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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Zinc determination in samples fish by GFAAS using acid digestion in an ultrasound bath

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Autor(es):
de Lima, Paula Monteiro [1] ; Cavecci, Bruna [2] ; Roldan, Paulo dos Santos [3] ; Braga, Camila Pereira [2] ; Federici Padilha, Cilene do Carmo [2] ; Pezzato, Luiz Edivaldo [1] ; Padilha, Pedro de Magalhaes [1, 2]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ, Coll Vet & Anim Sci, Botucatu, SP - Brazil
[2] Sao Paulo State Univ UNESP, Biosci Inst, Dept Chem & Biochem, BR-18618970 Botucatu, SP - Brazil
[3] Univ Fed Alagoas, Inst Chem & Biotechnol, Maceio, Alagoas - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION; v. 10, n. 1, p. 113-118, MAR 2016.
Citações Web of Science: 1
Resumo

The aim of this paper was to determine the zinc concentrations in muscle samples of Nile tilapia (Oreochromis niloticus) produced in aquaculture and fed diets containing inorganic and organic zinc sources. In the sample preparation step, the samples were lyophilized and ground cryogenically to produce particles smaller than 60 mu m. The zinc extraction was conducted by acid mineralization using concentrated nitric acid and hydrogen peroxide in a thermostatically controlled ultrasonic batch reactor. The zinc determinations were performed by Graphite Furnace Atomic Absorption Spectrometry at a drying temperature of 90-250 degrees C, pyrolysis temperature of 1400 degrees C, atomization temperature of 2400 degrees C, and cleaning temperature of 2800 degrees C. Niobium nitrate was used as a chemical modifier co-injected with the samples, and tungsten was employed as a permanent modifier. Among the muscle tissue samples of Nile tilapia that were analyzed, zinc concentrations were determined in the range of 3.70-19.00 mg kg(-1) (LOD 0.012 mu g L-1 and LOQ 0.041 mu g L-1). The accuracy and precision of the proposed method of zinc determination was validated using the DORM-certified standard Fish Protein 4 NRC. (AU)

Processo FAPESP: 10/51332-5 - Desenvolvimento de métodos analíticos para estudo metalômico do mercúrio em peixes coletados na área de influência do AHE Jirau Bacia do Rio Madeira
Beneficiário:Pedro de Magalhães Padilha
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 10/51562-0 - Estudo metaloproteomico em amostras de tecido muscular de tilapia do nilo alimentadas como fontes de zinco organico e inorganico
Beneficiário:Paula Monteiro de Lima
Linha de fomento: Bolsas no Brasil - Doutorado