METHOD OF DETERMINING CALCIUM IN FODDER ADDITIVES Russian patent published in 2016 - IPC A23K20/24 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural production, in particular, to fodder production, and can be used in feed mill industry for quantitative and qualitative determination of calcium in domestic and foreign fodder products both for animal breeding and poultry farming. Method of determining calcium in fodder additives with high content of calcium includes sampling, preparation of samples and reagents, conducting tests and calculations of calcium content. To determine calcium a sample is prepared by direct dissolution of the sample in concentrated hydrochloric acid. Herewith for titration Trilon B (disodium dihydrogen ethylenediaminetetraacetate) is used with the concentration of 0.1 mol, and the weight ratio of calcium in the analyzed sample is calculated by a certain formula. Final result is considered to be the arithmetic mean of two parallel determinations, herewith the result is calculated to the second decimal place and rounded to the first one. Chromogen black, chromium dark blue acid or eriochrome blue-black are used as indicators.

EFFECT: proposed method is easy to use and provides accelerated determination of calcium in different fodder additives.

1 cl, 3 tbl