Determination of Carbon Content in Steel Using Laser-Induced Breakdown Spectroscopy
Abstract:Laser-induced breakdown spectroscopy has been used to determine carbon content in steel. The plasma was formed by focusing a Nd:YAG laser on the sample surface. With the use of time-resolved spectroscopy and generation of the plasma in nitrogen atmosphere, a precision of 1.6% and a detection limit of 65 ppm have been obtained. These values are similar to those of other accurate conventional techniques. Matrix effects for the studied steels are reduced to a small slope difference between the calibration curves for stainless and nonstainless steels.
Document Type: Research Article
Affiliations: Cátedra de Fisica Atómica, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
Publication date: September 1, 1992
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