N-nitrosodimethylamine (NDMA) formation by the reaction of dimethylamine
(DMA) with nitrite was studied in the absence and in the presence of HOCl at pH 7. The
presence of HOCl significantly enhanced NDMA formation by nitrite. In the absence of
HOCl, the concentration of NDMA formed by DMA with nitrite was increased from 0.34
ug/L to 0.65 ug/L as the nitrite concentration increased from 0.05 mM to 1.0 mM.
However, in the presence of HOCl, the formation of NDMA was significantly enhanced
from 0.14 ug/L to 15.47 ug/L as the nitrite concentration increased from 0.01 mM to 1.0
mM. Additional studies in mixtures of 15N and 14N labeled nitrite and
ammonia indicated that the source of nitrogen in the nitroso group of NDMA may come
from both ammonia and nitrite but their contribution to NDMA formation is governed by
two different mechanisms. Includes 5 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 260 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 6 |
| Published : | 06/15/2003 |
