Chinese Journal of Applied Chemistry

Chinese Journal of Applied Chemistry ›› 1989, Vol. 0 ›› Issue (4): 78-80.

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FLOATATION-SPECTROPHOTOMETRIC DETERMINATION OF Au,Bi AND Cd

Li Qianyi1, Fang Wenhuan2, Wu Shaozu2   

  1. 1. Department of Chemistry, Fuqin Branch College, Fujian;
    2. Department of Chemistry, Quanzhou Hua Qiao University, Quanzhou, Fujian
  • Received:1988-08-05 Revised:1988-12-29 Published:1989-08-10 Online:1989-08-10

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Abstract: Bromide complexes of Au(Ⅲ), Bi(Ⅲ) and Cd(Ⅱ) ions form associates with rhodamine B.The associated substances can be separated by floatation and determined for Au, Bi and Cd by air-acetylene flame atomic absorption-spectrophotometry. The optimum conditions for.the determination are described. The floating recovery ratio is greater than 90%. By this method, it is possible to determine trace amount of Au, Bi and Cd in sea water, pure zinc plates and minerals. Co2+, Ni2+, Ca2+, Al+3,Fe3+, Mg2+, Mn2+, Cr3+,K+ and Zn2+ etc.do not interfere the determination. The detection Iimit was found to be 25ng/mL for Au,60ng/mL (for Bi) and Cd 4.5ng mL (for Cd) respectively.

Key words: Extraction-floatation, Rhodamine B, Gold, Cadmium, Bismuth, Atomic absorption spectrophotometry

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