Stefan Weigl

Business Innovations and Communications

Stefan Weigl studied Electrical and Microsystems Engineering with a focus on analytical chemistry and optical sensor technology at the University of Applied Sciences in Regensburg, Germany. He completed his doctorate in the field of breath analysis using photoacoustic spectroscopy (PAS) to measure human breath acetone at the University of Regensburg in 2021. He is author and co-author of several peer-reviewed papers regarding photoacoustic spectroscopy and breath analysis. From 2016 until 2023 he led the breath analysis research group in the Sensorik-Applikation Centre in Regensburg investigating the detection of acetone and other breath components employing PAS. He edited and partially authored the book Breath Analysis – An Approach for Smart Diagnostics, published within Springer Link in 2022. Since October 2023 he is employed as a technology scout for a globally acting automotive supplier scouting and reviewing the technologies of tomorrow.

In the Spotlight

News & Publications

Explore our media highlights and press releases. Click through to read the full stories behind our journey and innovations.

Latest Press Releases from the American Lung Association

October 5, 2023

The American Lung Association has published its latest press releases, sharing updates and statements from the organization. These communications address various lung health issues, ongoing research, and important advocacy efforts.

American Lung Association

A versatile probe for chemoselective capture and analysis of carbonyl compounds in exhaled breath

This article presents a novel aminooxy reagent designed to capture trace aldehyde and ketone volatile organic compounds (VOCs) in exhaled breath. The reagent, 4-(2-aminooxyethyl)-morpholin-4-ium chloride (AMAH), retains carbonyl VOCs when coated on micropillars in a silicon microreactor. The captured compounds are then analyzed using mass spectrometry and gas chromatography, showcasing the method's versatility for breath analysis.

High sensitivity for lung cancer detection using analysis of exhaled carbonyl compounds

November 30, 2015

The study investigates the potential of breath analysis of carbonyl compounds as a non-invasive and cost-effective primary screening method for lung cancer. It highlights the high sensitivity and specificity of this method compared to traditional low-dose CT scans. The findings suggest promising implications for early lung cancer detection.

Normalization of Exhaled Carbonyl Compounds After Lung Cancer Resection - PMC

September 30, 2016

This study investigates the normalization of exhaled carbonyl compounds (ECCs) in patients post lung cancer resection. It highlights how these compounds can indicate lung cancer presence and the effects of surgical intervention on their levels. A substantial reduction in ECCs was observed, suggesting a potential utility in postoperative monitoring for lung cancer recurrence.

PubMed Central (PMC)

A feasibility study on exhaled breath analysis using UV spectroscopy to detect COVID-19

October 1, 2023

Our feasibility study demonstrates that a single UV absorbance measurement of a concentrated breath sample has promise as a screening approach to detect increased levels of carbonyl compounds, which may be indicative of a disease state such as COVID-19.

Detection of COVID-19 by quantitative analysis of carbonyl compounds in exhaled breath

UHPLC-MS in combination with a MEMS-fabricated silicon microreactor was used to analyze carbonyl compounds in exhaled breath to differentiate COVID-19 positive and negative subjects. The sensitivity increased when modeling variants separately. The overall results are promising for SARS-CoV-2 detection. When all positive (both Alpha and Delta) and all negative samples were used for training a logistic regression algorithm, the model still achieved 90.1% sensitivity, 98.3% specificity and 94.7% accuracy.

Scientific Reports

Analysis of a Broad Range of Carbonyl Metabolites in Exhaled Breath by UHPLC-MS

The combination of a silicon microreactor for the selective capture of carbonyl compounds with UHPLC-MS analysis may provide a quantitative method for the analysis of carbonyls to identify disease markers in exhaled breath.

ACS Publications

Breath Diagnostics

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