Artículos de revistas
Acid Decomposition Of Yerba Mate (ilex Paraguariensis) Using A Reflux System For The Evaluation Of Al, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Pb And Zn Contents By Atomic Spectrometric Techniques
Registro en:
Journal Of The Brazilian Chemical Society. Soc Brasileira Quimica, v. 27, p. 685 - 693, 2016.
0103-5053
1678-4790
WOS:000375086300006
10.5935/0103-5053.20150317
Autor
Pereira
Camila C.; Souza
Alexander O.; Oreste
Eliezer Q.; Cidade
Mirla J. A.; Cadore
Solange; Ribeiro
Anderson S.; Vieira
Mariana A.
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) In the first part of this paper, two acid decomposition procedures for the determination of Al, Ca, Fe, Mg, Mn and Zn contents in yerba mate samples by inductively coupled plasma optical emission spectrometry (ICP OES) were compared. Using a reflux system, the samples were treated with a mixture of HNO3 and H2O2 for 3 hours at 220 degrees C in the digester block. The results from five commercial yerba mate samples were compared with the results obtained from microwave digestion. Good agreement between the procedures at a 95% confidence level was obtained with relative standard deviation (RSD) values lower than 10.0%. The accuracy was evaluated using addition and recovery experiments (80.5 to 112.8%). In the second part, Ca, Cd, Cr, Cu, Fe, K, Mg, Na, Pb and Zn concentrations were evaluated in the yerba mate infusion. The results showed that elements such as Na, K, Mg and Zn are easily transferred to the hot water used for the infusion. For Pb and Cd, the concentrations found in the analyzed samples were lower than the values established by Brazilian legislation. 27 4 685 693 Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [552197/2011-4] Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)