Lasergestütztes Verfahren zur Bestimmung von Edelmetallkonzentrationen in Metallen
摘要
The invention pertains to a process and a device for determining the composition and concentration of elements in material samples using laser-based plasma emission spectroscopy. The process comprises the following steps: a) transformation of a portion of the material sample (20) to a plasma-like state (46) by means of a pulsed high-power laser (12) focussed on the material sample (20); b) spectral analysis of the radiation emitted by the plasma (46) using a spectrometer (26); c) measurement of the total emission spectrum (44) of the plasma (46) changing per laser pulse in one or more spectral ranges typical of the element, using a detector (40); and d) calculation of the composition and concentration of the elements based on the entire spectrum (44) of measured emissions, i.e. the sum of a number of measured individual spectra (42). The claimed device (10) comprises a high-power laser (12), a spectrometer (26) and at least one measuring head (14) with integrated radiation optics (22). The high-power laser (12) and the spectrometer (26) are geometrically and stereoscopically decoupled from the measuring head and are connected to each other via at least one waveguide.
申请公布号
DE4415381(A1)
申请公布日期
1995.11.09
申请号
DE19944415381
申请日期
1994.05.02
申请人
NIS INGENIEURGESELLSCHAFT MBH, 63452 HANAU, DE
发明人
HNILICA, KLAUS D., 63517 RODENBACH, DE;SCHNEIDER, KLAUS, DR., 68309 MANNHEIM, DE