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Consecutive determination of nitrogen, phosphorus and calcium in animal feeds on a single channel flow injection analyzer with a common analytical manifold

Aufeinanderfolgende Bestimmung von N, P und Ca in Tierfutter in einem einkanaligen Flow-Injection-Analysator mit üblichem Manifold

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Zusammenfassung

Die Probe wird mit K2SO4, HgO und H2SO4 aufgeschlossen und nach Verdünnung direkt in das System eingegeben. Zur Bestimmung dienen die folgenden Reagentien: Phenol/Hypochlorit für N (Protein), Molybdat/ Ascorbinsäure für P und Kresolphthaleinkomplexon/ Aminomethylpropanol für Ca. Im Vergleich mit der Kjeldahl-, der Vanadat-bzw. der AAS-Methode werden gut übereinstimmende Resultate erhalten.

Summary

A procedure is described for the consecutive determination of N, P and Ca in animal feeds by means of a single-channel flow injection analyzer with common manifold. The sample is decomposed with K2SO4, HgO and H2SO4 and is directly injected into the system after dilution. The following reagents are employed: phenol/hypochlorite for N (protein), molybdate/ascorbic acid for P and cresolphthalein complexone/aminomethylpropanol for Ca. Comparison with the results of the Kjeldahl, vanadate and AAS methods, respectively, revealed good agreement.

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Authors and Affiliations

  1. Department of Chemistry, University of Pretoria, Pretoria, South Africa

    W. D. Basson

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  1. W. D. Basson
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Basson, W.D. Consecutive determination of nitrogen, phosphorus and calcium in animal feeds on a single channel flow injection analyzer with a common analytical manifold. Z. Anal. Chem. 311, 23–26 (1982). https://doi.org/10.1007/BF00493495

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  • DOI: https://doi.org/10.1007/BF00493495

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