Ion-selective electrodes based on silver sulphide

Veselý, Jozef; Jensen, O.J.; Nicolaisen, B.

doi:10.1016/s0003-2670(01)80977-6

Cited by 69 publications

(15 citation statements)

References 16 publications

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“…The rate of oxygen consumption shows limitation at higher PO∑ with an apparent P50 near 2·kPa whereas the apparent P50 for sulfide consumption is approximately 1·kPa; data fitted by Michaelis-Menten equation. Measurement of mitochondrial sulfide consumption detect S 2-in solution at strongly alkaline pH (Vesely et al, 1972). Recent work in which it was used to determine the maximum sulfide consumption rate of a protozoan over a range of steady state sulfide concentrations suggests that it may also be sensitive to submicromolar concentrations of HS - (Searcy and Peterson, 2004).…”

Section: Polarographic Sulfide Sensormentioning

confidence: 99%

Sulfide consumption by mussel gill mitochondria is not strictly tied to oxygen reduction: measurements using a novel polarographic sulfide sensor

Kraus

Doeller

2004

Journal of Experimental Biology

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conditions, oxygen and sulfide consumption are matched. Under hypoxic to anoxic conditions, however, sulfide consumption continues without commensurate oxygen consumption, and these results can be duplicated at higher oxygen conditions by selective blockade of terminal oxidases. These metabolic capabilities depend on prior environmental sulfide exposure, which suggests substantial mitochondrial metabolic plasticity. The recent finding that endogenous sulfide is a critical cell signaling molecule in all organisms suggests that the metabolic pathways that tightly control cellular sulfide levels are widespread. Sensors that accurately report sulfide concentrations under physiologically relevant conditions are valuable tools with which to explore the expanding role of sulfide in biological systems.

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Section: Polarographic Sulfide Sensormentioning

confidence: 99%

Sulfide consumption by mussel gill mitochondria is not strictly tied to oxygen reduction: measurements using a novel polarographic sulfide sensor

Kraus

Doeller

2004

Journal of Experimental Biology

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“…Of course, the situation is different if the total concentration of ions is large and a very low concentration of free ions is kept constant by using ion buffers. If the equilibrium is fast enough, very low concentrations of free ions may nominally be measured by potentiometry (e.g., a solid state Ag 2 S ISE showed a potentiometric response to a calculated activity of 10 −25 M Ag + in an ion buffer consisting of 0.1 M Na 2 S and 1.0 M NaOH [31,32]). …”

Section: Ion-selective Microelectrodes and Nanoelectrodesmentioning

confidence: 99%

Nanoscale potentiometry

Bakker

Pretsch²

2008

TrAC Trends in Analytical Chemistry

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Potentiometric sensors share unique characteristics that set them apart from other electrochemical sensors. Potentiometric nanoelectrodes have been reported and successfully used for many decades, and we review these developments. Current research chiefly focuses on nanoscale films at the outer or the inner side of the membrane, with outer layers for increasing biocompatibility, expanding the sensor response, or improving the limit of detection (LOD). Inner layers are mainly used for stabilizing the response and eliminating inner aqueous contacts or undesired nanoscale layers of water. We also discuss the ultimate detectability of ions with such sensors and the power of coupling the ultra-low LODs of ion-selective electrodes with nanoparticle labels to give attractive bioassays that can compete with state-of-the-art electrochemical detection.

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“…Buck argued that this is probably caused by impurities in the sensing material [16], but clear improvements in such systems still need to be made [18]. As with the polymeric membrane systems mentioned above, in the classical literature, impressively low LODs with such membrane materials were achieved using only ion-buffered systems, and not dilute solution of the analyte ion [52][53][54].…”

Section: Solid-state and Glass Membranes With Low Lodsmentioning

confidence: 99%

Potentiometric sensors for trace-level analysis

Bakker

Pretsch

2005

TrAC Trends in Analytical Chemistry

305

123

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This review summarizes recent progress in the development and application of potentiometric sensors with limits of detection (LODs) in the range 10 −8 -10 −11 M. These LODs relate to total sample concentrations and are defined according to a definition unique to potentiometric sensors. LODs calculated according to traditional protocols (three times the standard deviation of the noise) yield values that are two orders of magnitude lower. We are targeting this article at analytical chemists who are non-specialists in the development of such sensors so that this technology may be adopted by a growing number of research groups to solve real-world analytical problems.We discuss the unique response features of potentiometric sensors and compare them to other analytical techniques, emphasizing that the choice of the method must depend on the problem of interest. We discuss recent directions in sensor design and development and present a list of 23 sensors with low LODs, with references. We give recent examples where potentiometric sensors have been used to solve trace-level analytical problems, including the speciation of lead and copper ions in drinking water, the measurement of free copper in sea water, and the uptake of cadmium ions by plant roots as a function of their speciation.

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Ion-selective electrodes based on silver sulphide

Cited by 69 publications

References 16 publications

Sulfide consumption by mussel gill mitochondria is not strictly tied to oxygen reduction: measurements using a novel polarographic sulfide sensor

Sulfide consumption by mussel gill mitochondria is not strictly tied to oxygen reduction: measurements using a novel polarographic sulfide sensor

Nanoscale potentiometry

Potentiometric sensors for trace-level analysis

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