A New Light Into the Characterization of Organic Matter.Drinking Water
Oral Presentation
Prepared by R. Marfil-Vega
Shimadzu, 7102 Riverwood Drive, Columbia, MD, 21046, United States
Contact Information: [email protected]; 410-910-0884
ABSTRACT
The measurement of Total Organic Carbon (TOC) in source and finished water as an indicator of organic matter is routinely done at drinking water utilities to comply with TOC removal requirements under the Stage 1 and 2 Disinfectants and Disinfection Byproducts (DBPs) Rules. Water systems with a surface or ground water under the direct influence of surface water source (Subpart H systems) that operate a conventional filtration treatment plant must comply with this TOC removal requirement with the specific frequency (routine or specific) approved for each system. However, TOC does not provide any insights on the type of organic matter present in the samples or its potential to generate specific DBPs during disinfection. In this presentation, we will share examples of how the use of size exclusion chromatography in combination with TOC detection (offline and online) or other detectors traditionally used in tandem with this technique (ex. refractive index, fluorescence, PDA or UV-VIS) provides quantitative insights for thorough characterization of organic matter present in drinking water.
