Sushi commercialized in Brazil: Organic Hg levels and exposure intake evaluation

Autor(es)

de Paiva, Esther Lima ^[1] ; Alves, Jeanne Clecia ^[2] ; Milani, Raquel Fernanda ^[1] ; Boer, Barbara Sia ^[1] ; Quintaes, Kesia Diego ^[2] ; Morgano, Marcelo Antonio ^[1]

Afiliação do(s) autor(es)

^[1] Inst Food Technol ITAL, POB 139, BR-13070178 Campinas, SP - Brazil

^[2] Fed Univ Ouro Preto UPOP, Sch Nutr, BR-35400000 Ouro Preto, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FOOD CONTROL; v. 69, p. 115-123, NOV 2016.
• Citações Web of Science: 7

Resumo

The presence of organic mercury (methylmercury) in tuna, salmon and kani sushis marketed in restaurants specialising in Japanese foods (Campinas, Sao Paulo, Brazil), was investigated by atomic absorption spectrometer with thermal decomposition and amalgamation. Total mercury was analyzed directly, whilst organic mercury was quantified after a previous extraction with toluene in an acid solution, assisted by microwaves. Under these analytical conditions there was no interconversion between the inorganic and organic mercury. High sensitivity was observed for organic mercury, with limits of detection and quantification of 2.0 and 6.6 mu g kg(-1). The organic mercury contents ranged from 12 to 583 mu g kg(-1), 6.6 to 8.2 mu g kg(-1) and no detected values, for the tuna, kani and salmon sushi, respectively. The mean proportion of organic Hg/total Hg for tuna sushi was 88%, indicating that the most toxic form of mercury, organic Hg, predominate in this food. The estimated exposure to methylmercury was made by taking into account the Provisional Tolerable Weekly Intake (PTWI 1.6 mu g/kg) considering the daily consumption of 150 g and 20 g per adults (60 kg) and children (15 kg), respectively. Our results demonstrated that the consumption of tuna sushi may exceed 100% of PTWI. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/50667-9 - Implementação de uma nova metodologia analítica para estudo de mercúrio orgânico e total visando a segurança alimentar
• Beneficiário: Marcelo Antonio Morgano
• Modalidade de apoio: Auxílio à Pesquisa - Regular