Chinese Journal of Chromatography ›› 2016, Vol. 34 ›› Issue (5): 498-501.DOI: 10.3724/SP.J.1123.2016.01026

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Determination of anion impurities in barium carbonate by ion chromatography with membrane treatment

ZHU Binhe1,2, ZHANG Peimin1, GUO Weiqiang1, LI Gang3, JIANG Xinhua4, WU Shuchao5, ZHU Yan1,2   

  1. 1. Department of Chemistry, Zhejiang University, Hangzhou 310028, China;
    2. Zhejiang Provincial Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals, Zhejiang University, Hangzhou 310028, China;
    3. Shaoxing Environmental Monitoring Station, Shaoxing 312000, China;
    4. Juhua Hospital, Quzhou 324004, China;
    5. Zhejiang Institute of Geology and Mineral Resources, Hangzhou 310007, China
  • Received:2016-01-19 Online:2016-05-08 Published:2012-12-18
  • Supported by:

    National Natural Science Foundation of China (No. 21405141); National Important Project on Science Instrument (No. 2012YQ09022903); Zhejiang Provincial Natural Science Foundation (Nos. LZ16B050001, LY15B050001, S16H180002).

Abstract:

An ion chromatographic (IC) method with membrane treatment was developed for the simultaneous determination of anions (F-, SO42- and NO3-) in barium carbonate. The cation exchange membrane was applied in providing H+ in hydrochloric acid to dissolve barium carbonate and to prevent anions dissolving into the solution from hydrochloric acid. After pre-treatment by acid dissolution and membrane treatment, the sample was diluted for 100 times and filtrated by a 0.22 μ m membrane, then analyzed by IC using 20 mmol/L KOH as the eluent. The target anions were separated by an Ion Pac AG11-HC (50 mm×4 mm) and an Ion Pac AS11-HC (250 mm×4 mm) ion-exchange columns and detected by suppressed conductivity detection with 50 mA current. Under the optimized separation conditions, the calibration curves showed good linearity (R2≥0.9996) in the range of 0.01-5.00 mg/L. The limits of detection were in the range of 1.37-9.45 μ g/L with the relative standard deviations (RSDs) of 1.87%-2.19%. The recoveries of F-, SO42- and NO3- anions were between 84.0% and 106.2%. This method can determine the three inorganic anions (F-, SO42- and NO3-) in barium carbonate fast and accurately. It is suitable for the simultaneous separation and detection of trace inorganic anions in insoluble products.

Key words: anions, barium carbonate, ion chromatography (IC), membrane treatment

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