Method of correcting componential concentration in expiration and expiration analyzer

摘要

A first sample measuring passage(12) provided between a collection port(4) and a suction pump(10) has a sample gas measurer(14) for measuring expiration components, while a second sample measuring passage(16) which is provided in parallel with the first sample measuring passage(12) has a standard gas measurer(18) for measuring O2 gas. Assuming that [A] represents a measured value of a target component in an expiration sample and [b1] represents O2 concentration in the expiration sample, correction is made on the basis of: [A'] = f1.(21-[a1])[A]/(21-[b1] where [A'] represents the corrected measured value of the target component, [a1] represents O2 concentration in end-tidal air which is supplied as a constant such as 15.3, for example, and f1 represents an experimentally prescribed coefficient such as 1.67, for example. IMAGE