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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Use of neutron activation analysis and LC-ICP-MS in the development of candidate reference materials for As species determination

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Author(s):
Carioni, Vivian M. O. [1, 2] ; Nomura, Cassiana S. [3] ; Yu, Lee L. [4] ; Zeisler, Rolf [4]
Total Authors: 4
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil
[2] Minist Educ Brazil, CAPES Fdn, BR-70040020 Brasilia, DF - Brazil
[3] Univ Sao Paulo, Inst Quim, Sao Paulo - Brazil
[4] Natl Inst Stand & Technol, Div Chem Sci, Gaithersburg, MD 20899 - USA
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY; v. 299, n. 1, p. 241-248, JAN 2014.
Web of Science Citations: 4
Abstract

Arsenic (As) is widely found in marine organisms, mainly as organic arsenical compounds. With the introduction of regulations for As species in foodstuffs and for environmental control, it has become more important to quantify the amount of arsenic species present. To address this concern new reference materials (RMs) for validation and quality assurance of As speciation measurements are being developed, including a tuna fish tissue and a robalo liver tissue. Instrumental neutron activation analysis (INAA) is used in this work as a proven analytical tool for As determinations and for validating the As mass fraction determined by liquid chromatography coupled to inductively coupled mass spectrometry (LC-ICP-MS) in extracts of the candidate RMs and other fish samples including certified RMs. Various methods for the extraction of water-soluble As species were evaluated. The best results were acquired after methanol/acetone/water extraction yielding in 93 % extractable As in the tuna RM. This procedure was used for the LC-ICP-MS studies. The results demonstrate that INAA can account for 100 % of the distribution of As species in analytical processes. It complements LC-ICP-MS for the validation of the characterization of As species in the development of RMs for such species. Excellent agreement of measured results in certified RMs with the reported values confirms the validity of the applied procedures. (AU)