APPARATUS COMBINING SPECTROPHOTOMETRY AND FLAME IONISATION DETECTION FOR ANALYSING A GAS COMPOSITION

摘要

The invention concerns an apparatus comprising an intake scoop (2) for the gas sample to be analysed and, coaxial to said scoop (2): two tubular sleeves (4) defining respectively an intake chamber (5) for an oxygen carrier gas opening into a first combustion chamber (8), and an intake chamber (11) for an oxidant gas opening into a second combustion chamber (9); a pair of electrodes (14) associated with a circuit (21) measuring the conductivity of a combustion zone located in the second combustion chamber (9) and focusing optics (19) focusing the image of the flame generated in the combustion chambers (8, 9) on the input orifice of a spectrophotometer (20); a processor (25) processes the data from the circuit (21) and from the spectrophotometer (20) to deduce therefrom the concentration in the searched elements. The invention is particularly useful for detecting sulphur, phosphorus and organic compounds.