Citation:
Li Qianyi, Fang Wenhuan, Wu Shaozu. FLOATATION-SPECTROPHOTOMETRIC DETERMINATION OF Au, Bi AND Cd[J]. Chinese Journal of Applied Chemistry,
;1989, 6(4): 78-80.
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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.
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