Selenium determination in tissue samples of Nile tilapia using ultrasound-assisted extraction

• Autorzy: Fábio Silva , Cilene Padilha , Gustavo Castro , Paulo Roldan , Ana Araujo Nogueira , Paula Moraes , Pedro Padilha
• Języki publikacji: EN

Abstrakty

EN

This paper proposes a method to determine selenium in samples of fish muscle and liver tissue using ultrasound assisted extraction process, and analysed by graphite furnace atomic absorption spectrometry (GFAAS). The selenium content was extracted by 0.10 M HCl at the optimal extraction conditions which were established as follows: sample mass of 100 mg; granulometry of the sample <60 µm; sonication time of five 40 s cycles; and sonication power of 136 W. The selenium determinations were performed by GFAAS, at a drying temperature of 120°C/250°C, pyrolysis temperature of 1300°C, atomization temperature of 2300°C, and cleaning temperature of 2800°C. Palladium nitrate was used as a chemical modifier coinjected with the samples, and tungsten as a permanent modifier. The concentration of selenium determined in the pool of fish muscle and liver tissue were 280.4±4.2 e 592.3±6.7 μg kg−1, respectively. The accuracy and precision of the proposed extraction method were evaluated using certified standard Bovine Muscle - NIST 8414. The results obtained by the ultrasonic extraction method were equivalent to those obtained by the method of acid mineralization of samples in a microwave oven

Słowa kluczowe

EN

Selenium extraction; Graphite furnace atomic absorption spectrometry; Essentiality of Selenium; Fish nutrition; Nile tilapia

• Czasopismo: Open Chemistry
• Rocznik: 2011
• Tom: 9
• Numer: 1
• Strony: 119-125

Daty

wydano

2011-02-01

online

2010-12-16

Twórcy

autor

Fábio Silva

• FMVZ/UNESP — Postgraduate Program in Zootechny, C. Postal 31, 15385-000, Botucatu, SP, Brazil

autor

Cilene Padilha

• IB/UNESP — Department of Physical and Biophysical, C. Postal 510, 18618-970, Botucatu, SP, Brazil

autor

Gustavo Castro

• FEIS/UNESP — Department of Physical and Chemistry, C. Postal 31, 15385-000, Ilha Solteira, SP, Brazil

autor

Paulo Roldan

• UFAL — Institute of Chemistry and Technology, 57072-970, Maceió, Al, Brazil

autor

Ana Araujo Nogueira

• GAIA-EMBRAPA PECUÁRIA SUDESTE, C. Postal 339, 13560-970, São Carlos, SP, Brazil

autor

Paula Moraes

• IB/UNESP — Department of Chemistry and Biochemistry, C. Postal 510, 18618-970, Botucatu, SP, Brazil

autor

Pedro Padilha,

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Identyfikatory

DOI

10.2478/s11532-010-0121-0