This application note demonstrates the capability and performance of a Thermo Scientific™ Q Exactive™ HF hybrid quadrupole-Orbitrap mass spectrometer-based IC-HRAM MS method to identify and quantify nine haloacetic acids, bromate, and dalapon in drinking water.
This AN evaluated an IC-MS method for the determination of all nine haloacetic acids, bromate, and dalapon in drinking water using a Dionex ICS-6000 HPIC system couple with an ISQ EC single quadrupole mass spectrometer. Dionex IonPac AS31 column was used. It found that the IC-MS method is fast (40 min vs. 60 min in Method 557) and linear. It is sensitive (<1 μg/L), accurate and precise for the determination of U.S. EPA regulated HAA5, bromate, and dalapon. Critical IC system conditions important for successfully running this application are included.
Haloacetic acids (HAA) are disinfection byproducts when water is chlorinated to remove microbial content. The chlorine reacts with naturally occurring organic and inorganic matter in the water, such as decaying vegetation, to produce by-products that include HAAs. Five of the nine HAA species are currently regulated by the EPA as there might be an increased risk of cancer associated with long-term consumption of water containing levels of HAAs that exceed 0.6 mg/L. We describe an IC-MSMS method that provides separation of all nine HAAs addressed in the EPA methods (552.1, 552.2, and 552.3).
Haloacetic acids (HAAs) are formed as disinfection byproducts when water is chlorinated to kill bacteria. Chlorine reacts with naturally occurring organic and inorganic matter in the water, such as decaying vegetation, to produce disinfection by-products (DBPs) that include HAAs. Of the nine species of HAAs, five are currently regulated by the U.S. Environmental Protection Agency (EPA). We demonstrate a simple and sensitive IC-MS/MS method for analyzing haloacetic acids, the pesticide dalapon, and bromate in water using EPA Method 557.
