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Master thesis . 2025
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Avaliação do teor de sal e de elementos minerais em alimentos processados

Authors: Silveira, Beatriz Monteiro da;

Avaliação do teor de sal e de elementos minerais em alimentos processados

Abstract

O consumo excessivo de sal é um tema que vem ganhando um considerável interesse a nível mundial, devido às suas implicações para a saúde. A ingestão de sal acima do nível recomendado pela Organização Mundial da Saúde (5 g/dia), levou à implementação de diversas medidas para reduzir os níveis de sódio nos alimentos, e a nível nacional o Governo aprovou a Estratégia Integrada para a Promoção da Alimentação Saudável (EIPAS). O objetivo do presente trabalho foi determinar o teor de sódio em diferentes tipos de alimentos processados, recolhidos em alguns pontos de comercialização do mercado nacional. As amostras analisadas foram: batatas fritas e snacks salgados, tostas, sopas, cubos de caldo e produtos de charcutaria, designadamente salsichas, fiambres, presuntos e alimentos pré-cozinhados para dietas vegetarianas e vegan. A técnica analítica utilizada foi ICP-AES (Inductively Coupled Plasma – Atomic Emission Spectroscopy), após a digestão ácida. Em relação aos resultados, o teor de sal encontrado na maioria das amostras foi semelhante aos declarados nos rótulos. O maior teor de sal foi observado nas amostras cubos de caldo, e o menor teor de sal foi observado numa amostra de tosta, e salienta-se que nos fiambres e salsichas analisados, uma determinada marca se destaca pelos teores de sal inferiores. A maioria das amostras apresentaram alto nível de sal de acordo com a classificação da Food Standards Agency, e estavam acima do valor de referência estabelecido pela EIPAS – de 0,3 g/100 g. Este estudo ressalta a importância e a urgência da continuidade dos programas de monitoramento de sal nos alimentos no país, além da necessidade de implementar novas políticas e regulamentações públicas. É necessário que haja um esforço conjunto na implementação dessas ações, visando alcançar os níveis de sal recomendados pela OMS.

Excessive salt consumption is a topic that has gained considerable interest around the world, due to its implications for health. Salt intake above the recommendation level (5 g/day) by the World Health Organization (WHO) led to the implementation of several measures to reduce sodium levels in foods, and at the national level the Government approved the Integrated Strategy for the Promotion of Healthy Eating (EIPAS). The objective of the present work was to determine the sodium content of different types of processed foods, collected at some points of sale in the national market. The samples analyzed were: chips and snacks, toast, soups, bouillon cubes and cold cuts, notably sausages, hams, boiled hams and pre-cooked foods for vegetarian and vegan diets were also analyzed. The analytical technique used was ICP-AES (Inductively Coupled Plasma – Atomic Emission Spectroscopy), after acid digestion. Regarding the results, the salt content found in most samples was similar to that declared on the labels. The highest salt content was observed in the bouillon cube samples, the lowest salt content was observed in a sample of toast and it should be noted that in the boiled hams and sausages analyzed, a certain brand presented the lowest salt content. Most samples had a high level of salt according to the Food Standards Agency classification, and was above the reference value established by EIPAS – 0,3 g/100 g. This study highlights the importance and urgency of continuing food salt monitoring programs in the country, in addition to the need to implement new public policies and regulations. There must be a joint effort to implement these actions, aiming to reach the salt levels recommended by the WHO.

Mestrado em Engenharia Alimentar / Instituto Superior de Agronomia, Universidade de Lisboa

N/A

Country
Portugal
Keywords

sal, ICP-AES, macronutrients, processed foods, OMS, micronutrientes, salt, alimentos processados

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green