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.
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.
The use of ASE in the extraction of chlorinated herbicides from solid wastes is more convenient, faster, and less solvent-intensive than previous methods.U.S. In the method reported in this application note, chlorinated herbicide recoveries by ASE are equivalent to recoveries from the wrist-shaking method recommended in Method 8150A. The procedures described in this application note meet the requirements for sample extraction as prescribed by U.S. EPA Method 3545.
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.
