Evaluation of the content of minerals and toxic metals and dietary fiber in plant products and their extracts
Ficheiros
Data
2012
Autores
Título da revista
ISSN da revista
Título do Volume
Editora
IPCB. ESA
Resumo
The objectives of this work were (i) to learn about methods used in quantification of
mineral elements such as the Zn, Cu, K, Na, Pb and Cd in food samples, as well as the
methodology used in the quantification of the fiber, (ii) know the principal laboratory
procedures of the chemical analysis of food and (iii) interpret the results obtained relating them
with possible effects on human health. Thus, in the first part of the work presents an approach
to fundament and applications of atomic absorption spectrophotometry for the quantification of
mineral elements and methodology for the valuation of crude fiber in foods. They are also
referred to the main effects of mineral nutrients and fiber in human health. Was verified that
the method of atomic absorption presents a good precision of results regarding the concentration
of minerals in food samples. However, the levels of lead and cadmium in some samples exhibit a
low accuracy, there was a necessity to assess the origin of this variability. The samples
Demonstrate contents of mineral elements K, Na, Cu, Zn, Pb and Cd, which Conducted to
ingestion within the intervals considered adequate for human health. Relatively to partition
between the husk and endosperm of the mineral elements in seed samples was observed that the
potassium accumulates in the endosperm, whereas the other elements analyzed minerals (Na,
Cu, Zn, Pb and Cb) accumulate mainly in the husk. Also, the fiber shows a similar behavior
concentrating mainly on grain husk of Fagopyrum esculentum (buckwheat or buckwheat) having
high levels of fiber. It was observed that the Cu content of the cocoa has relatively high values
and may result in a daily intake which exceeds the values considered suitable for human health.
Descrição
Disponível na Biblioteca da ESACB na cota C30-27355TFCNHQA.
Palavras-chave
Cocoa , Fagopyrum esculentum , Fiber , Food quality , Mineral elements
Citação
GONÇALVES, Nélia Neves (2012) - Evaluation of the content of minerals and toxic metals and dietary fiber in plant products and their extracts. Castelo Branco : IPCB. ESA. 1 CD-ROM. Relatório do Trabalho de Fim de Curso de Nutrição Humana e Qualidade Alimentar.