Evaluation of univariate and multivariate calibration strategies for the direct determination of total carbon in soils by laser-induced breakdown spectroscopy: tutorial

• DOI: 10.1364/josab.482644
• Publication Date: 2023-04-12T14:00:10Z
• Authors: Wesley Nascimento...; Diego Victor Babos; Vinícius Câmara C...; Carla Pereira De ...; Vitor da Silveira...; Kleydson Stenio; Alfredo Augusto P...; Luís Carlos Leva ...; Paulino Ribeiro V...; Débora Marcondes ...
• Keywords: Univariate; Laser-induced breakdown spectroscopy; Matrix (chemical analysis)

The correct choice of the calibration strategy method is a step that can ensure accuracy carbon determination in soils by laser-induced breakdown spectroscopy. In this paper, we evaluate and discuss intrinsic characteristics univariate multivariate strategies overcoming soil matrix effects their influence on magnitude prediction error values. matrix-matching with previous correction Al spectral interference C I line at 193.03 nm was best 13 models evaluated [root-mean-square calibration—(RMSEP)=0.2wt.%C]. evaluation 22 obtained, artificial neural network allowed obtaining lower value for (RMSEP=0.1wt.%C) very good (98%) set samples validation. observation these results justified considering advantages limitations each explored.