IDENTIFICATION OF NITROGEN-CONTAINING COM POUNDS OF LOW-MOLECULAR-WEIGHT IN EFFLUENTS OF BIOLOGICALLY TREATED MUNICIPAL WASTE-WATER

Enriching methods based on reversed phases were developed for the inve stigation of low-molecular compounds containing nitrogen in municipal wastewater effluent. The enriched mixtures were treated gas chromatogr aphically without derivatization under different conditions. By applic ation of the PBM-algorithm to the GC/MS spectra of the enriched sample s (concentration factor 1000...20 000), 133 nitrogen-containing compou nds could be identified with a probability of occurence of at least 30 % put out. Seventeen of these compounds were identified with > 90 % p robability and another ten with 80...90% probability. 9-Methylacridine was found in nine of ten processed samples investigated. The nitrogen content of the 133 identified compounds was estimated at about 20 % o f the low-molecular fraction of DON (dissolved organic nitrogen).