| 摘要 |
Detecting chemical species of interest using a FLAIR (flame infra-red) system 100. An infra-red optical beam 109 which may be produced by a Fourier Transform Infra-red Spectrophotometer (FTIR Spectrophotometer) 120 is passed through a flame 101 produced on a burner head 103. A chemical sample is introduced into the flame 101 via aspirator 107. The absorption spectrum of the infra-red radiation is measured after the radiation has passed through the flame 101, wherein the spectrum is indicative of certain species. The flame 101 may be a cool flame. The spectrum may be measured by measuring the intensity of the infra-red radiation at a specific polarization angle. The aspirator 107 may introduce the sample into a mixing chamber 105 which contains three ports positioned for a fuel and oxidant provided by supply member 113, as well as a liquid drain. A computer 130 may be operable for data capture and analysis. |
