Abstract
New devised metal subtarget technique has been developed for specific applications of liquid analysis. Experimentally, liquid material was homogeneously poured on a surface of metal plate, which functions as a metal subtarget. The metal surface was then dried using drying machine. When a pulse CO2 laser (10.64 μm) was irradiated on a metal subtarget, a large-volume plasma was induced. During laser irradiation, a material target was vaporized and moved into the plasma region to be dissociated and excited. The technique was successfully used to identify major elements such as Ca and Mg in cement and to identify light elements such as C and H in gasoline liquid. Finally, the technique was also successfully employed to detect impurity element of Ca in human blood. This method is very potential to be applied for the analysis of liquid without tedious sample pretreatment.
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