Abstract
This chapter is focused on green aspects of the use of (bio)chemical sensors for qualitative and quantitative analysis applications. After discussing the aspects that connect chemical sensors and biosensors with the main trends of green analytical chemistry, a set of paradigmatic examples of top sustainable assays pertaining to the (bio)sensing field are selected and explored in some of their variants. These are the use of greener types of nanoparticles for chemical assays, colorimetric assays coupled with reading using a smartphone camera, the use of a portable glucose meter as a transducer for other assays different to glucose, the use of biofuel cells for estimating organic load and toxicity and finally the coupling of sensor arrays with machine learning algorithms for gas sensing (electronic noses) and liquid monitoring (electronic tongues).
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