Inorganic contaminants (As, Cd, Pb) in peeled and whole potatoes and sweet potatoes


  • Alexandra Sixto Universidad de la República, Facultad de Química, Grupo de Análisis de Elementos Traza y Desarrollo de Estrategias Simples para Preparación de Muestras (GATPREM), Montevideo, Uruguay
  • Alicia Mollo Universidad de la República, Facultad de Química, Analytical Chemistry, Montevideo, Uruguay
  • Facundo Ibañez Instituto Nacional de Investigación Agropecuaria (INIA), Estación Experimental Las Brujas, Plataforma de Agroalimentos, Canelones, Uruguay
  • Mariela Pistón Universidad de la República, Facultad de Química, Grupo de Análisis de Elementos Traza y Desarrollo de Estrategias Simples para Preparación de Muestras (GATPREM), Montevideo, Uruguay



inorganic contaminants, potatoes, sweet potatoes, food safety, trace metals


Vegetables are a rich source of macro and micronutrients. Particularly, potatoes and sweet potatoes are widely consumed and are two of the most important food crops in the world. Therefore, contamination of these products due to their content of inorganic contaminants is of great concern.

Considering the healthy trend of consuming these tubers and roots with their skins, which are rich in fiber and other nutrients, analysis of the whole product could provide valuable information in relation to their food safety. Therefore, the presence of arsenic (As), cadmium (Cd) and lead (Pb) in peeled and whole potatoes and sweet potatoes was studied. To do so, analytical methods were optimized and validated according to the Association of Official Analytical Collaboration International (AOAC) requirements for food analysis. Although the content of As, Cd and Pb was in most cases more than three times below the maximum allowed levels for these contaminants, the presence of Cd was detected in the samples of whole sweet potato but not in the peeled ones. The same behavior was observed for Pb in most of the sweet potato samples analyzed. This information points to the need to generate information on the whole root and tuber contaminants content, and to have analytical methods available to gather data on the occurrence of these contaminants in the whole vegetable in order to perform their risk assessment according to the consumption habits.


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How to Cite

Sixto A, Mollo A, Ibañez F, Pistón M. Inorganic contaminants (As, Cd, Pb) in peeled and whole potatoes and sweet potatoes. Agrocienc Urug [Internet]. 2023 Feb. 27 [cited 2024 Jun. 14];27:e1060. Available from:



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