Sustainable Approach to Haloacetic Acid Analyses by LCMSMSNew Organic Monitoring Techniques
Oral Presentation
Prepared by J. Mitchell
PACE ANALYTICAL, 12065 LEBANON ROAD, Mt. Juliet, TN, 37122, United States
Contact Information: [email protected]; 615-944-9517
ABSTRACT
Haloacetic acids (HAAs) are a group of disinfection byproducts formed when chlorine reacts with organic materials in water. Exposure to these byproducts in public drinking water is regulated by the USEPA in the Safe Drinking Water Act (SDWA) under the Disinfectants and Disinfection Byproducts rules using method EPA 552.2. This method requires an extraction and derivatization process utilizing a methyl-t-butyl ether (MTBE) extraction followed by methylation using a 10 % sulfuric acid in methanol solution.
This discussion will present a sustainable process for analysis of materials of concern that results in a significantly reduced environmental impact associated with the preparation and analysis of drinking water samples for regulatory reporting. A direct aqueous injection of the matrix for analysis using an Agilent 6475 LCMSMS will be presented with accompany validation data and a comparison of performance of the LCMSMS/DIADIA process against the currently approved extraction, derivatization, and gas chromatography method will be discussed.
