Method for analysis of expired gas

摘要

The invention comprises a method for detecting and measuring volatile components in expired gas by sampling the expired gas containing said volatile components; passing infrared radiation from an interferometer through the sample; detecting infrared radiation transmitted from the sample to produce a signal characteristic for said volatile components in the sample; and processing said signal and a set of single component reference library spectra of pure molecular gases in order to detect and calculate the amount of said volatile components in the blood of an individual expiring said gas, comprising the use of a low resolution FT-IR spectrometer in said detecting and processing.