Stable isotope terminology

In order to achieve better mutual understanding, a uniform and unambiguous language concerning certain terms, symbols, units, and nomenclature in stable isotope – especially in 15N tracer technique has been recommended. In particular, some definitions of fundamental terms, some nomenclature rules for stable isotopically labelled compounds and some symbols and units in the formula language of isotope stoichiometry are given. Recent fundamental recommendations of the IUPAC have been accepted as a basis, to which, if necessary, specialities of stable isotope chemistry, especially 15N application are added or adapted.