| Laser-induced plasma spectroscopy(LIPS) is a rising method of atomic emission spectroscopy. comparing with atomic absorption spectroscopy(AAS),photoelectric direct reading spectrometry and inductively coupled plasma optical emission spectrometry(ICP-OES),the method has many advantages,such as no sample preparation,simplicity, allowing in situ analysis ,identifing many elements with one pulse etc. LIPS meets the demand of rapid and real-time analysis in industry and agriculture.In this paper ,we introduce Laser-induced plasma spectroscopy development at home and abroad in nearly two decades . the basic principle of LIPS , main factor influencing the spectrum and LIP parameter ( electronic density , temperature ) measurement were discussed .we have build and tested the LIPS system with copper, magnalium and steel as samples. stability of spectra,the mechanism of background radiation , influence of ambient atmospheres were detected and analyzed. The spectrum of the metal materials were analyzed by Specline software. Experiment results show that proper delay time and ambient atmospheres of argon can notably enhance signal-to-noise ratio of spectra ,thus the analytical of merit (detection limits,precision,and accuracy) was improved.
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