Patent ID: 7260484

Claim:
A method for carrying out analyses of a gas comprising one or more species S i (i=1, . . . , n) by using ion mobility spectrometry, the method comprising: carrying out a first test with a first set of values of experimental parameters; carrying out a second test with a second set of values of the experimental parameters, changing only one parameter chosen among the concentration [S i ] of the species giving rise to ions S i + (i=1, . . . , n), a residence time of the ions in the reaction zone and the residence time of the ions in the drift zone of an ion mobility spectrometer; employing the data obtained in the two tests in a relation expressing a charge transferred by the i-th ion to the detector of the spectrometer C Si + as a function of test parameters, thereby obtaining two equations; dividing the two equations by one another, to elimination from the calculation invariant parameters and to obtain as a result of the division at least one parameter that can then be reintroduced in each of the two equations above, and outputting the concentration [S i ] of at least one of the species S i (i=1, . . . , n).