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

Author(s)

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]}

Affiliation

^[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

• Document type: Journal article
• Source: ANALYTICAL METHODS; v. 12, n. 16, p. 2102-2113, APR 28 2020.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 17/20914-8 - Method validation for determination of trace elements in urine for occupational evaluation of foundry workers
• Grantee: Bruna Moreira Freire
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 10/07566-1 - Development of rapid methods for sample preparation and chemical speciation of arsenic in foods by LC-ICP-MS and evaluation of metabolism and concentration in rice
• Grantee: Bruno Lemos Batista
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/05151-0 - Arsenic and rice: monitoring and (bio)remediation studies for food safety
• Grantee: Bruno Lemos Batista
• Support Opportunities: Research Grants - Young Investigators Grants