Question

on which component of a chemical sensor the ‘selectivity’ and ‘sensitivity’

depend? How?​

Answer 1

Answer:

The sensitivity and selectivity aspects of chemical sensing are affected by the phase, dimensional, and temporal aspects of the desired determination.

Explanation:

The analyte can be present in a gas, liquid, or solid phase on various dimensional scales ranging from bulk volumes of liters to picoliters, or surface layers from nanoscopic to monomolecular scale. It may also be persistent or transitory. A further set of requirements can originate from a need for repetitive measurements of the analyte over long times (e.g., days, months) or at multiple and perhaps remote locations, such as in environmental analysis and personal monitoring. 1 The design of chemical sensors also requires appreciation of the needed degree of quantitative reliability (precision or accuracy). Finally, economic resources and constraints can affect the design and strategy of any sensing task in many different ways.

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