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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of bioavailable phosphorus in fish feeds by ultrasound extraction and visible spectrophotometry

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Paula M. de Moraes ; Vanessa R. Loureiro ; Pedro M. Padilha ; Renato de Cássio F. Neves ; Mayra A. D. Saleh ; Felipe A. dos Santos ; Fábio A. Silva
Total Authors: 7
Document type: Journal article
Source: Química Nova; v. 32, n. 4, p. 923-927, 2009.

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. (AU)