BASIC INVESTIGATIONS OF NANOSECOND LASER-INDUCED PLASMA EMISSION KINETICS FOR QUANTITATIVE ELEMENTAL MICROANALYSIS OF HIGH ALLOYS

The new application of time-resolved laser-induced breakdown spectrometry (TRELIBS) to the direct undamaged qualitative and quantitative analysis of tertiary high-alloys (gold jewels) has been studied, A plasma was formed by using a low energy (10 mJ, 10 ns) Q-switched Nd:YAG laser in atmospheric air, The plasma emission was measured by a 0.6 m polychromator and a computer controlled gated optical multichannel detector system, The TRELIBS system greatly improved the line-to-background ratios, This investigation was carried out over a wide spectral range in the ultraviolet and visible region for the analytical line pairs of copper-gold, silver-gold and copper-silver.