A green and efficient procedure for the preconcentration and determination of cadmium, nickel and zinc from freshwater, hemodialysis solutions and tuna fish samples by cloud point extraction and flame atomic absorption spectrometry

Autor(es)

Galbeiro, Rafaela ; Garcia, Samara ; Gaubeur, Ivanise

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF TRACE ELEMENTS IN MEDICINE AND BIOLOGY; v. 28, n. 2, p. 6-pg., 2014-01-01.

Resumo

Cloud point extraction (CPE) was used to simultaneously preconcentrate trace-level cadmium, nickel and zinc for determination by flame atomic absorption spectrometry (FAAS). 1-(2-Pyridilazo)-2-naphthol (PAN) was used as a complexing agent, and the metal complexes were extracted from the aqueous phase by the surfactant Triton X-114 ((1,1,3,3-tetramethylbutyl)phenyl-polyethylene glycol). Under optimized complexation and extraction conditions, the limits of detection were 0.37 mu g L-1 (Cd), 2.6 mu g L-1 (Ni) and 2.3 mu g L-1 (Zn). This extraction was quantitative with a preconcentration factor of 30 and enrichment factor estimated to be 42, 40 and 43, respectively. The method was applied to different complex samples, and the accuracy was evaluated by analyzing a water standard reference material (NIST SRM 1643e), yielding results in agreement with the certified values. (C) 2013 Elsevier GmbH. All rights reserved. (AU)

• Processo FAPESP: 11/19730-3 - Emprego da extração em ponto nuvem (CPE) e da microextração líquido-líquido dispersiva (DLLME) no desenvolvimento de métodos analíticos para a pré-concentração e determinação espectrométrica de metais
• Beneficiário: Ivanise Gaubeur
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/02798-4 - Pré-concentração dos íons cádmio, níquel e zinco usando extração em ponto nuvem e determinação por espectrometria de absorção atômica
• Beneficiário: Rafaela Galbeiro
• Modalidade de apoio: Bolsas no Brasil - Mestrado