Titlebook: Chemical Sensors; T. E. Edmonds Book 1988 Springer Science+Business Media New York 1988 biological.chemical sensor.chemistry.development.i

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Molecular and ionic recognition by chemical methodsructurally related molecules (Figure 2.1). The substrate may be a cation or anion (ionic recognition) or a neutral molecular species (covalent recognition). Successful selective receptor—substrate or host—guest complex formation results when the two species complement each other both in size and sha

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Organic sensor materials in entangled and polymer-bound matrices for ion-selective electrodesse range of materials suitable for other sensor electrodes has been reported (6–8). Their sensor membranes are conveniently classified on the basis of fixed or mobile exchanger sites respectively. This review concerns some fundamental aspects (particularly regarding the synthetic design of sensor ma

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Chemically modified electrodesry could be analytically useful. However, it was not until the introduction of a practical, reproducible working electrode, the dropping mercury electrode (DME), that the analytical utility of the technique was realised. The DME alleviated problems associated with surface phenomena which complicated

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Selective chemical transduction based on chemoreceptive control of membrane ion permeabilityceptor cells (1). Examples of the former are the postsynaptic membrane in neurons which is influenced by the neurotransmitter acetylcholine (2), and the protein insulin which interacts with receptors for control of the glucose level. External sensory processes of great significance are the senses of

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Potentiometric transducersanalyte. Many types of electrodes exist (see Table 9.1), but those based on membranes are by far the most useful analytical devices. The broader field of potentiometry has been reviewed recently (1). The potential of the indicator electrode cannot be determined in isolation, and another electrode (a

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MOSFET devices Lundstrom (1) in 1975. Work since then has been based mainly on MOS devices having various transition-metal gate electrodes, primarily for the sensing of hydrogen-containing gases, although some work has been reported on the sensing of carbon monoxide with these devices. These sensors are based on

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