Proengin Sa

Henri Lancelin

Pierre Clausin

Gilles Guene

Patrick Bleuse

The sampling system of the invention includes a column comprising a first separator associated with a first collector so as to extract particles whose diameter is larger than a first diameter, and a second separator associated with a second collector which eliminates the finest particles and concentrates the other particles in the gas flow sucked up by the suction pipe of an analysis device.

System for taking a gas sample able to contain particles of suspended materials

The present method uses a spectrophotometric and/or ionisation detection device in which the gas to be analyzed and illuminated by a light source emitting in a range of wavelengths distinct from the one used for spectrophotometry so as to carry out a nephelometric and/or turbidimetric detection, the results of this detection being used to carry out an adjustment of the device for counting the particles and/or for determining the composition of these particles.

Method and device for analysing a gas likely to contain particles or suspended aerosols

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

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Morangis, France

Henri Lancelin