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.
Translated title of the contribution | Determination of bioavailable phosphorus in fish feeds by ultrasound extraction and visible spectrophotometry |
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Original language | Portuguese |
Pages (from-to) | 923-927 |
Number of pages | 5 |
Journal | Quimica Nova |
Volume | 32 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2009 |
Externally published | Yes |
Keywords
- Ultrasound extraction
- Fish nutrition
- Phosphorus absorption