Multivariate quality control studies applied to Ca(II) and Mg(II) determination by a portable method

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Autor(es): dc.contributorUniversidad de Valencia-
Autor(es): dc.contributorMat. y Servicios S.L.-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorMarzo, J. B.-
Autor(es): dc.creatorMedina-Hernández, M. J.-
Autor(es): dc.creatorSagrado, S.-
Autor(es): dc.creatorBonet, E.-
Autor(es): dc.creatorGimenes, R.-
Data de aceite: dc.date.accessioned2025-08-21T16:10:09Z-
Data de disponibilização: dc.date.available2025-08-21T16:10:09Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued1998-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/(SICI)1099-128X(199809/10)12:5<323-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/223807-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/223807-
Descrição: dc.descriptionA portable or field test method for simultaneous spectrophotometric determination of calcium and magnesium in water using multivariate partial least squares (PLS) calibration methods is proposed. The method is based on the reaction between the analytes and methylthymol blue at pH 11. The spectral information was used as the X-block and the Ca(II) and Mg(II) concentrations obtained by a reference technique (ICP-AES) were used as the Y-block. Two series of analyses were performed, with a month's difference between them. The first series was used as the calibration set and the second one as the validation set. Multivariate statistical process control (MSPC) techniques based on statistics from principal component models, were used to study the features and evolution with time of the spectral signals. Signal standardization was used to correct the deviations between series Method validation was performed by comparing the predictions of the PLS model with the reference Ca(II) and Mg(II) concentrations determined by ICP-AES using the joint interval test for the slope and intercept of the regression line with errors in both axes. © 1998 John Wiley & Sons, Ltd.-
Descrição: dc.descriptionDepto. de Quim. Analítica Facultad de Farmacia Universidad de Valencia, C/Vicente Andres Estelles, E-46100 Burjassot, Valencia-
Descrição: dc.descriptionGen. Analisis Mat. y Servicios S.L., Valencia-
Descrição: dc.descriptionDepto. Quim. Tecnologica Aplicacao Instituto de Quimica Universidade Estadual Paulista, Rua Francisco Degni, Araraquara, SP-
Descrição: dc.descriptionDepto. Quim. Tecnologica Aplicacao Instituto de Quimica Universidade Estadual Paulista, Rua Francisco Degni, Araraquara, SP-
Formato: dc.format323-336-
Idioma: dc.languageen-
Relação: dc.relationJournal of Chemometrics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAnalysis of water-
Palavras-chave: dc.subjectCalcium and magnesium multicomponent analysis-
Palavras-chave: dc.subjectMultivariate statistical process control (MSPC)-
Palavras-chave: dc.subjectPartial least squares (PLS) regression-
Palavras-chave: dc.subjectSignal standardization-
Título: dc.titleMultivariate quality control studies applied to Ca(II) and Mg(II) determination by a portable method-
Tipo de arquivo: dc.typelivro digital-
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