Discrimination of organic solid materials by LIBS using methods of correlation and normalized coordinates

作者：Lasheras R J; Bello Galvez C; Rodriguez Celis E M; Anzano J^*

来源：Journal of Hazardous Materials, 2011, 192(2): 704-713.

DOI：10.1016/j.jhazmat.2011.05.074

• LIBS
• Identification
• Organic solid materials
• Spectral libraries

The methods of linear and rank correlation and normalized coordinates (MNC) have been applied to the identification of organic solid materials with a very similar chemical composition by laser-induced breakdown spectroscopy (LIBS). The present study evaluated these three statistical methods using an Echelle spectrometer coupled with an intensified charge-coupled device (ICCD). Moreover, three instrumental parameters (laser pulse energy, delay time and integration time) were evaluated in terms of their influence on the signal-to-noise ratio of carbon and hydrogen emission lines. The probability of a right identification can be estimated by means the described methods in this paper. Methods of correlation provide better identification and discrimination than normalized coordinates at a 95% confidence level.

• 出版日期2011-8-30