Application of membrane extraction with sorbent interface for breath analysis.

Area of Science:

• Analytical Chemistry
• Biomedical Engineering
• Clinical Diagnostics

Background:

• Volatile organic compounds (VOCs) in breath offer non-invasive diagnostic potential.
• Traditional breath analysis methods face technical limitations in selectivity and sensitivity.
• Membrane extraction with a sorbent interface (MESI) presents an advantageous alternative for breath analysis.

Purpose of the Study:

• To develop a simple, reproducible sampling device and method for breath analysis using MESI.
• To validate the feasibility and effectiveness of the MESI system with human breath samples.
• To establish breath CO2 as an internal standard for normalizing VOC concentrations in breath.

Main Methods:

• Development of a novel sampling device based on the MESI system.
• Testing the MESI system with real human breath samples.
• Utilizing breath CO2 as an internal standard to account for variations in breathing patterns and sample loss.

Main Results:

• Successfully developed and validated a MESI-based breath sampling method.
• Demonstrated effective normalization of breath acetone concentrations using CO2 as an internal standard.
• Obtained breath acetone profiles consistent with existing literature for healthy individuals.

Conclusions:

• The MESI system provides a viable, non-invasive method for breath analysis.
• Normalization to CO2 effectively addresses variations in breath sample analysis.
• This technique shows promise for monitoring biomarkers, such as acetone in diabetic patients.