Arsenic speciation in Brazilian rice grains organically and traditionally cultivated: Is there any difference in arsenic content?

Autor(es)

Segura, Fabiana Roberta ; de Oliveira Souza, Juliana Maria ; De Paula, Eloisa Silva ; Martins, Airton da Cunha, Jr. ; Cavalheiro Paulelli, Ana Carolina ; Barbosa, Fernando, Jr. ; Batista, Bruno Lemos

• Tipo de documento: Artigo Científico
• Fonte: Food Research International; v. 89, p. 8-pg., 2016-11-01.

Resumo

Inorganic arsenic contamination in rice is a global public concern due to the risks associated. In spite of being an important issue, few studies concerning differences between inorganic arsenic in rice grains under organic and conventional methods of cultivation are available in Brazil, which is an important producer and consumer. In the present work, samples of polished and husked rice (organic and conventional) and gastronomic rice (Arborio, Carnaroli and red/black rice) were analyzed and the results compared to FAO/Codex maximum limits. The total determination and speciation analysis of arsenic were carried out by ICP-MS and HPLC-ICP-MS, respectively. The results showed no significant statistical differences in total As concentration in organic rice (157.7 +/- 56.1 ng g(-1)) vs. conventional rice (137.4 +/- 46.6 ng g(-1)) and also in organic husked rice (227.7 +/- 95.5 ng g(-1)) vs. conventional husked (217.7 +/- 60.9 ng g(-1)). However, inorganic As was 45% higher in organic polished rice than in conventional polished rice and 41% higher in organic husked rice than in conventional husked rice. Gastronomic rice presented total arsenic ranging from 65.4 to 348 ng g(-1) for black and Arborio rice, respectively. Regarding the maximum levels adopted by Codex for i-As (200 ng g(-1)), no violation was found. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/05151-0 - Arsênio e arroz: monitoramento e estudos de (bio)remediação para segurança alimentar
• Beneficiário: Bruno Lemos Batista
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 15/06674-9 - Arsênio e arroz: monitoramento e estudos de (bio)remediação para segurança alimentar
• Beneficiário: Fabiana Roberta Segura
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto