Sensor systems for breathprinting: A review of the current technologies for exhaled breath analysis based on a sensor array with the aim of integrating them in a standard and shared procedure

In breath analysis, two different and complementary approaches may be used for a system based on an array of sensors. The first one relies on the use of selective sensors in order to recognize one or a few specific VOCs. The second approach, which is the most implemented, employs cross-reactive sensors in order to extract global qualitative information about the considered sample, instead focusing on a single parameter. This chapter examines the state of the art and the latest technologies regarding sensors and interfaces involved in the detection of volatile compounds.