Elemental chemical composition and As speciation in rice varieties selected for biofortification

Autor(es)

Freire, Bruna Moreira ^[1] ; Santos, Vivian da Silva ^[2] ; Ferreira Neves, Pericles de Carvalho ^[3] ; Oliveira Souza Reis, Juliana Maria ^{[1, 4]} ; de Souza, Samuel Simiao ^{[1, 4]} ; Barbosa Jr, Fernando ; Batista, Bruno Lemos ^{[1, 5, 6]}

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil

^[2] Univ Brasilia, Fac Ceilandia, Campus Univ Ctr Metropolitano, Brasilia, DF - Brazil

^[3] EMBRAPA Arroz & Feyao, Empresa Brasileira Pesquisa Agr, Km 12 Zona Rural GO 462, Santo Antonio De Goias, Go - Brazil

^[4] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Av Cafe Vila Monte Alegre, Ribeirao Preto, SP - Brazil

^[5] Batista, Bruno Lemos, Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Av Cafe Vila Monte Alegre, Ribeirao Preto, SP, Brazil.Freire, Bruna Moreira, Barbosa Jr, Jr., Fernando, Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil

^[6] Barbosa Jr, Jr., Fernando, Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Av Cafe Vila Monte Alegre, Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANALYTICAL METHODS; v. 12, n. 16, p. 2102-2113, APR 28 2020.
• Citações Web of Science: 0

Resumo

Toxic elements, essential elements and other elements were determined in Brazilian rice by inductively coupled plasma-mass spectrometry (ICP-MS). The levels of As and Cd ranged from 34.4 to 86.5 ng g(-1)and from 3.8 to 8.4 ng g(-1), respectively. For Fe and Zn, the concentrations varied from 41.0 to 138.6 mu g g(-1)and from 18.0 to 38.4 mu g g(-1), respectively. A method for As speciation using hydride generation was developed. The developed method showed the lowest detection limits: 0.004 mu g L(-1)for dimethyl arsenic acid (DMA), 0.003 mu g L(-1)for monomethylarsonic acid (MMA) and arsenite (As3+) and 0.010 mu g L(-1)for arsenate (As5+). It also showed higher sensitivity compared with the literature. The mean percentages of species in the ten rice varieties were 16% (As5+), 65% (As3+), 24% (DMA) and 12% (MMA). Strong positive correlation coefficients (higher than 0.700, andp< 0.05) were found for As and Cd with other elements. The analyzed varieties presented higher levels of Fe, Zn and Co as well as low levels of As and Cd when compared with other studies, so they may be a basic source for genetic improvement. The mean estimated daily intakes through rice consumption were 3.88 mu g for As, 0.43 mu g for Cd, 5967 mu g for Fe, 92 039 mu g for Mg, 2124 mu g for Mn, 1875 mu g for Zn, 2.88 mu g for inorganic As and 0.92 mu g for DMA. Our findings demonstrated that the consumption of rice varieties assessed by this study may effectively increase the daily consumption of Fe and decrease the daily intake of As among the Brazilian population. (AU)

• Processo FAPESP: 17/20914-8 - Validação de método para determinação de elementos traço em urina para avaliação ocupacional de trabalhadores de fundição
• Beneficiário: Bruna Moreira Freire
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 10/07566-1 - Desenvolvimento de métodos rápidos de preparo de amostras para especiação química de arsênio em alimentos por LC-ICP-MS e avaliação das concentrações e do metabolismo em arroz
• Beneficiário: Bruno Lemos Batista
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• 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