Qutitative Analysis For Metallic Elements In Tobacco Based On LIBS Technique

Laser Induced Breakdown Spectroscopy (LIBS) can be used as a tool formeasuring the spectra and rapidly analyzing the concentrations of element. It has hugepotential in many fields, such as environmental contamination detecting, industrialengineering testing, bioresearch, security inspection, space exploration, artworkinspection, etc. Recently, LIBS has been developed rapidly with the development ofthe laser technology and spectrum detection technology, LIBS has been a hot topic inrelated research fields because of its advantages and widely applied fields.During the last several decades, the utilization of tobacco products has been oneof the most significant causes of morbidity and mortality around the world. And theinfluences of the tobacco producets on human health have become more and moreserious. It has been a killer for the human health. The quantitative analysis of the toxicconstituents contained in tobacco products is necessary for the hazard evaluation ofthe tobacco products to the human health. The toxic metallic elements contained inthe tobacco have been analyzed by LIBS, and the error limit has also been measured.In the present work, we have described the experimental system and theperformance of each instruments employed in this work. Also, we have described thecalculational methods of the plasma parameters and the concentrations of eachelement contained in the measured samples. We try to prove whether theDebye-Hückel theory can account for the line shifts or not. The result shows that theDebye potential is only one of the several mechanisms in plasma. The concentrationsof trace metallic element (Fe, Ca, Al, Cu, K, Li, Mg, Mn, Na, Sr, Ti and Zn) have beeninvestigated using the calibration-free laser-induced breakdown spectroscopytechnique. Moreover, variation of metallic elements mass concentration betweentobacco and tobacco ash has been observed.