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Evaluation of digestion procedures in Kjeldahl method to quantify total nitrogen in analyses applied to animal nutrition Animal Sciences
Silva, Tadeu Eder da; Detmann, Edenio; Franco, Marcia de Oliveira; Palma, Malber Nathan Nobre; Rocha, Gabriel Cipriano.
The effects of the salt-to-metal catalyst ratio and amount of digestion mixture on total nitrogen content in different materials using the Kjeldahl method were evaluated. Four samples with low nitrogen contents and four samples with high nitrogen contents were analyzed. The study evaluated two ratios of salt (sodium sulfate) to metal catalyst (copper sulfate) in the digestion mixture (10:1 and 20:1) and three amounts of digestion mixture per sample (1.0, 1.5, and 2.0 g 200 mg-1). There was an interaction between low-nitrogen material and amount of digestion mixture on nitrogen contents. Samples of cattle feces and corn presented higher nitrogen content when 1.5 and 2.0 g of digestion mixture were used. The high-nitrogen materials presented higher nitrogen...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zootecnia; Análise de Alimentos crude protein; Digestion mixture; Feed analysis.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/29171
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