Dr. Stefan Weigl received his master’s degree in engineering (M. Eng.) from the Ostbayerische Technische Hochschule (OTH) of Regensburg in Germany in 2016. In the course of his master thesis, he started his research on the photoacoustic gas sensing technique in 2015. He received his Doctorate of Natural Sciences (Dr. rer. nat.) in 2021 at the faculty of chemistry and pharmacy of the University of Regensburg. Within his PhD thesis, he investigated the applicability of UV LEDs and IR lasers for the photoacoustical detection of acetone in human breath exhale. Currently, Dr. Stefan Weigl is part of the photoacoustic team of the Sensorik-Applikationszentrum (SappZ), which is located at the Ostbayerische Technische Hochschule (OTH) of Regensburg and supervises the breath analysis research group.

• Physio-Metabolic Monitoring via Breath Employing Real-Time Mass Spectrometry: Importance, Challenges, Potentials, and Pitfalls.- Offline Breath Analysis: Standardization of Breath Sampling andAnalysis Using Mass Spectrometry and Innovative Algorithms.- Ion Mobility Spectrometry in Clinical and Emergency Setting: Research and Potential Applications.- Infrared Sensing Strategies: Toward Smart Diagnostics for Exhaled Breath Analysis.- Scopes and Limits of Photoacoustic Spectroscopy in Modern Breath Analysis.- Advances of Semiconductor Gas Sensing Materials, Structures,and Algorithms for Breath Analysis.- Breath Analysis as Part of Pulmonary Function Diagnostics.

“An excellent contribution to breath analysis not only for analytical chemists but also for anybody interested in novel diagnostic approaches and point-of-care testing concepts … . The compilation of chapters is a great inspiration for analytical scientists and researchers … .” (Sabine Szunerits, Analytical and Bioanalytical Chemistry, Vol. 415 (8), 2023)