Дискриминация газовых компонентов и кластеров

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One of the serious problems in analytical mass spectrometry is the interferences between clusters and  gas components and components of sample. These interferences make parameters of mass spectral  analysis worse. The present paper describes a new approach for the reduction of such interferences  by using pulsed glow discharge which allows the temporal discrimination of interfering components.  Infl  uence of hydrogen on dynamic discrimination of various gas components is considered. It was  possible to decrease the relative intensity of gas and clusters components by several orders of magnitude. In particular, optimum conditions (pressure in discharge cell, addition of hydrogen, repelling pulse  delay) allow effective suppressing the  40 Ar + component which makes possible the measurement calcium  in metallurgical silicon.

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