METHOD FOR DETECTING AND IDENTIFYING AN ANALYTE PRESENT IN A GASEOUS MEDIUM

摘要

The invention relates to a method for detecting and identifying an analyte present in a gaseous medium. To this end, a detector is used, said detector having at least three sensors each including a transducer associated with a sensitive material capable of adsorbing one or more analytes, the transducers being, respectively, an optical transducer and two gravimetric transducers that are different from one another. Each of the sensors emits a signal in the absence of the analyte, adsorption of said analyte by the sensitive material of a sensor producing a variation of the signal emitted by said sensor. The method includes contacting the detector with the gaseous medium and acquiring and analyzing, synchronously and repetitively, the signals emitted by the sensors during said contacting in order to obtain, for each sensor, a curve representing the signal emitted by said sensor as a function of time. If a variation in the signal emitted by at least one of the sensors beyond at least one threshold S, in absolute value, and which is previously set for said sensor, is detected, the analyte absorbed by the sensitive material of said sensor is identified by comparing the adsorption kinetics obtained for said sensor with a plurality of adsorption kinetic models previously established for each of the analytes likely to be detected by said sensor.