Detection of the Freshness of Kiwifruit With a TD-GC-MS and a Gas-Sensing Array Based on the Surface-Acoustic-Wave Technique.

An electronic nose is an arrayed gas sensor mimicking the human olfactory system that can analyze and identify a flavour on collecting an odour from an environment. In our experiments, an electronic-nose system based on a surface acoustic wave (SAW) was used to measure the freshness of kiwifruit. 128° YX-LiNbO acted as a piezoelectric material; Au was deposited as an electrode and sensing area.