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An optical sensing method developed by a research team at the University of Warsaw relies on highly sensitive spectroscopic measurements to detect the presence or absence of formaldehyde in a person’s breath. The breath test is based on multipass spectroscopy and can detect the presence of a single molecule of formaldehyde in 1 million air particles, even in the presence of gases that can obstruct precision optical measurements.
Formaldehyde is currently under investigation as a biomarker for cancers such as lung and breast. The ability to detect it quickly and noninvasively supports the development of an inexpensive and rapid screening test.
Multipass spectroscopy increases the extent to which light interacts with a…READ MORE