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PROCESS AND APPARATUS FOR MEASURING AN ORGANIC SOLID SAMPLE BY GLOW DISCHARGE SPECTROMETY
PROCESS AND APPARATUS FOR MEASURING AN ORGANIC SOLID SAMPLE BY GLOW DISCHARGE SPECTROMETY
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机译:辉光放电光谱法测定有机固体样品的方法和装置
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摘要
The present invention relates to a system and a process for measuring, by glow discharge spectrometry, the elemental and/or molecular chemical composition of an organic solid sample (10). According to the invention: the sample (10) is positioned so as to seal a glow discharge plasma reactor (2), a gaseous mixture comprising at least one inert gas and gaseous oxygen in injected into the reactor (2), the concentration of gaseous oxygen being between 0.1% and 15% by weight of the gaseous mixture, an electric discharge of radiofrequency type is applied to the electrodes of the plasma reactor (2) in order to generate a glow discharge plasma, and the solid sample (10) is exposed to said plasma so as to etch an erosion crater in the solid sample (10); at least one signal representative of an ionized species of negative charge is selected and measured using a mass spectrometer (4).
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