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Type: Artigo de periódico
Title: Extraction Of Polychlorinated Biphenyls In Breast Milk Samples: Univariated Optimization Versus Experimental Design [extraÇÃo De Bifenilas Policloradas De Amostras De Leite Materno: OtimizaÇÃo Univariada Versus Planejamento Experimental]
Author: Kowalski C.H.
Augusto F.
Godoy H.T.
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 °C) 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.
Rights: aberto
Identifier DOI: 10.1590/S0100-40422013000300018
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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