Non-invasive and Time-dependent Blood-sugar Monitoring via Breath-derived CO 2 Correlation Using Gas Chromatograph with a Milli-whistle Gas Analyzer

A clear and positive correlation between the CO 2 concentration and the blood-sugar level has been observed via a noninvasive and time-dependent monitoring of CO 2 concentration from human breath, which is carried out by using a homemade gas chromatography (GC)/milli-whistle compact analyzer. The time-dependent sampling of the CO 2 concentration correlated between 5.0 to 5.6% (1% = 104 ppm) in accordance with blood-sugar level variations of 80 to 110 mg/dL. The analytical method results in a rapid, continuous and non-invasive determination of blood-sugar level via measurement of the CO 2 concentration exhaled from the lungs.