Research progress in quantitative analysis of laser-induced breakdown spectroscopy combined with chemometrics in metallurgical system
Metallurgical analysis is an indispensable step in metallurgical production process,and it is also an important basis and technical means for the raw material selection,smelting process control and product in-spection.In order to meet the objective requirements of process production optimization,the metallurgical process is faced with the practical demands in improvement of accuracy,resolution,rapidity,continuity,on-line performance and systematicness.Laser-induced breakdown spectroscopy(LIBS)is an innovative atomic emission spectrometry analysis technology based on laser,and it has a wide application prospect and devel-opment potential in the metallurgical field because of its unique advantages such as no need for complex sample pretreatment,real-time online analysis,remote detection and non-contact measurement.The tradi-tional quantitative analysis methods,such as standard curve method,internal standard method and free cali-bration method,are usually affected by the sample uniformity,matrix effect and self-absorption effect in ac-curacy,which cannot meet the high-precision quantitative analysis of practical complex application scenari-os.Chemometrics can extract characteristic information from multi-dimensional spectral signals of complex systems to the greatest extent,and it is used to establish some accurate quantitative analysis methods suit-able for complex systems in metallurgical field.Therefore,the research progress of quantitative analysis of ores and alloys by LIBS combined with chemometrics in recent five years were reviewed.Moreover,the key problems and development trends in this field were summarized.
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