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N-nitrosodimethylamine (NDMA) and other nitrosamines have been reported in drinking andrecycled water at low parts-per-trillion levels, both as contaminants and disinfection byproducts.Many of these nitrosamines cause cancer in animals and are probable humancarcinogens. In this study, three existing analytical methods were expanded, refined, andvalidated for the analysis of NDMA and seven other nitrosamines in potable, waste, andrecycled water. Method detection limits for a solid-phase extraction (SPE) method and acartridge SPE (CSPE) coupled with gas chromatography-tandem mass spectrometry were0.7¿¿¿¿¿¿¿¿0.8 ng/L for NDMA and 0.3¿¿¿¿¿¿¿¿1.4 ng/L for other nitrosamines. The micro-liquid-liquid extraction (MLLE) method that was developed used less volume and was effective at analyzingthe different sample matrixes but yielded higher detection limits (2¿¿¿¿¿¿¿¿4 ng/L). NDMA was the onlynitrosamine detected in potable water; however N-nitrosodiethylamine, N-nitrosomorpholine,N-nitrosopiperidine, N-nitrosodi-n-butylamine, and N-nitrosopyrrolidine were present in othermatrices tested. The SPE methods and the MLLE method have been submitted for inclusionin the next revision of Standard Methods for the Examination of Water and Wastewater, andthe CSPE method will be submitted for approval in the future. Includes 17 references, tables, figures.

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Edition: Vol. 98 - No. 12 Published: 12/01/2006 Number of Pages: 15File Size: 1 file , 470 KB