Comments on AOAC dry ash method for digestion of mineral-mix feeds

Phosphorus in feeds or mineral mixes containing monobasic calcium phosphate cannot be determined accurately if the sample is subjected to the dry ash procedure described in AOAC method 7.125-7.128. HCl-insoluble calcium metaphosphates are formed at the high temperature required for ashing.

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Bibliographic Details
Published inJournal of the Association of Official Analytical Chemists Vol. 71; no. 4; p. 854
Main Authors Latimer, Jr, G W, Ilger, W, Hinojosa, H, Roth, M
Format Journal Article
LanguageEnglish
Published United States 01.07.1988
Subjects
Animal Feed - analysis
Calcium Phosphates - analysis
Indicators and Reagents
Minerals - analysis
X-Ray Diffraction
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Summary:Phosphorus in feeds or mineral mixes containing monobasic calcium phosphate cannot be determined accurately if the sample is subjected to the dry ash procedure described in AOAC method 7.125-7.128. HCl-insoluble calcium metaphosphates are formed at the high temperature required for ashing.
ISSN:0004-5756
DOI:10.1093/jaoac/71.4.854