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Method A <br /> Peak Ret. Time Ion mg/L <br /> 1 1.17 F- 2 <br /> 2 1.73 CI- 20 <br /> 3 2.02 NO2 2 <br /> 2 4 2.95 Br 2 <br /> 5 3.20 NO3 10 <br /> 6 5.38 HPO4�- 2 <br /> 7 6.92 so4Z- 60 <br /> 7 <br /> 5 <br /> 1 3 <br /> 4 6 <br /> 0 2 4 6 8 <br /> Minutes <br /> Figure 1.Chromatogram showing separation using the AS4A column <br /> Method B <br /> 3 Peak Ret. Time Ion mg/L <br /> 1 2.75 CIO 2- 0.1 <br /> 2 3.23 BrO3 0.1 <br /> 3 3.63 Cl- 0.1 <br /> 4 7.08 CIO 3- 0.1 <br /> 1 2 4 <br /> 0 2 4 6 8 <br /> Minutes <br /> Figure 2.Chromatogram showing separation using the AS9 column <br /> 300.0-13 August 1991 <br />