AWWA QTC98219

AWWA QTC98219 Identification of New Disinfection By-products Using GC/MS, LC/MS, and GC/IR
Conference Proceeding by American Water Works Association, 01/01/1998

Richardson, Susan D.; Thruston, Alfred D. Jr.; Caughran, Tashia V. ; Chen, Paul H.; Guo, Yingbo; Collette, Timothy W.; Crumley, F. Gene ; Floyd, Terrance L.; Schenck, Kathleen M.; Lykins, Benjamin W. Jr.

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Disinfection Byproduct (DBP) studies typically target a few expected chemicals in drinking water. Due to advanced instrumentation, more comprehensive DBP studies can be carried out, and new DBPs that are not present in mass spectral library databases can be identified. This paper reports the successful identification of many DBPs from alternative disinfectants and from chlorine, many of which have not been previously reported. Experimental procedures were performed on: ozone, ozone/chlorine, and ozone/chloramine samples; chlorine dioxide and chlorine dioxide/chlorine samples; and, derivatizations. The following analyses were also performed: low and high resolution gas chromatography-electron ionization mass spectrometry (GC/EI-MS) analyses were performed on a VG 70-SEQ high-resolution hybrid mass spectrometer, equipped with a Hewlett Packard model 5890A gas chromatograph and a DB-5 column; chemical ionization mass spectrometry (CI-MS) experiments were carried out on a Finnigan TSQ 7000 triple quadrupole mass spectrometer using methane or 2% ammonia in methane gas; and, liquid chromatography/mass spectrometry (LC/MS) experiments were carried out on a Fisons Platform mass spectrometer in the negative ion mode. Results and conclusions are discussed.