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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.)

Coprecipitation magnesium(II) hydroxide as a strategy of pre-concentration for trace elemental determination by microwave-induced plasma optical emission spectrometry

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Author(s):
Moreira, Luana S. [1] ; Sa, Ivero P. [2, 3] ; Machado, Raquel C. [2] ; Nogueira, Ana Rita A. [2, 3] ; da Silva, Erik G. P. [4] ; Amaral, Clarice D. B. [1]
Total Authors: 6
Affiliation:
[1] Univ Fed Parana, Dept Chem, BR-81531980 Curitiba, PR - Brazil
[2] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
[3] Embrapa Pecuaria Sudeste, BR-13560970 Sao Carlos, SP - Brazil
[4] Univ Estadual Santa Cruz, Dept Exact & Technol Sci, BR-45662900 Ilheus, BA - Brazil
Total Affiliations: 4
Document type: Journal article
Source: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY; v. 169, JUL 2020.
Web of Science Citations: 0
Abstract

In this work, a method employing coprecipitation procedure with magnesium hydroxide as a carrier for separation/preconcentration of arsenic(V), cadmium(II), chromium(III), cobalt(II), copper(II), manganese(VII), mercury(II), nickel(II), and vanadium(V) was developed. The method was applied in fish and shellfish samples, and the elements were determined by microwave-induced plasma optical emission spectrometry (MIP OES). Complete two-level factorial design for four variables and a mixture design were employed to evaluate and optimize the factors involved in this system. Under optimized conditions, the accuracy of the procedure was assessed using certified reference material, obtaining recoveries of 92 to 105% for the elements studied. The proposed method presented the detection limits in the range of 0.01-0.33 mu g g(-1), and enrichment factors of 5; 17; 6; 25; 24; 25; 25; 25; and 13 for the analytes As5+, Cd2+, Cr3+, Co2+, Cu2+, Mn7+, Hg2+, Ni2+, and V5+, respectively. The applied chemometric tools were effective to optimize the important variables involved in the developed coprecipitation route. The proposed method presented simplicity, low cost, high sensitivity, allowing the determination of the analytes by MIP OES. (AU)

FAPESP's process: 18/26145-9 - Bioavailability, bioaccessibility, and speciation of nutrients and inorganic contaminants in meat and fish
Grantee:Ana Rita de Araujo Nogueira
Support Opportunities: Regular Research Grants