solutions containing 13 mm [ 14c ] ndma , 15 mm feso4 , 15 mm h2o2 , and 7.5 mm h2so4 were kept at 4-10 degrees c for 1 h and then basified to yield methylamine ( 3.2 +/- 0.5 mm , mean +/- sd , n = 8 ) , formaldehyde ( 3.1 +/- 0.9 mm ) , and unreacted nitrosamine ( 10.2 +/- 0.7 mm ) as the only radioactive species detected , with total nitrate/nitrite also being found at a level of 2.8 +/- 0.5 mm .
C0012431
ndma
C0028197
nitrosamine