Determinação de fósforo biodisponível em rações de peixes utilizando extração assistida por ultra-som e espectrofotometria no visível
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Undergraduate course
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Sociedade Brasileira de Química
FapUNIFESP (SciELO)
FapUNIFESP (SciELO)
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Acesso aberto
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Abstract
The aim of the present work was to develop and optimize a method for determination of bioavailable phosphorus in samples of feces and fish feed using ultrasound extraction and subsequent quantification by visible spectrophotometry. Using as extractor solution HNO3 0.50 mol L-1, the great conditions of extraction established were: sample mass - 100 mg, samples granulometry - < 60 µm, sonification time - five cycles of 40 s and ultrasound potency - 136 W. The proposed method was applied in studies of digestibility of this nutrient in different feeds used in diets of juvenile of Nile tilapia.
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Portuguese
Citation
Química Nova. São Paulo, SP, Brazil: Sociedade Brasileira de Química, v. 32, n. 4, p. 923-927, 2009.
