[Coprecipitation for preconcentration and determination of trace cadmium in solid waste phosphogypsum by FAAS].
CuS was used as a collector precipitate to preconcentrate and separate trace cadmium in phosphogypsum. The optimum coprecipitation conditions were studied, it was found that Cd could be quantitatively coprecipitated with CuS in sample solution at pH 5.8-7.0 and that 100 microg of Cu was enough to coprecipitate Cd in 50 mL of sample solution. No interferences of coexistent elements were found. A sample was detected for 6 times. The RSD was 7.97% and the recovery was between 88% and 110%. The method was rapid, simple and satisfactory for detecting Cd in phosphogypsum.
Zhang
M
M
Environmental Monitoring Station of Tongling City, 244000 Tongling.
D002104:Cadmium / Q000032:analysis*; D003300:Copper / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D007220:Industrial Waste / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods*
D007220:Industrial Waste; D002104:Cadmium; D003300:Copper; C017846:cupric sulfide