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Occurrence of N-nitrosodiphenylamine and N-nitrosodimethylamine in 38 Drinking Water Distribution Systems in Canada and the U.S.A.

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Authors
Boyd, J.
Zhao, Y.
Wagner, M.
Qin, F.
Levallois, P.
Legay, C.
Charrois, Jeffrey
Richardson, S.
Hrudey, S.
Li, X.
Date
2010
Type
Conference Paper

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Citation
Boyd, J. and Zhao, Y. and Wagner, M. and Qin, F. and Levallois, P. and Legay, C. and Charrois, J. et al. 2010. Occurrence of N-nitrosodiphenylamine and N-nitrosodimethylamine in 38 Drinking Water Distribution Systems in Canada and the U.S.A., in IWA (ed), IWA World Water Congress and Exhibition, Sep 19 2010. Montreal: IWA.
Source Title
IWA World Water Congress and Exhibition
Source Conference
IWA World Water Congress and Exhibition
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Abstract

This study presents the first investigation into the occurrence of N-nitrosodiphenylamine (NDPhA), a thermally unstable nitrosamine, in drinking water from Canada and the United States. NDPhA, in addition to 8 other nitrosamines, were determined in water samples collected from 38 drinking water distribution systems using high performance liquid chromatography-tandem mass spectrometry (LC/MS/MS). Of the 9 nitrosamines analyzed, NDPhA, NMor and NDMA were detected. Our results show that nitrosamine concentrations change in the distribution system, demonstrating that measurements done solely at the water treatment plant may misestimate the nitrosamine concentrations consumers are exposed to and that NDPhA exposure should be explored. These results are useful for directing future exposure assessments and chloramination treatment.