Ultratrace mineral nutrients

The essential mineral nutrients are classified either as principal elements or as trace and ultratrace elements. The distinction between these groups is the relative amounts ia the dietary requirement (see Table 1). 

Trace elements, microelements elements required in very small quantities by living organisms. They act catalytically, or are components of catalytic systems. A elear distinction between T. e. and other mineral nutrients is not always possible, e.g. in the case of iron. A further classification into T. e. and ultratrace elements is sometimes used. 

Anke M, Arnhold W, Muller R and Angelow L (2001a) Nutrients, macro, trace and ultratrace elements in the food chain of mouflons and their mineral status. Second Part Trace Elements. In Nahlik A and Uloth W, eds. Third International Symposium on Mouflon. pp. 243-261, Lover Print, Sopron Hungary. 

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