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<p>Mercury (Hg) is a toxic element that bioaccumulates in aquatic organisms, posing health risks through seafood consumption. This study quantified total Hg in canned tuna in oil purchased from supermarkets in the Metropolitan District of Quito, Ecuador. Three commercial brands were analyzed according to market price (A &lt; B &lt; C) using a direct mercury analyzer. Mean Hg concentrations were 0.22 ± 0.10 mg/kg, 0.63 ± 0.10 mg/kg, and 0.36 ± 0.15 mg/kg for brands A, B, and C, respectively. All values complied with international safety limits; however, the non-carcinogenic risk (HQ &gt; 1) associated with methylmercury exposure from brand C exceeded the reference threshold established by the U.S. Environmental Protection Agency. Recommended weekly intake of tuna to avoid health risks was estimated at 106 g (children) and 512 g (adults) for A; 26 g and 126 g for B; and 64 g and 307 g for C, respectively.</p>

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Total mercury exposure through canned tuna in oil sold in Quito Ecuador

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月12日

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  • Esteban Trujillo-Cruz,
  • Lenys Fernández,
  • Natalia Carpintero-Salvador,
  • Melany Ruiz-Urigüen,
  • Edison Omar Martínez-Mora,
  • Diego Bolaños-Méndez,
  • Patricio Espinoza-Montero

摘要

Mercury (Hg) is a toxic element that bioaccumulates in aquatic organisms, posing health risks through seafood consumption. This study quantified total Hg in canned tuna in oil purchased from supermarkets in the Metropolitan District of Quito, Ecuador. Three commercial brands were analyzed according to market price (A < B < C) using a direct mercury analyzer. Mean Hg concentrations were 0.22 ± 0.10 mg/kg, 0.63 ± 0.10 mg/kg, and 0.36 ± 0.15 mg/kg for brands A, B, and C, respectively. All values complied with international safety limits; however, the non-carcinogenic risk (HQ > 1) associated with methylmercury exposure from brand C exceeded the reference threshold established by the U.S. Environmental Protection Agency. Recommended weekly intake of tuna to avoid health risks was estimated at 106 g (children) and 512 g (adults) for A; 26 g and 126 g for B; and 64 g and 307 g for C, respectively.