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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
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
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
Evaluation of laser induced breakdown spectroscopy for multielemental determination in soils under sewage sludge application. Author(s): FERREIRA, E. C.; MILORI, D. M. B. P.; FERREIRA, E. J.; SANTOS, L. M. dos; MARTIN NETO, L.; NOGUEIRA, A. R. de A. Laser induced breakdown spectroscopy (LIBS) is an atomic emission spectroscopy technique for simple, direct and clean analysis, with great application potential in environmental sustainability studies... ... Repository: BDPA Publication year: 2011
Predicting the nutritional value of tropical forages by Near Infrared Reflectance Spectroscopy (NIRS). Author(s): CAMPOS, R. L. C. de; OLIVEIRA, R. H. M. de; MACEDO, M. C. M.; GOMES, R. da C. Abstract – The aim was to improve multivariate calibration curves for near- infrared refl ectance spectroscopy (NIRS) for the measurement and prediction of nutritive value of tropical forages. Samples... ... Repository: BDPA Publication year: 2024

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