Determination of chlorobenzidines, in industrial effluent by solid-phase extraction and liquid chromatography with electrochemical and mass spectrometric detection

The analysis of chloroanilines in industrial effluents is severely complica ted by the total organic content (TOC) (10-100 mg/l) and high particle cont ent, which reflects the presence of many compounds other than the analytes of interest. Therefore, both the extraction procedure and the application o f a selective and sensitive detection technique are important. Five differe nt polymeric solid-phase extraction cartridges were tested to extract chlor oanilines and benzidines from Milli-Q and industrial effluent waters. The a nalyses were performed by liquid chromatography with electrochemical detect ion and with atmospheric pressure chemical ionization mass spectrometry in positive ionization mode. These techniques were used to detect several mono - and dichloroanilines in industrial effluents, which had a TOC between 1 a nd 70 mg/l. (C) 1999 Published by Elsevier Science B.V. All rights reserved .