The purpose of this project was to refine, develop, and evaluate multiple methods for Nnitrosodimethylamine
(NDMA) analysis, and where applicable, determine how well these methods are able to
detect other nitrosamines. The methods examined in this study are derivations or refinements of existing
methods and included liquid-liquid extraction (LLE) and solid-phase extraction (SPE). This work was performed
as part a larger project funded by the WateReuse Foundation, entitled "Low Cost Analytical Methods for
Measuring NDMA Concentrations." A goal of this project was to evaluate the capabilities of multiple methods
for a variety of water matrices, including ones that test the durability of the methods and not just the ones that
can achieve the required detection level anticipated for drinking waters (e.g.< 2 ng/L). It was found through the
round-robin testing that the Ambersorb® 572-Envicarb (Amb-Envi) cartridge SPE, Ambersorb® 572 SPE (Amb
SPE), and the traditional LLE methods were all able to report NDMA to a level of approximately 2 ng/L, and
other nitrosamines to a level of between 2 to 4 ng/L across a broad range of sample matrices. The micro-LLE
technique developed in this study, which uses a sample volume of 100 mL, also appears to be effective at
analyzing a broad range of sample matrices, although the reporting level for this method is higher than the other
methods (7 ng/L for NDMA, 5 to 12 ng/L for the other nitrosamines). Additionally, while NDMA was the only
nitrosamine analyzed in detectable concentrations in potable water and tertiary wastewater effluent treated
through reverse osmosis membranes, the two wastewater treatment plant effluent samples (secondary and
tertiary effluent) contained detectable concentrations of nitrosodiethylamine (NDEA), nitrosopyrrolidine
(NPYR), nitrosomorpholine (NMOR), nitrosopiperidine (NPIP), and nitrosodi-n-butylamine (NDBA). Includes 5 references, tables, figures, appendix.
| Edition : | Vol. - No. |
| File Size : | 1
file |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 20 |
| Published : | 11/15/2004 |
