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Type: Artigo de periódico
Title: Extração de bifenilas policloradas de amostras de leite materno: otimização univariada versus planejamento experimental
Title Alternative: Extraction of polychlorinated biphenyls in breast milk samples: univariated optimization versus experimental design
Author: Kowalski, Cláudia Hoffmann
Augusto, Fabio
Godoy, Helena Teixeira
Abstract: The convenience of the multivariate optimization of SPME procedures through ANOVA calculated using Doehlert designs has been demonstrated for twelve PCBs in the complex matrix of milk. For this study, the main parameters of the extraction were selected and valued through univariate and multivariate optimization. In addition, the analysis of variance allowed identification of the statistically significant variables in this model: high temperature (95 ºC) and ionic strength (36% m/v) proved significant for all the PCBs while intermediate time (70 min) and low methanol concentration (5% v/v) also contributed to the extraction of the majority of these PCBs.
Subject: PCBs
Doehlert design
Editor: Sociedade Brasileira de Química
Citation: Química Nova. Sociedade Brasileira de Química, v. 36, n. 3, p. 468-473, 2013.
Rights: aberto
Identifier DOI: 10.1590/S0100-40422013000300018
Date Issue: 1-Jan-2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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