title: Determination and confirmation of N-nitrosodimethylamine in beer.
abstract: A qualitative method has been developed for the confirmation of N-nitrosodimethylamine (NDMA) in beer by capillary gas chromatography-mass spectrometry (GC/MS) from full mass scans after quantitation, using a gas chromatograph interfaced to a thermal energy analyzer (GC/TEA). The GC/MS method has a lower limit of confirmation of 5 ppb. In a survey of 22 imported and 42 domestic beers, NDMA was found in 60 samples by GC/TEA at levels up to 7.7 ppb, and was confirmed by GC/MS in 5 samples.
mesh_terms: D001515:Beer / Q000032:analysis*; D004128:Dimethylnitrosamine / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods
chemical_list: D004128:Dimethylnitrosamine