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Teor de nitrato em produtos hortícolas e frutos consumidos ao longo do ano em Portugal
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Advisor(s)
Abstract(s)
Os nitratos são comuns na natureza e amplamente encontrados em alimentos,
água e solo, embora sejam os produtos hortícolas a sua principal fonte
de ingestão. Os produtos hortícolas têm uma função nutricional essencial
e desempenham um papel importante na proteção da saúde mas quando
consumidos em excesso, os nitratos podem causar efeitos adversos. No
sentido de poder avaliar a exposição alimentar da população a nitratos é
importante determinar os teores de nitratos nos alimentos na forma como
são consumidos e conhecer como os seus valores podem ser influenciados
pela sazonalidade. Neste estudo, a quantificação do nitrato foi realizada
através de um método HPLC-UV aplicado em 17 amostras diferentes de
produtos hortícolas e frutos obtidas através do estudo piloto no âmbito do
projeto Total Diet Study Exposure (TDS-Exposure). O teor de nitrato nas
amostras variou entre 11 e 2369 mg/kg de produto. Na alface, produto hortícola
que possui teores máximos legislados, a concentração de nitrato em
todas as amostras foi menor que os limites máximos permitidos (2500 a
4500 mg/kg). Relativamente ao efeito da sazonalidade, as variações encontradas
em algumas das amostras não foram na sua maioria significativas.
Nitrates compounds are common in nature and widely found in foods, waters and soils, although vegetables are considered the main source of dietar y nitrate intake. Vegetables have an essential nutritional function and play an impor tant role in health protection, but when consumed in excess, nitrates could cause adverse ef fects. In order to assess the dietar y exposure of the population to nitrates, it is impor tant to determine the levels of nitrates in food in the way they are consumed and to know how their values can be influenced by seasonality. In this study, nitrate quantification was per formed using an HPLC-UV method applied to 17 dif ferent samples of vegetables and fruits obtained through the pilot study under the Total Diet Study Exposure project (TDS-Exposure). The nitrate content in the samples ranged between 11 and 2369 mg/kg of product. In the let tuce, vegetable that has maximum legislated contents, the concentration of nitrate in all the samples was smaller than the maximum permit ted levels (2500 a 4500 mg/kg). Regarding the ef fect of seasonality, the variations found in some of the samples were not mostly significant.
Nitrates compounds are common in nature and widely found in foods, waters and soils, although vegetables are considered the main source of dietar y nitrate intake. Vegetables have an essential nutritional function and play an impor tant role in health protection, but when consumed in excess, nitrates could cause adverse ef fects. In order to assess the dietar y exposure of the population to nitrates, it is impor tant to determine the levels of nitrates in food in the way they are consumed and to know how their values can be influenced by seasonality. In this study, nitrate quantification was per formed using an HPLC-UV method applied to 17 dif ferent samples of vegetables and fruits obtained through the pilot study under the Total Diet Study Exposure project (TDS-Exposure). The nitrate content in the samples ranged between 11 and 2369 mg/kg of product. In the let tuce, vegetable that has maximum legislated contents, the concentration of nitrate in all the samples was smaller than the maximum permit ted levels (2500 a 4500 mg/kg). Regarding the ef fect of seasonality, the variations found in some of the samples were not mostly significant.
Description
Keywords
Segurança Alimentar Teor de Nitrato Produtos Hortícolas Frutos Consumo Portugal Saúde Pública
Pedagogical Context
Citation
Boletim Epidemiológico Observações. 2018 maio-agosto;7(22):21-24
Publisher
Instituto Nacional de Saúde Doutor Ricardo Jorge, IP