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  • Title: [Spectrophotometric determination of trace cadmium in polyferric sulphate flocculent].
    Author: Zheng H, Gao J, Yu Z.
    Journal: Guang Pu Xue Yu Guang Pu Fen Xi; 2000 Aug; 20(4):581-4. PubMed ID: 12945384.
    Abstract:
    A new sensitive method for determining trace cadmium in polyferric sulphate flocculent is proposed in the paper. The new sensitive method is spectrophotometric method. The color reagents are the butylrhodamin B and potassium iodide. The surfactant is the polyvingl alcohol(PVA). The maximum absorbency wavelength is 607 nm. The molar absorptivity is 4.99 x 10(5) L.mol-1.cm-1. The sandell sensitivity is 2.25 x 10(-4) micrograms Cd2+.cm-2. The Beer's law is obeyed for Cd(II) in the range of 0-1.5 micrograms.25 mL-1. The recovery is 96%-105% and the sample processing procedure is simple. This method has been applied to determination of trace Cd(II) in polyferric sulphate flocculent. The determining results are satisfactory.
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