Abstract
In order to investigate the possibility of analysis of a major element in an alloy in laser microprobe analysis, spatially resolved spectral measurements of a plasma produced by a Q-switched Nd: YAG laser were carried out in argon and helium atmospheres under reduced pressures from 3 to 1013 hPa. The experimental results showed that at an observation height of 1.5mm above the sample surface, the linear calibration curve with a slope of unity was obtained for the analysis of copper (concentration: 53.5-95.0%) in brass samples, in both argon and helium under a reduced pressure of 3 hPa.
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