PRODUCTION OF 15 N-ENRICHED NITRIC ACID (H 15 NO 3 )

Techniques that employ 15 N have proved to be an important tool in many areas of the agronomic and biomedical sciences. Nevertheless, their use is limited by methodological difficulties and by the price of compounds in the international market. Nitric compounds ( 15 NO3 - ) have attracted the interest of researchers. However, these compounds are not currently produced in Brazil. Thus, in the present work H 15 NO3 was - ) of 62.2 %, an overall nitrogen balance (N- 15 NH3 + N- 15 NO3 - ) of 86.8 %, and purity higher than 99 % could be