Determinations of N-Nitrosodimethylamine (NDMA) at part-per-trillion (ng/L) concentrations in contaminated groundwaters and drinking waters featuring carbon-based membrane extraction disks
- Oak Ridge National Lab., TN (United States)
- Rocky Mountain Arsenal, Commerce City, CO (United States). Lab. Support Div.
A new solid phase extraction procedure extracts N- Nitrosodimethylamine (NDMA) at part-per-trillion (ng/L) concentrations from aqueous samples using a C{sub 18} (reversed-phase) membrane extraction disk layered over a carbon-based extraction disk. The reversed-phase disk removes nonpolar water-insoluble neutrals and is set aside; the carbon-based disk is extracted with a small volume of dichloromethane. NDMA is quantitated in the organic extract using a gas chromatograph equipped with both a short-path thermal desorber and a chemiluminescent nitrogen detector (CLND). The Method Detection Limit for the procedure is 2 ng of NDMA/L; the analyte recovery is approximately 57%. A related procedure substitutes a standard automatic sampler for the short-path thermal desorber, and is suitable for determining NDMA in heavily-contaminated aqueous samples. The Method Detection Limit for the `high-level` procedure, which employs an automatic sampler, is 180 ng of NDMA/L, with an analyte recovery of approximately 64%.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 261102
- Report Number(s):
- CONF-9607123--2; ON: DE96011941; CNN: Agreement 1989-H077-A1
- Country of Publication:
- United States
- Language:
- English
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