Peer Reviewed: Oxygen Sensors Based on Luminescence Quenching.

Demas, J. N.; DeGraff, Β. A.; Coleman, Patricia B.

doi:10.1021/ac9908546

Cited by 259 publications

(165 citation statements)

References 31 publications

(25 reference statements)

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“…Intensity-based measurements are technically easier to do, but they can drift over time. The different signal detection techniques are summarized by Wolfbeis (1991), Demas et al (1999), and Glud et al (2000) along with a wide range of applications. Klimant et al (1995) and Stokes and Romero (1999) described intensity-based oxygen optodes and their use.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a lifetime‐based optode to measure oxygen in aquatic systems

Tengberg

Hovdenes

Andersson

et al. 2006

Limnology & Ocean Methods

214

199

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In this article, we evaluate the performance of a commercially available lifetime-based optode and compare it with data obtained by other methods. We performed a set of 10 different tests, including targeted laboratory evaluations and field studies, covering a wide range of situations from shallow coastal waters and wastewater treatment plants to abyssal depths. Our principal conclusion is that, owing to high accuracy (± 2 µM), long-term stability (more than 20 months), lack of pressure hysteresis, and limited cross-sensitivity, this method is overall more suitable for oxygen monitoring than other methods.

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Section: Introductionmentioning

confidence: 99%

Evaluation of a lifetime‐based optode to measure oxygen in aquatic systems

Tengberg

Hovdenes

Andersson

et al. 2006

Limnology & Ocean Methods

214

199

View full text Add to dashboard Cite

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“…This silica material possesses a pH-adjustable cation exchange capacity, which allowed for ionic binding with the Ru(Ph 2 phen 3 )Cl 2 luminophore [39], and high polarity, which gave rise to an increased quenching rate [40]. OSBs calibrated at different oxygen tensions showed linearity in the Stern-Volmer relationship for beads suspended in a liquid monolayer or in the presence of a turbid agarose spacer.…”

Section: Discussionmentioning

confidence: 99%

Fluorescent oxygen sensitive microbead incorporation for measuring oxygen tension in cell aggregates

et al. 2013

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Molecular oxygen is a main regulator of various cell functions. Imaging methods designed as screening tools for fast, in situ, 3D and non-interfering measurement of oxygen tension in the cellular microenvironment would serve great purpose in identifying and monitoring this vital and pivotal signalling molecule. We describe the use of dual luminophore oxygen sensitive microbeads to measure absolute oxygen concentrations in cellular aggregates. Stable microbead integration, a prerequisite for their practical application, was ensured by a site-specific delivery method that is based on the interactions between streptavidin and biotin. The spatial stability introduced by this method allowed for long term measurements of oxygen tension without interfering with the cell aggregation process. By making multiple calibration experiments we further demonstrated the potential of these sensors to measure local oxygen tension in optically dense cellular environments.3

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“…The oxygen content in the headspace was monitored using a fluorescence-based O 2 sensor. 28,29 Fig. 4 shows the expected theoretical O 2 partial pressure versus the measured O 2 partial pressure in the headspace.…”

Section: Faradaic Efficiency (Fe) Validationmentioning

confidence: 99%

Gastight Hydrodynamic Electrochemistry: Design for a Hermetically Sealed Rotating Disk Electrode Cell

et al. 2016

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Rotating disk electrodes (RDEs) are widely used in electrochemical characterization to analyze the mechanisms of various electrocatalytic reactions. RDE experiments often make use of or require collection and quantification of gaseous products. The combination of rotating parts and gaseous analytes makes the design of RDE cells that allow for headspace analysis challenging due to gas leaks at the interface of the cell body and the rotator. In this manuscript we describe a new, hermetically-sealed electrochemical cell that allows for electrode rotation while simultaneously providing a gastight environment. Electrode rotation in this new cell design is controlled by magnetically coupling the working electrode to a rotating magnetic driver. Calibration of the RDE using a tachometer shows that the rotation speed of the electrode is the same as that of the magnetic driver. To validate the performance of this cell for hydrodynamic measurements, limiting currents from the reduction of a potassium ferrocyanide (K 4 [Fe(CN) 6 ] 3H 2 O) were measured and shown to compare favorably with calculated values from the Levich equation and with data obtained using more typical, non-gastight RDE cells. Faradaic efficiencies of ~95% were measured in the gas phase for oxygen evolution in alkaline media at an Inconel 625 alloy electrocatalyst during rotation at 1600 rpm. These data verify that a gastight environment is maintained even during rotation.

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Peer Reviewed: Oxygen Sensors Based on Luminescence Quenching.

Abstract: Optical oxygen sensors are being used in applications ranging from blood gas analysis to pressure measurements in wind tunnels.

Cited by 259 publications

References 31 publications

Evaluation of a lifetime‐based optode to measure oxygen in aquatic systems

Evaluation of a lifetime‐based optode to measure oxygen in aquatic systems

Fluorescent oxygen sensitive microbead incorporation for measuring oxygen tension in cell aggregates

Gastight Hydrodynamic Electrochemistry: Design for a Hermetically Sealed Rotating Disk Electrode Cell

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