title: [Determination of trace lead and iron in nickel chloride and manganese sulfate by flame atomic absorption spectrometry after coprecipitation with yttrium phosphate].
abstract: Using yttrium phosphate as the coprecipitation collector for the separation and preconcentration of trace lead and iron in nickel chloride and manganese sulfate, flame atomic absorption spectrometric (FAAS) determination was described in the present paper. Coprecipitation parameters including the pH of the solution, and the amounts of YCl3 and H3 PO4 were discussed. It was found that lead and iron in nickel chloride could be coprecipitated quantitatively in the range of pH 3.0-4.0, and so could be lead in manganese sulfate. The detection limits (3sigma) of lead and iron in 20 mL solution were 1.63 x 10(-2) mg x L(-1) and 4.58 x 10(-2) mg x L(-1) respectively. In NiCl2 solution the standard addition recoveries for lead and iron were 100.91% and 99.73% respectively, and in MnSO4 solution the standard addition recoveries were 99.45% and 98.98% respectively. The method has eliminated the interference of matrix, and the result is satisfied.
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Yao-Dong
authors.initials: YD
authors.lastname: Su
authors.forename: Wen-Ying
authors.initials: WY
authors.lastname: Zhu
authors.forename: Hong-Mei
authors.initials: HM
authors.lastname: Ma
authors.forename: Long-Wu
authors.initials: LW
authors.lastname: Chen
mesh_terms: D011232:Chemical Precipitation; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000032:analysis* / Q000302:isolation & purification / Q000592:standards; D007854:Lead / Q000032:analysis* / Q000302:isolation & purification / Q000592:standards; D017895:Manganese Compounds / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry; D012015:Reference Standards; D015203:Reproducibility of Results; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013431:Sulfates / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry*
chemical_list: D017895:Manganese Compounds; D010710:Phosphates; D013431:Sulfates; D007854:Lead; D015019:Yttrium; C022838:nickel chloride; D009532:Nickel; D007501:Iron; C039798:manganese sulfate