Radiant energy – Ionic separation or analysis – With sample supply means
Reexamination Certificate
2005-04-12
2005-04-12
Berman, Jack I. (Department: 2881)
Radiant energy
Ionic separation or analysis
With sample supply means
Reexamination Certificate
active
06878932
ABSTRACT:
An improved ionization source for a mass spectrometer is constructed of stainless steel, electropolished, and electroplated with gold. Operation of a mass spectrometer with the improved ionization source results in reduced adsorption and reduced reactions between charged molecules or ions and metallic surfaces. Micro-machining before electropolishing enhances smoothness, brightness, passivation and inertness of the improved ionization source. Use of the electropolished, gold-electroplated stainless steel ionization source in a mass spectrometer reduces adsorption, degradation and decomposition of the analyte and reduces adverse ion/surface reactions, as compared to use of a conventional stainless steel ionization source. A method of reducing adsorption, degradation and decomposition of the analyte and reducing adverse ion/surface reactions in an ionization source containing an electropolished and gold-electroplated ionization source for a mass spectrometer is also disclosed. The improved ionization source remains serviceable for longer periods and is easier to clean and recondition for continued use as compared conventional mass spectrometer ionization sources.
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Berggren William R.
Berman Jack I.
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