Validated IC-MS/MS Workflow Improves EPA 557 Regulated Drinking Water Analysis The Thermo Scientific HAA9 Disinfection By-Products (HAAs) Application Workflow ensures accurate and reproducible determination of haloacetic acids in drinking water samples Municipal utility laboratories, contract testing laboratories, and local or regional governing agencies performing water testing can now benefit from a new, validated application workflow using ion chromatography tandem mass spectrometry (IC-MS/MS) to achieve haloacetic acid (HAA) analysis in drinking water in accordance with the U.S. Environmental Protection Agency Method 557 (EPA 557). The new Thermo Scientific Disinfection By-Products (HAAs) Application Workflow uses the Thermo Scientific Dionex ICS-6000 HPIC system and a Thermo Scientific Dionex IonPac AS31 column coupled with triple quadrupole mass spectrometry, to deliver a fast, sensitive and simple method, that has been developed for direct analysis of nine HAAs, bromate, and dalapon in drinking water samples. The robust and validated workflow enables method precision and accuracy, following the EPA 557 regulation, which is paramount to testing drinking water safety. To minimize system downtime, trained field service personnel can provide after sales support for the complete IC and MS/MS system as required.