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Comments on AOAC dry ash method for digestion of mineral-mix feeds
G W Latimer1, W Ilger, H Hinojosa
1Office of the Texas State Chemist, Agricultural Analytical Services, College Station 77841.
Journal - Association of Official Analytical Chemists
|July 1, 1988
Abstract:
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.