DETERMINATION OF AROMATIC-AMINES AS THEIR N-DIMETHYLTHIOPHOSPHORYL DERIVATIVES BY GAS-CHROMATOGRAPHY WITH FLAME PHOTOMETRIC DETECTION

A selective and sensitive method was developed for the determination o f aromatic amines by gas chromatography (GC). Aromatic amines were con verted into their N-dimethylthiophosphoryl derivatives and measured by GC with flame photometric detection using two-connected fused-silica capillary column containing DB-1 and DB-17, respectively. The derivati ves were sufficiently volatile and stable to give single symmetrical p eaks. The calibration graphs for aromatic amines in the range 25-2000 ng were linear and the detection limits at a signal-to-noise ratio of 3 were ca. 30-100 pg injected. This method was successfully applied to smoke samples without prior clean-up. Overall recoveries of aromatic amines added to cigarette smoke samples were 90-108%. Analytical resul ts for the contents of aromatic amines in combustion smokes of various samples are presented.