Separation of Anionic Compounds by

    Strong Anion2exchange Capillary Electrochromatography

    Lei Zhengdeng , Ye Mingliang , Zou Hanfa

    3

    , Wu Ren′ an , Ni Jianyi

    ( National Chromatographic Research &Analysis Center , Dalian Institute of Chemical Physics ,Chinese Academy of Sciences , Dalian 116011 )

    Abstract The separation of anionic compounds by strong anion 2exchange capillary electrochromatography (SAX2

    CEC) was carried out . It was found that the analytes could be absorbed onto the stationary phase , and this would

    lessen the retention factors ( k

    3) of the analytes , thus the column separation capability decreased. For the acidic

    compounds , k

    3

    increased with increase of applied voltage. And the change of the applied voltage could provide ......