title: [Spectrophotometric determination of trace cadmium in polyferric sulphate flocculent].
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.
authors.affiliation: Faculty of Applied Science and Technology, Chongqing University (B section), 400045 Chongqing.
authors.forename: H
authors.initials: H
authors.lastname: Zheng
authors.forename: J
authors.initials: J
authors.lastname: Gao
authors.forename: Z
authors.initials: Z
authors.lastname: Yu
mesh_terms: D002104:Cadmium / Q000032:analysis*; D005290:Ferric Compounds / Q000737:chemistry; D005427:Flocculation; D013056:Spectrophotometry, Ultraviolet; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D018508:Water Purification / Q000379:methods
chemical_list: D005290:Ferric Compounds; D002104:Cadmium; C024823:ferric sulfate