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. Author manuscript; available in PMC: 2019 Sep 18.
Published in final edited form as: Anal Chim Acta. 2018 Feb 9;1024:18–38. doi: 10.1016/j.aca.2018.01.069

Figure 2:

Figure 2:

Mass spectrometry publication comparisons

This chart compares the number of publications for LC-MS, Direct-MS, GC-MS and sensors over the past 20 years. All publications in breath research show an upward trend, with most publications reporting breath research results utilizing GC-MS and sensors in recent years.