Determination of Trace Lead and Iron in Nickel Chloride and Manganese Sulfate by Flame Atomic Absorption Spectrometry after Coprecipitation with Yttrium Phosphate
SU Yao-dong, ZHU Wen-ying, MA Hong-mei, CHEN Long-wu
Department of Chemistry, Tongji University, Shanghai 200092, China
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 H3PO4 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 (3σ) of lead and iron in 20 mL solution were 1.63×10-2 mg·L-1 and 4.58×10-2 mg·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.
Key words：Lead;Iron;Yttrium phosphate;Coprecipitation;Separation and preconcentration;Flame atomic absorption spectrometry
苏耀东，朱文颖，马红梅，陈龙武 . 磷酸钇共沉淀分离富集原子吸收光谱测定氯化镍和硫酸锰中的痕量铅和铁 [J]. 光谱学与光谱分析, 2006, 26(09): 1732-1734.
SU Yao-dong, ZHU Wen-ying, MA Hong-mei, CHEN Long-wu. Determination of Trace Lead and Iron in Nickel Chloride and Manganese Sulfate by Flame Atomic Absorption Spectrometry after Coprecipitation with Yttrium Phosphate . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(09): 1732-1734.
