Дискриминация газовых компонентов и кластеров
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.
