Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2893
Título: Survey of trace elements (Al, As, Cd, Cr, Co, Hg, Mn, Ni, Pb, Se, and Si) in retail samples of flavoured and bottled waters
Autor: Barroso, M. Fátima
Ramos, Sandra
Oliva-Teles, Maria Teresa
Delerue-Matos, Cristina
Sales, M. Goreti F.
Oliveira, M. Beatriz P. P.
Palavras-chave: Health significance
Metals analysis – atomic absorption spectrometry (AAS)
Method validation
Statistical analysis
Heavy metals – arsenic
Heavy metals – cadmium
Heavy metals – mercury
Metals – nutritional
Drinking water
Data: 2009
Editora: Taylor & Francis
Relatório da Série N.º: Food Additives & Contaminants: Part B ; Vol. 2; Issue 2
Resumo: Concentrations of eleven trace elements (Al, As, Cd, Cr, Co, Hg, Mn, Ni, Pb, Se, and Si) were measured in 39 (natural and flavoured) water samples. Determinations were performed using graphite furnace electrothermetry for almost all elements (Al, As, Cd, Cr, Co, Mn, Ni, Pb, and Si). For Se determination hydride generation was used, and cold vapour generation for Hg. These techniques were coupled to atomic absorption spectrophotometry. The trace element content of still or sparkling natural waters changed from brand to brand. Significant differences between natural still and natural sparkling waters (p<0.001) were only apparent for Mn. The Mann–Whitney U-test was used to search for significant differences between flavoured and natural waters. The concentration of each element was compared with the presence of flavours, preservatives, acidifying agents, fruit juice and/or sweeteners, according to the labelled composition. It was shown that flavoured waters generally increase the trace element content. The addition of preservatives and acidifying regulators had a significant influence on Mn, Co, As and Si contents (p<0.05). Fruit juice can also be correlated to the increase of Co and As. Sweeteners did not provide any significant difference in Mn, Co, Se and Si content.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2893
ISSN: 1939–3210
Versão do Editor: http://www.tandfonline.com/doi/abs/10.1080/02652030903081945#.UouCMX9qyZQ
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