A novel spectrofluorimetric method for the ultra trace analysis of nitrite and nitrate in aqueous medium and its application to air, water, soil and forensic samples.

A highly sensitive and virtually specific method has been developed for the trace and ultra trace 5ngml(-1)-1mugml(-1) fluorimetric analysis of nitrite. The method is based on the quenching action of nitrite on the native fluorescence of murexide (ammonium purpurate) [lambda(ex)=349.0nm, lambda(em)=444.