MEASUREMENT OF GASEOUS COMPOUND USING SPECTROSCOPY

• Main Authors: TOIVONEN, JUHA, SILVENNOINEN, JAANI, ROPPO, JUHA, ENESTAM, SONJA, SORVAJARVI, TAPIO
• Format: Patent
• Language: English; French
• Published: 12.12.2013
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

A method for measuring the content of a gas compound from a gas mixture. The method comprises guiding a light beam (170) to a first optical path (160), whereby the light beam (170) is attenuated to an attenuated light beam (175) and detecting a first value indicative of a first intensity (lk0) of the attenuated light beam (175). The method further comprises generating a last light pulse (710), dissociating at least part of the gas compound molecules (optionally excited) or dissociated parts thereof (optionally excited) on the first optical path (160) to first part atoms, molecules, ions, or radicals, and to another part using the last light pulse (710), whereby the light beam (170) is further attenuated by absorption to the first part atoms, molecules, ions, or radicals on the first optical path (160). The method further comprises detecting a second value indicative of a second intensity (lk) of the attenuated light beam (175) and determining, using the first value and the second value, the gas compound content of the gas mixture. A device (990) for measuring the content of a gas compound from a gas mixture by the method.