Skip to main content
. 2018 Jul 16;18(7):2298. doi: 10.3390/s18072298

Figure 2.

Figure 2

Figure 2

Search results of literature review (2017–2019) of the exhaled acetone analysis: (a) different methods: 1 Selected-ion flow-tube mass spectrometry; 2 Gas Chromatograph—Ion Mobility Spectrometer; 3 Proton-transfer-reaction mass spectrometry; 4 Gas chromatograph—mass spectrometry (b) different materials used as receptors in sensor applications presented in papers.