Determination of aromatic amines in ground- and wastewater by two new derivatization methods.
Two derivatization methods for arom. amines are presented that are based on the halogenation of the arom. ring. Bromination yields brominated anilines, in which all hydrogens in ortho- and para-positions are replaced by Br via an electrophilic substitution. In contrast, iodination yields the corresponding iodobenzenes, in which all amino groups are substituted by I. Sepn. of at least 30 derivs. in a single GC run in 30 min is possible with each method. Detection in routine anal. was done with an electron capture detector, but some findings with GC-MS and GC with at. emission detection are also presented. Both methods were applied to real samples of different origin and the results are compared. In industrial wastewater and groundwater from a landfill and a former ammunition plant, about 20 arom. amines were found to be present in the mg/L concn. range. In the case of the former ammunition plant, most analytes obsd. were degrdn. products of nitroarom. explosives. In both other cases aniline and Me anilines were the main pollutants found.
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