Analysis of trace inorganic anions in weak acid salts by single pump cycling-column-switching ion chromatography

摘要: The application of ion chromatography with the single pump cycling-column-switching technique was described for analysis trace inorganic anions in weak acid salts within a run. Due to hydrogen ions provided by an anion suppressor electrolyzing water, could be transformed into acids, existing as molecules, after passing through suppressor. Therefore, and ion-exclusion column were adopted achieve on-line matrix elimination high concentration salts. A series standard solutions consisting target various concentrations from 0.005 10 mg/L analyzed, correlation coefficients r ≥ 0.9990. limits detection range 0.67 1.51 μg/L, based on signal-to-noise ratio 3 25 μL injection volume. Relative deviations retention time, peak area, height all less than 2.01%. spiking study performed satisfactory recoveries between 90.3 104.4% anions. chromatographic system successfully applied five