Classification of Ceramic Tableware by Laser Induced Breakdown Spectroscopy and Chemometrics

Abstract

Ceramics manufactured in Brazil and in other countries were analyzed by laser induced breakdown spectroscopy (LIBS). The LIBS spectra were employed to identify the origin of the tableware as produced in Brazil or abroad using soft independent modeling of class analogy (SIMCA) and linear discriminant analysis (LDA). Three sets of spectral variables were evaluated aiming at discrimination of the ceramics: the entire LIBS spectrum, a set of selected spectral ranges, and the maximum of emission intensity of the elements Al, Ca, Mg, Si, Na and Ti. The results for the three sets of variables show good performance, achieving correct classification from 88.6 to 94.3%, and 86.7 to 100% for the external training and test, respectively.

Keywords:

• Ceramic tableware classification
• laser induced breakdown spectroscopy (LIBS)
• chemometrics
• linear discriminant analysis (LDA)
• soft independent modeling of class analogy (SIMCA)

Disclosure statement

There are no conflicts of interest to declare.

Additional information

Funding

The authors are grateful to the Instituto Nacional de Ciências e Tecnologias Analíticas Avançadas (INCTAA) processes FAPESP # 2008/57808-1 and CNPq # 573894/2008-6 and to the Agência Nacional de Vigilância Sanitária (ANVISA) through the MCTI/CNPq/ANVISA 23/2012, process # 403403/2012-0, for financial support. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) -Finance Code 001 and Fundação de Amparo a Pesquisa do Estado do Rio Grande do Sul (FAPERGS) for scholarship support.