Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.18/4333
Título: Evaluation of total mercury in food available in the portuguese market
Autor: Santiago, Susana
Santos, Mariana
Calhau, M.A.
Palavras-chave: Contaminantes
Segurança Alimentar
Data: Set-2016
Resumo: Heavy metal contamination in food is one of the food safety issues due to the potential human health risks. Mercury, the most volatile heavy metal, occurs widely in the environment from both natural sources and human activities Mercury exposure may cause neurotoxin effects and motor function impairment, harm the cardiovascular system and cause genetic damage. Dietary exposure is the main pathway for mercury intake for the population[1]. The aim of this study was determine the amounts of mercury in 150 different products from 9 food groups available on Portuguese market, representative of consumption by Portuguese population. These samples were collected during 2014 and 2015. Determination was carried in compliance with ISO standard 17025. Total mercury (Hg) was determined in a Direct Mercury Analyser DMA 80, according to United States Environmental Protection Agency test method 7473 (USEPA, 2007)[2]. We obtained a range 0,2 to 13,8 µg/Kg for the limit of quantification. Analytical quality control was achieved using certified reference material NIST 1566b oyster tissue. Most of the results were below the limit of quantification (LOQ). However, 28% of the results revealed measurable mercury. Analysis of this data indicated that the average intake of mercury from fish and seafood products can be near the tolerable weekly intakes established by JECFA (1,6 µg/kg body weight). Although fish is an important part of a healthy diet as it provides important nutrients, it´s recommend that young children select fish from a wide range of species, without giving undue preference to large predatory fish such as swordfish and tuna. Due to their place in the food chain, these fish are likely to contain higher levels of methylmercury than other fish species. These results provide information on the analytical data on the chemical substances of interest and are contribution to food risk assessment.
Peer review: yes
URI: http://hdl.handle.net/10400.18/4333
Aparece nas colecções:DAN - Posters/abstracts em congressos nacionais

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