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Multivariate analysis of ICP OES calibration conditions for sequential extraction of metals ions. Author(s): NOGUEIRA, A. R. de A.; SOARES, F. S. C.; GROMBONI, C. F.; CARAPELLI, R.; FONTANARI, A. A. Sequential extraction procedures are normally applied to evaluate sediments, soils and plants. Repository: BDPA Publication year: 2009
Evaluation of univariate and multivariate calibration strategies for the direct determination of total carbon in soils by laser-induced breakdown spectroscopy: tutorial. Author(s): GUEDES, W. N.; BABOS, D. V.; COSTA, V. C.; MORAIS, C. P de; FREITAS, V. S.; STENIO, K.; XAVIER, A. A. P.; BORDUCHI, L. C. L.; VILLAS-BOAS, P. R.; MILORI, D. M. B. P. The correct choice of the calibration strategy method is a step that can ensure the accuracy of carbon determination in soils by laser-induced breakdown spectroscopy. In this paper, we evaluate and di... ... Repository: BDPA Publication year: 2023
Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration. Author(s): BELTRAME, K. K.; SOUZA, A. M. de; COELHO, M. R.; WINKLER, T. C. B.; SOUZA, W. E.; VALDERRAMA, P. Dichromate oxidation and dry combustion analysis were evaluated as reference methods to determine organic carbon in Brazilian soils using near infrared spectroscopy (NIRS) as an alternative. The main... ... Repository: BDPA Publication year: 2016
Monitoring vitamin C extraction using multivariate calibration models by NIR. Author(s): SILVA, L. M. H. da; RIBEIRO, L. P. D.; COSTA, B. C.; SILVA, E. de O.; MIRANDA, M. R. A. de Repository: BDPA Publication year: 2021
Analytical validation of a multivariate calibration method for determination of soil organic carbon by near infrared spectroscopy. Author(s): SOUZA, A. M. de; COELHO, M. R.; FONTANA, A.; WINKLER, T. C. B.; JUCÁ, N. M. C.; CASTRO, T. B. de; SHIMIDT, G. B.; VALDERRAMA, P.; POPPIA, R. J. Repository: BDPA Publication year: 2014
Experimento didático de quimiometria para calibração multivariada na determinação de paracetamol em comprimidos comerciais utilizando espectroscopia no infravermelho próximo: um tutorial, parte II. Author(s): SOUZA, A. M. de; BREITKREITZ, M. C.; FILGUEIRAS, P. R.; ROHWEDDER, J. J. R.; POPPI, R. J. The aim of this manuscript was to show the basic concepts and practical application of Partial Least Squares (PLS) as a tutorial, using the Matlab computing environment for beginners, undergraduate an... ... Repository: BDPA Publication year: 2013
Monitoring mineral-associated organic matter in tropical pastures using near infrared spectroscopy. Author(s): SANTANA, F. B. de; SOUZA, A. M. de; BALIEIRO, F. de C.; MIORANZA, M.; RODRIGUES, R. de A. R.; POPPI, R. J. This study proposes an analytical methodology based on near infrared spectroscopy (NIRS) and partial least squares regression (PLSR) as an alternative for the measurement of stabilized and total soil... ... Repository: BDPA Publication year: 2021
Laser-induced breakdown spectroscopy as an analytical tool for total carbon quantification in tropical and subtropical soils: evaluation of calibration algorithms. Author(s): BABOS, D. V.; GUEDES, W. N.; FREITAS, V. S.; SILVA, F. P.; TOZO, M. L. L.; VILLAS-BOAS, P. R.; MARTIN NETO, L.; MILORI, D. M. B. P. The demand for efficient, accurate, and cost-effective methods of measuring soil carbon (C) in agriculture is growing. Traditional approaches are time consuming and expensive, highlighting the need fo... ... Repository: BDPA Publication year: 2024
Predição dos teores de carbono e nitrogênio do solo utilizando espectroscopia de infravermelho próximo. Author(s): MARCHAO, R. L.; BECQUER, T.; BRUNET, D. A espectroscopia de reflectância no infravermelho próximo foi utilizada para prever os teores totais de carbono e nitrogênio do solo. Amostras de solo foram escaneadas em um instrumento monocromador. Repository: BDPA Publication year: 2011
Aplicação de cartas controle para avaliar resultados na verificação de balanças. Author(s): SOUZA, D. R. C. de; MARIN, S. A.; FERRACINI, V. L.; TURUTA, T. B.; OLIVARES, I. B. Resumo: A carta controle é um tipo de gráfico que pode ser utilizado para monitorar e controlar diversos tipos de análises. Na verificação de balanças o objetivo é monitorar, por meio de gráfico, se n... ... Repository: BDPA Publication year: 2014

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