ABSTRACT
The development of ion chromatography (IC) in the 1960s [8] and 1970s opened the door for more specific and sensitive trace level analyses for a wide variety of anionic species, including perchlorates [9]. In 1993, the U.S. EPA published Method 300.0 [10] for ion chromatography analysis of water samples with conductivity detection for common anions and disinfection byproducts, and although perchlorate was not included in the analyte list, laboratories applied the technique with some modifications when requested to analyze environmental samples of perchlorate. These method modifications were not standardized across laboratories, and detection limits varied between approximately 400 jLtg/L and low mg/L levels.
