Trace elements in hay powder

In order to improve the state of health and growth of domestic animals, their diet must be well balanced, therefore basic feed often needs to be enriched with respect to trace and minor elements. Such additions are made on the basis of results of analysis of the raw material, e.g. hay. A hay powder reference material has been considered necessary as being complementary to the rye grass material described in section 6.3. The EC Directive 79/373/EEC prescribes the determination of the nutrients Ca, P and Mg S and N are also important elements since they are used as indicators of the availability of proteins finally the administration of iodine to growing animals requires that this element be carefully monitored. Consequently, the hay powder CRM 129 was certified for its contents of Ca, K, Mg, P, S, Zn, I, N and Kjeldahl-N [10,11]. 

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PszoNicKi L, and Hanna AN (1985) Report on Intercomparison lAEA/v-io of the Determination of Trace Elements in Hay Powder. Report IAEA/RL/123, International Atomic Energy Agency, Vienna. 

SUMMARY OF TECHNIQUES OF FINAL DETERMINATION USED IN THE CERTIFICATION OF TRACE ELEMENTS IN HAY POWDER CRM 129... 

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