Based On The Composition And Content Of The Target Of The Laser Plasma Emission Spectroscopy Analysis

Elemental analysis based on the emission from plasma generated by focusing a powerful laser beam on any material surface is know as laser-induced plasma spectroscopy , referred to LIPS. Laser-induced plasma spectroscopy beginning as a good method of chemical analysis because of prospect they offer for the selective, minimally destructive, lack of pretreatment of material, the speed of analysis, and high sensitivity detection and analysis of solid, liquid, aerosol, and gaseous material in real time and situ. The main parameters affecting the performance of LIPS results are as follow:laser energy density, the laser wavelength, the laser pulse width, physical and chemical properties of the sample, and the surrounding environment and the nature of gas pressure and other effects.This detailed summarization of background and research in LIPS during past 15 years, is provided in this paper .The paper introduce the theory and the characteristic of the LIPS, and three model of account the content of every element. A whole system of LIPS research has been constructed and evaluated independently .We investigated optimum experimental affect of LIPS signals, such as laser angle of incidence, rotary target, laser intensity and time delay and the detected angle of the optical fiber . On this basic ,we can find the better condition like laser intensity ,detected angle to get a better spectroscopy. Some characteristic emission of neutral atoms in excited state are identified. From this we can identified the elements of the material. On the basic of using calibration-free laser-induced plasma spectroscopy, we can calculate the content of every element ,and explain the reason of the error.