FIELD: mass spectrometry. SUBSTANCE: ionizer and evaporator are fired till stabilization of background lines is achieved. Matter to be analyzed is placed into evaporator. Position of ionizer is regulated so that its outlet hole is at distance 0.3-0.5 outer diameter of ionizer along its axis from cathode tip facing ionizer. Ionizer and evaporator are heated and measurement of ion current of isotopes of various elements is conducted with gradual change of evaporator temperature. EFFECT: improved authenticity of mass spectrometric analysis. 1 tbl
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