoholic solutions, and then in an actual case study during a measurement campaign at a renown Italian winery.

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Phase fluorometric dissolved oxygen sensor

Cited by 179 publications

References 9 publications

Real-time in-situ Simultaneous Monitoring of Dissolved Oxygen and Materials Movements at a Vicinity of Micrometers from an Aquatic Plant by Combining Deflection of a Probe Beam and Fluorescence Quenching

Real-time in-situ Simultaneous Monitoring of Dissolved Oxygen and Materials Movements at a Vicinity of Micrometers from an Aquatic Plant by Combining Deflection of a Probe Beam and Fluorescence Quenching

Real-time in-situ simultaneous monitoring of dissolved oxygen and materials movements at vicinities of an aquatic plant by fluorescence quenching/deflection with an improved calculation method

Study and Development of a Fluorescence Based Sensor System for Monitoring Oxygen in Wine Production: The WOW Project

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