DETERMINATION OF HYDANTOINS IN CONDENSATE WATER FROM LIGNITE GASIFICATION.

Article abstract of DOI:10.1021/ac00258a030

A method for the characterization of the nonsolvent extractable hydantoins in condensate water from the slagging fixed bed gasification of lignite was developed. The water was treated with activated carbon and the dydantoins were extracted from the carbon with boiling alcohol. A number of 5,5-dialkyl- and 5-alkylhydantoins were separated by gas chromatography on a polar fused silica capillary column and characterized by comparision of their mass spectra with known standards and by matching retention indexes. For compounds with low intensity molecular ions, chemical ionization with methane was used for identification. The 1,3-dimethyl derivatives of the hydantoins were prepared and chromatographed on a nonpolar capillary column to provide further confirmation of the presence of the hydantoins.