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Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (S1): 44.

• Atomic Spectrometry • Previous Articles     Next Articles

Separation and Enrichment of Trace Mn(II),Co(II),Ni(II) and Cd(II) by Coprecipitation with two Carriers and Study on their Mechanism

SU Yao-Dong. ZHANG Bin-Ru1, XIA Qing1, CHENG Xiang-Sheng1, XU Ren2   

  1. 1. Department of Chemistry, Tongji University, Shanghai 200092, P. R. China;
    2. East China Sea Monitoring Center, State Oceanic Administration, Shanghai 200137, P. R. Chim
  • Online:1999-12-31 Published:1999-12-31

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Abstract:

Trace Mn(II), Co(II), Ni(II) and Cd(II)(2 ug/mL) were successfully coprecipitated with Copper Pyrrolidine Dithiocarbamate(Cu(II)-PDC) and Magnesium 8-hydroxyquinoline(Mg-8-QT) at pH3_6 and pH9-12 respectively and determined by FAAS. The recoveries were above 90%. 0.1-0.5 p g/ml of Co(II) and Ni(II) could also be quantitatively recovered. The study on coprecipitation mechanism by desorption methods was carried out. The results could be explained by the theory of Soft and Hard Acids and Bases (SHAB) successfully.

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