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 application note presents a method to identify and quantify low concentrations of haloacetic acids, bromate, and dalapon in drinking water according to U.S. EPA Method 557 using a Thermo Scientific™ Dionex™ ICS-6000 ion chromatography system and a Thermo Scientific™ Dionex™ IonPac™ AS31 column coupled with triple quadrupole electrospray mass spectrometry. Replacing the IonPac AS24 column used in the original Method 557 work with the IonPac AS31 saves 20 min per sample.
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.
