| 摘要 |
A method for determining the molecular mass M of at least a chemical element at the output of a mass spectrometer which includes a dissociation box where the ions of an element supplied by an ion source are dissociated into several fragments, an electrostatic analyzer where the fragments are subjected to an electric field so as to select fragments having a predetermined specific mass (mi) according to the electric field and a detector for detecting the fragments at the output of the electrostatic analyzer. The method includes calculating a ratio between the masses of two unknown fragments for all the possible couples of fragment masses, comparing each of the ratios obtained with the mass ratios of standard fragments corresponding to the compounds currently obtained by dissociation of a particular element, and the determining the mass M of the element using the ratios of unknown fragments which are equal to the ratios of the standard fragments.
|
