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A NEW TAILOR-MADE DERIVATIZING AGENT FOR IDENTIFYING POLAR CARBONYL DBPS IN DRINKING WATER
Citation:
Richardson, S D. AND U. Karst. A NEW TAILOR-MADE DERIVATIZING AGENT FOR IDENTIFYING POLAR CARBONYL DBPS IN DRINKING WATER. Presented at 221st American Chemical Society National Meeting, San Diego, CA, April 1-5, 2001.
Impact/Purpose:
(1) Use toxicity-based approach to identify DBPs that show the greatest toxic response. (2) Comprehensively identify DBPs formed by different disinfectant regimes for the 'Four Lab Study'. (3) Determine the mechanisms of formation for potentially hazardous bromonitromethane DBPs.
Description:
Although chlorine has been used to disinfect drinking water for approximately 100 years, there have been concerns raised over its use, due to the formation of potentially hazardous by-products. Ozone is a popular alternative to chlorine, however, there is still much not known about the disinfection by-products (DBPs) formed by ozone, particularly with regard to polar DBPs that may not be extracted and identified using conventional methods. We have recently utilized a new, tailor-made derivatizing agent designed and developed by Karst and coworkers to identify highly polar DBPs in ozonated drinking water. This reagent, 4-dimethylamino-6-(4-methoxy-1-naphthyl)-1,3,5-triazine-2-hydrazine (DMNTH), allows polar carbonyl DBPs to be detected by liquid chromatography (LC)/atmospheric pressure chemical ionization (APCI)-mass spectrometry at part-per-trillion levels, with no preconcentration.