Validated Direct Injection Analysis of HAAs in Drinking Water with IC-MS/MS by EPA 557

Drinking Water
Oral Presentation

Prepared by P. Voelker
Thermo Scientific, 490 Lakeside Drive, Sunnyvale, CA, 94085, United States

Contact Information: [email protected]; 408-813-8122


Haloacetic acids (HAAs) are among the disinfection byproducts produced (DBP) during chlorination of water containing natural organic matter and bromide. The two regulated methods used for the analysis of HAAs are GC-ECD per EPA method 552.3 and IC-MS/MS per EPA 557.

Besides differences in technology, the two regulated methods differ in sample preparation. EPA method 552.3 is challenging and time consuming, requiring extraction and derivatization that can take over 4 hours. EPA 557 using IC-MS/MS with direct injection does not require any sample preparation affording higher sample throughput capability.

Results using IC-MS/MS show HAA9, Bromate, and Dalapon can be analyzed in 35 min using Thermo ScientificTM DionexTM IonPacTM AS31 anion exchange column. To demonstrate (IC-MS/MS) system to system variability, results from a repeatability study of multiple systems are presented using HAA9, Bromate, and Dalapon.