Abstract
The persistence of TFM in a stream receiving a lampricide treatment was evaluated. Mass balances indicated that a significant amount of TFM was unaccounted for during the treatment. The presence of five known photoproducts in the downstream samples confirmed that photo-degradation of TFM was occurring. A new TFM transformation product 4,4′-dinitro-2,2′-bistrifluoromethylazobenzene, was identified by mass spectrometry and confirmed by synthesis. Most of the impurities in the TFM formulation were less persistent than TFM. However, hydroxynitrobenzoic acid was more persistent than TFM.
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