EPA Method 521

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EPA Method 521:
Determination of Nitrosamines in Drinking Water by Solid Phase Extraction and Capillary Column and Solid Phase Extraction and Capillary Column Gas Chromatography

Summary:
NDMA is an emerging drinking water contaminant that is of interest to EPA and the environmental community. Its presence in drinking water is a potential health concern, because the EPA's IRIS data base lists the concentration of NDMA required to result in a one in one million lifetime cancer risk to be only 0.7 ng/L. NDMA is produced by industrial sources, such as the manufacture of rocket fuel, but has also been identified as a potential disinfection by-product. The focus of NERL's research was to develop an improved analytical method for the analysis of NDMA in drinking water that was sensitive, specific and cost-effective. Existing methods for measuring NDMA in water are expensive and labor intensive, and some require the use of very large amounts of toxic solvents such as methylene chloride. In addition, the sensitivity of some existing methods is insufficient for conducting low-level monitoring. The method was developed for inclusion in EPA's Unregulated Contaminant Monitoring Rule, scheduled for proposal in 2005, in order for the EPA Office of Water to collect nationwide occurrence data on nitrosamines in drinking water and make a regulatory determination. If NDMA or other nitrosamines become regulated drinking water contaminants in the future, the method could also be used for compliance monitoring.

Scope:
This method provides procedures for the determination of nitrosamines in finished drinking water. The method may be applicable to untreated source waters and other types of water samples, but it has not been evaluated for these uses. The method is applicable to nitrosamines that are efficiently partitioned from the water sample onto a solid phase extraction (SPE) sorbent, and sufficiently volatile and thermally stable for gas chromatography.

Citation:
Munch, J. W. METHOD 521: DETERMINATION OF NITROSAMINES IN DRINKING WATER BY SOLID PHASE EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY WITH LARGE VOLUME INJECTION AND CHEMICAL IONIZATION TANDEM MASS SPECTROMETRY (MS/MS). U.S. Environmental Protection Agency, Washington, DC, 2005.

Revision Number:
11/30/2005

Test Description:
Nitrosamines In DW By SPE And Capillary Column GC With LVI And Chemical Ionization Tandem MS (MS/MS)

Report Number:
103912

Date Issued:
05/17/2005

Instrument used for this test:
MS/MS