Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.

BELTRAME, K. K.; SOUZA, A. M. de; COELHO, M. R.; WINKLER, T. C. B.; SOUZA, W. E.; VALDERRAMA, P.; KARLA K. BELTRAME, UTFPR; ANDRE MARCELO DE SOUZA, CNPS; MAURICIO RIZZATO COELHO, CNPS; THAYANE C. B. WINKLER; WYRLLEN E. SOUZA, UTFPR; PATRÍCIA VALDERRAMA, UTFPR.

Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.

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 objective of this study was to evaluate which of the reference methods could provide a calibration model with higher predictive ability. A total of 161 soil samples obtained from horizons in full profiles (Parque Estadual da Mata Seca, Minas Gerais State, Brazil) were used. Models were mean centered and built from partial least squares. The dichromate oxidation method presented a lower accuracy when compared to dry combustion analysis as reference for NIRS. Figures of merit such as sensitivity, analytical sensitivity, detection and quantification limits, adjust and linearity presented results very similar. A paired t-test was applied to the figures of merit results and with 95% confidence did not show significant differences between the two methods used as reference for NIRS. The non-parametric Mann Whitney test showed that the samples provided with the partial least squares (PLS) model when the reference method was the dichromate oxidation or dry combustion analysis come from the same population, indicating that the reference methods employed for multivariate calibration from NIRS provide the same results practically.

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Bibliographic Details
Main Authors:	BELTRAME, K. K., SOUZA, A. M. de, COELHO, M. R., WINKLER, T. C. B., SOUZA, W. E., VALDERRAMA, P.
Other Authors:	KARLA K. BELTRAME, UTFPR; ANDRE MARCELO DE SOUZA, CNPS; MAURICIO RIZZATO COELHO, CNPS; THAYANE C. B. WINKLER; WYRLLEN E. SOUZA, UTFPR; PATRÍCIA VALDERRAMA, UTFPR.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2018-08-31
Subjects:	Carbono, Análise do Solo, Soil organic carbon, Soil analysis,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094899 http://dx.doi.org/10.5935/0103-5053.20160031
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id	dig-alice-doc-1094899
record_format	koha
spelling	dig-alice-doc-10948992018-09-01T00:47:21Z Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration. BELTRAME, K. K. SOUZA, A. M. de COELHO, M. R. WINKLER, T. C. B. SOUZA, W. E. VALDERRAMA, P. KARLA K. BELTRAME, UTFPR; ANDRE MARCELO DE SOUZA, CNPS; MAURICIO RIZZATO COELHO, CNPS; THAYANE C. B. WINKLER; WYRLLEN E. SOUZA, UTFPR; PATRÍCIA VALDERRAMA, UTFPR. Carbono Análise do Solo Soil organic carbon Soil analysis 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 objective of this study was to evaluate which of the reference methods could provide a calibration model with higher predictive ability. A total of 161 soil samples obtained from horizons in full profiles (Parque Estadual da Mata Seca, Minas Gerais State, Brazil) were used. Models were mean centered and built from partial least squares. The dichromate oxidation method presented a lower accuracy when compared to dry combustion analysis as reference for NIRS. Figures of merit such as sensitivity, analytical sensitivity, detection and quantification limits, adjust and linearity presented results very similar. A paired t-test was applied to the figures of merit results and with 95% confidence did not show significant differences between the two methods used as reference for NIRS. The non-parametric Mann Whitney test showed that the samples provided with the partial least squares (PLS) model when the reference method was the dichromate oxidation or dry combustion analysis come from the same population, indicating that the reference methods employed for multivariate calibration from NIRS provide the same results practically. 2018-09-01T00:47:14Z 2018-09-01T00:47:14Z 2018-08-31 2016 2018-09-01T00:47:14Z Artigo de periódico Journal of the Brazilian Chemical Society, v. 27, n. 9, p. 1527-1532, 2016. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094899 http://dx.doi.org/10.5935/0103-5053.20160031 en eng openAccess
institution	EMBRAPA
collection	DSpace
country	Brasil
countrycode	BR
component	Bibliográfico
access	En linea
databasecode	dig-alice
tag	biblioteca
region	America del Sur
libraryname	Sistema de bibliotecas de EMBRAPA
language	English eng
topic	Carbono Análise do Solo Soil organic carbon Soil analysis Carbono Análise do Solo Soil organic carbon Soil analysis
spellingShingle	Carbono Análise do Solo Soil organic carbon Soil analysis Carbono Análise do Solo Soil organic carbon Soil analysis BELTRAME, K. K. SOUZA, A. M. de COELHO, M. R. WINKLER, T. C. B. SOUZA, W. E. VALDERRAMA, P. Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.
description	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 objective of this study was to evaluate which of the reference methods could provide a calibration model with higher predictive ability. A total of 161 soil samples obtained from horizons in full profiles (Parque Estadual da Mata Seca, Minas Gerais State, Brazil) were used. Models were mean centered and built from partial least squares. The dichromate oxidation method presented a lower accuracy when compared to dry combustion analysis as reference for NIRS. Figures of merit such as sensitivity, analytical sensitivity, detection and quantification limits, adjust and linearity presented results very similar. A paired t-test was applied to the figures of merit results and with 95% confidence did not show significant differences between the two methods used as reference for NIRS. The non-parametric Mann Whitney test showed that the samples provided with the partial least squares (PLS) model when the reference method was the dichromate oxidation or dry combustion analysis come from the same population, indicating that the reference methods employed for multivariate calibration from NIRS provide the same results practically.
author2	KARLA K. BELTRAME, UTFPR; ANDRE MARCELO DE SOUZA, CNPS; MAURICIO RIZZATO COELHO, CNPS; THAYANE C. B. WINKLER; WYRLLEN E. SOUZA, UTFPR; PATRÍCIA VALDERRAMA, UTFPR.
author_facet	KARLA K. BELTRAME, UTFPR; ANDRE MARCELO DE SOUZA, CNPS; MAURICIO RIZZATO COELHO, CNPS; THAYANE C. B. WINKLER; WYRLLEN E. SOUZA, UTFPR; PATRÍCIA VALDERRAMA, UTFPR. BELTRAME, K. K. SOUZA, A. M. de COELHO, M. R. WINKLER, T. C. B. SOUZA, W. E. VALDERRAMA, P.
format	Artigo de periódico
topic_facet	Carbono Análise do Solo Soil organic carbon Soil analysis
author	BELTRAME, K. K. SOUZA, A. M. de COELHO, M. R. WINKLER, T. C. B. SOUZA, W. E. VALDERRAMA, P.
author_sort	BELTRAME, K. K.
title	Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.
title_short	Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.
title_full	Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.
title_fullStr	Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.
title_full_unstemmed	Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.
title_sort	soil organic carbon determination using nirs: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.
publishDate	2018-08-31
url	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094899 http://dx.doi.org/10.5935/0103-5053.20160031
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_version_	1756025009014308864

Soil organic carbon determination using NIRS: evaluation of dichromate oxidation and dry combustion analysis as reference methods in multivariate calibration.

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