Tuzson B Jágerská J Looser H Graf M Felder F Fill M Tappy L Emmenegger L 2017 A broadly tunable mid-infrared vertical-external-cavity surface-emitting laser (VECSEL) is employed in a direct absorption laser spectroscopic setup to measure breath acetone. The large wavelength coverage of more than 30 cm-1 at 3.38 μm allows, in addition to acetone, the simultaneous measurement of isoprene, ethanol, methanol, methane, and water. Despite the severe spectral interferences from water and alcohols, an unambiguous determination of acetone is demonstrated with a precision of 13 ppbv that is achieved after 5 min averaging at typical breath mean acetone levels in synthetic gas samples mimicking human breath. application/pdf https://sonar.ch/global/documents/46336 eng info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.analchem.6b04511 info:eu-repo/semantics/altIdentifier/pmid/28514136 info:eu-repo/semantics/openAccess Analytical chemistry. - 2017 Breath Tests Humans Lasers Surface Properties Volatile Organic Compounds Highly Selective Volatile Organic Compounds Breath Analysis Using a Broadly-Tunable Vertical-External-Cavity Surface-Emitting Laser. http://purl.org/coar/resource_type/c_6501