Application of primary plasma standardization to Nd-YAG laser-induced shock wave plasma spectrometry for quantitative analysis of high concentration Au-Ag-Cu alloy

A study was performed on a laser-induced shock wave plasma generated on hig h concentration Au-Ag-Cu alloys by a Q-switched Nd-YAG laser of 4.8 mJ unde r reduced air pressure of 2 torr. It was found that the total emission inte nsity of the secondary plasma is proportional to the intensity of the prima ry plasma. Assuming linear proportionality between the intensity of the pri mary plasma and the number of atoms vaporized from the target, it is propos ed that quantitative analysis can be applied to the intensities of the anal ytical emission lines normalized by the total intensity of the primary plas ma. This experimental result demonstrated for each metal element shows an e xcellent linear relationship between the normalized emission line intensity and the content of the corresponding element. (C) 2001 Elsevier Science B. V. All rights reserved.