Data/hora: 19/06/2024 01:04:41

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 03/12/2020
Data da última atualização: | 03/12/2020
Autoria: | MOREIRA, L. S.; SÁ, I. P.; MACHADO, R. C.; NOGUEIRA, A. R. de A.; SILVA, E. G. P. da; AMARAL, C. D. B.
Afiliação: | Luana S. Moreira, UFPR; Ívero P. Sá, UFSCAR; Raquel Cardoso Machado, UFSCAR; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; Erik G. P. da Silva, UNIVERSIDADE DO ESTADO SANTA CRUZ; Clarice D. B. Amaral, UFPR.
Título: | Coprecipitation magnesium(II) hydroxide as a strategy of pre-concentration for trace elemental determination by microwave-induced plasma optical emission spectrometry.
Ano de publicação: | 2020
Fonte/Imprenta: | Spectrochimica Acta Part B, v. 169, 105899, jul. 2020.
DOI: | https://doi.org/10.1016/j.sab.2020.105899
Idioma: | Inglês
Conteúdo: | 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 ?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.
Palavras-Chave: | Fish samples; Mg(OH)2; MIP OES; Multivariate optimization; Nitrogen plasma; Sample preparation.
Categoria do assunto: | W Química e Física
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (25182-1) - UPC - AP - DD - PROCI-2020.00096 - MOR - 2020.00147 - DIS