Haloacetic acids are formed when chlorine is used to disinfect drinking water. In the Japanese Water Supply Law, it is required to determine contaminant levels of monochloroacetic acid, dichloroacetic acid, and trichloroacetic acid.
In this note, haloacetic acids were analyzed with LC/MS under conditions compliant with the specified test method for water quality standard in Japan. As a result, good linearity and repeatability was obtained.
In addition, clean-up using a Meta SEP LC-Ba/Ag/H SPE cartridge was quite effective when high concentrations of anions, such as sulfate ion, are contained in sample water.