Abstract
Four biological treatment plants for municipal sewage, situated at different locations, were examined for their chlorophenol content and their ability to degrade these compounds. A routine method for the analysis of both low- and high-chlorinated phenols was developed, based on gas chromatography with electron-capture detection (GC-ECD). The method was evaluated by comparing the GC-ECD results with those obtained by combined gas chromatography-mass spectrometry with selected-ion monitoring of the molecular ions of the specific phenols. The total phenol content, determined by GC-ECD showed a good correlation with the phenol number, obtained by using the 4-aminoantipyrine method.
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