Expiration collecting method and automatic expiration collector.

摘要

A syringe(12) for collecting expiration is switched to be connected to by a three-way electromagnetic valve(10) between an expiration blowing part(2) and a measuring part(14), so that expiration blown from the expiration blowing part(2) is collected in the syringe(12) while replacing old expiration, and a switching valve(18) is closed upon completion of exhalation so that end-tidal air is collected in the syringe(12). Thereafter the expiration sample is introduced into the measuring part(14) from the syringe(12) so that a constant amount of the expiration sample is collected by the measuring part(14) to be introduced into a column(24). <IMAGE>