Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.18/5055
Título: Application of chemometric methods for multi‐elemental characterization of fruit juices and nectars analysed in the Portuguese Total Diet Studies pilot study
Autor: Coelho, Inês
Rego, Andreia
Gueifão, Sandra
Nascimento, Ana Cláudia
Castanheira, Isabel
Palavras-chave: Arsenic Speciation
Mineral and Trace Elements
Pattern Recognition Methods
Pooling Effect
Segurança Alimentar
Data: Fev-2017
Editora: John Wiley and Sons
Citação: J Chemom. 2017;31:e2868. doi:10.1002/cem.2868
Resumo: Multivariate analysis was applied to test the adequacy of pooling samples versus single units as a sampling strategy to estimate dietary intake and risk assessment of chemical elements in nonalcoholic beverages. The contents of 18 minerals and trace elements (Cr, Mn, Cu, Zn, As, Se, Mo, Sr, Co, Cd, Sn, Pb Fe, Mg, Ca, P, Na, and K) in fruit juices and nectars were determined by inductively coupled plasma–optical emission spectrometry and inductively coupled plasma–mass spectrometry. Arsenic speciation was done with high‐performance liquid chromatographer‐inductively coupled plasma–mass spectrometry. The data obtained in pooledsamples and single units were then studied by analysis of variance and least significant difference tests, Spearman's correlation, principal component analysis, and cluster analysis. Analysis of variance and least significant difference tests were used to evaluate analytical data from pooled samples and single units. Values of individual units and pooled samples were statistically different with the exception of Se (P < .05), illustrating pooling as an inadequate strategy. Spearman's correlation displayed significant correlations between the following pairs: P‐K (0.924), Mo‐K (0.888), Mo‐P (0.876), and Ca‐Mg (0.846), indicating that chemical elements could be from the same source, having a natural occurrence, or the same exposure sources. By applying principal component analysis and cluster analysis, it was possible to classify juices and nectars by fruit type and geographical origin. It was observed that 2 principal components accounted for 59% of the total variance in the data. Cluster analysis classified samples into 5 clusters. Combined chemometric tools are suited to select appropriate laboratory sampling strategies for risk assessment. Application of chemometric methods to analytical data may be useful to group samples by similar characteristics for the purpose of Total Diet Studies.
Peer review: yes
URI: http://hdl.handle.net/10400.18/5055
DOI: 10.1002/cem.2868
ISSN: 0886-9383
Versão do Editor: http://onlinelibrary.wiley.com/doi/10.1002/cem.2868/abstract
Aparece nas colecções:DAN - Artigos em revistas internacionais



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