Earth Science Frontiers ›› 2010, Vol. 17 ›› Issue (4): 262-269.

• Article • Previous Articles     Next Articles

Chromatographic separation of Cu and Zn from environmental samples for determination of isotopic composition by MC-ICP-MS.

 LIANG  Chi-Chi, LIU  Cong-Jiang, WANG  Zhong-Liang, SHU  Xiang-Kun, SONG  Liu-Ting, LI  Jin, TANG  Suo-Han   

  1. 1.School of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430074, China
    2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang  550002, China
    3.Key Laboratory of Isotopic Geology, Ministry of Land and Resources; Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
  • Received:2010-03-09 Revised:2010-03-31 Online:2010-07-01 Published:2010-07-01

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Abstract:

The factors influencing chromatographic separation of Cu and Zn from environmental samples (sediment, plant and suspended particulate material), such as resin column, elution volume, salinity and separation times were experimentally studied, and the optimal conditions of separating Cu and Zn from environmental samples were decided. AG MP1 resin (100200 mesh) was used as anion exchange resin and 7 mol/L HCl + 0.001% H2O2, 2 mol/L HCl+ 0.001% H2O2, 0.5 mol/L HNO3 were used as eluants, and then the eluants were collected at fitting volume respectively. This procedure can separate Cu and Zn effectively from sediment, plant, and suspended particulate matter (SPM) samples, the yield of which is close to 100%, and the isotope fractionation during which is small enough to be neglected. This method was successfully applied to the separation of Cu and Zn from the sediment, plant and suspended particulate materials in Hongfeng and Aha Lakes, and the δ65Cu and δ66Zn values of those samples were measured exactly by MCICPMS.

Key words: copper and zinc isotope, ion exchange, volume of elution; , separate result

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