Minerals and trace elements contents in fruit juice: a contribution for Portuguese total diet studies

Coelho, Mariana; Nascimento, Ana; Gueifão, Sandra; Sardinha, D.; Castanheira, Isabel

http://hdl.handle.net/10400.18/2535

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Abstract(s)

Total diet studies complement traditional monitoring and surveillance by providing a scientific basis for population dietary exposure to contaminants, with potential impact on public health. This should be achieved by using quality assurance procedures and specifically by applying analytical methods where performance criteria have been established in compliance with metrological requirements. The aim of this study is to determine the amounts of minerals and trace elements in 24 types of fruit juices, obtained from various kinds of fruits, available in the Portuguese market and representative of consumption by Portuguese population. Inductively coupled plasma optical emission spectrometry (ICP-OES) technique was employed for determination of the elements Sodium, Potassium, Calcium, Phosphorus, Magnesium, Manganese, Iron, Copper, Zinc, and ICP-MS for the trace elements, Chromium, Nickel, Molybdenum, Strontium, Tin, Cobalt, Selenium, Arsenium, Cadmium and Lead. In orange juice high Potassium and Phosphorus content were observed. High concentration of Sodium 6,9 % was determined in apple juice and Arsenic was found below limit of quantification for majority of samples under analysis. All the results have been achieved in agreement with rigorous metrological procedures as previous defined. This information will be used for dietary exposure assessment which combines food consumption data with data on the concentration of chemicals in food. The resulting dietary exposure estimate may then be compared with the relevant health based guidance value for the food chemical of concern, if available, as part of the risk characterization. Metrological procedures reveal a crucial tool to guarantee fiability of measurement results used in risk assessment associated with the consumption of fruit juice.

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Abstract publicado: Zappa, G. and Zoani, C. (editors) 1st IMEKOFOODS: metrology promoting objective and measurable food quality & safety, Rome, October 12-15, 2014. Roma: ENEA: 118 (P30). Disponível em: http://imekofoods.enea.it/sites/default/files/docs/Abstract_Book_1st-IMEKOFOODS_.pdf