Photo-ionization detectors and associated methods thereof

摘要

A photo ionization detector (PID) (1) is provided for selectively determining various compounds or gases present in a breath sample. The PID, comprises a substrate (10) comprising a gas ionization chamber (4), at least one pair of ion sensing electrodes (6), and at least one amplifying circuit (12); and an ultraviolet (UV) ionization source (2) to transmit a UV light beam into the gas ionization chamber. A system comprises the PID is also provided. A method of detecting a response pattern for various compounds or gases in breath using PID is also provided.