Effective procedures for the determination of As, Cd, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Th, Zn, U and rare earth elements in plants and foodstuffs

Author(s)

Paniz, Fernanda Pollo ^[1] ; Pedron, Tatiana ^[1] ; Freire, Bruna Moreira ^[1] ; Torres, Daiane Placido ^[2] ; Silva, Fabio Ferreira ^[1] ; Batista, Bruno Lemos ^[1]

Affiliation

^[1] Fed Univ ABC, Ctr Nat & Human Sci, Bloco A 607-3, BR-09210580 Santo Andre, SP - Brazil

^[2] Brazilian Agr Res Corp, EMBRAPA Clima Temperado Embrapa Temperate Agr, Rodovia BR 392, Km 78, BR-96010971 Pelotas, RS - Brazil

• Document type: Journal article
• Source: ANALYTICAL METHODS; v. 10, n. 33, p. 4094-4103, SEP 7 2018.
• Web of Science Citations: 4

Abstract

There are several international regulations regarding trace elements. The use of ICP-MS for their determination is usually a difficult task, especially when Hg is one of the target elements. This work aimed to provide a fast, simple and low-cost method for routine digestion of different foodstuffs aiming at the determination of As, Cd, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Th, Zn, and U as well as rare earth elements. Four conditions were evaluated for sample heating: a water-bath (WB), a digester block (DB) and a microwave oven (MW) under medium (MWMP) and high-pressure (MWHP). Low-cost homemade PTFE-vessels were used for the WB and DB. The MWHP presented the best recoveries for all elements. The use of the WB and DB allowed the determination of all elements in animal tissues and grains, except Hg. The use of l-CYS 0.2% m/v and a MWHP was crucial for Hg determination. Therefore, this study shows high-frequency methods crucial for industry and labs that focus on food monitoring, especially due to the new regulations in progress worldwide. (AU)

• FAPESP's process: 16/10060-9 - Multi-user equipment (MUE) approved in Grant FAPESP project 2014/05151-0: inductively coupled plasma mass spectrometer hyphenated to an high performance liquid chromatography (HPLC-ICP-MS)
• Grantee: Bruno Lemos Batista
• Support type: Multi-user Equipment Program
• FAPESP's process: 18/06870-0 - Arsenic and rice: monitoring and (bio)remediation studies for food safety
• Grantee: Fernanda Pollo Paniz
• Support type: Scholarships in Brazil - Technical Training Program - Technical Training
• FAPESP's process: 14/05151-0 - Arsenic and rice: monitoring and (bio)remediation studies for food safety
• Grantee: Bruno Lemos Batista
• Support type: Research Grants - Young Investigators Grants
• FAPESP's process: 16/19924-6 - In vitro bioaccessibility assessment and in vivo bioavailability of arsenic ingested through rice commonly consumed by Brazilians
• Grantee: Tatiana Pedron
• Support type: Scholarships in Brazil - Doctorate