Determination of trace cadmium in environmental samples by nanometer-titanium dioxide separation/preconcentration-graphite furnace atomic absorption spectroscopy

作者：Zhao Liang; Zhu Xiashi^*; Feng Ke; Wu Jun

来源：Chinese Journal of Analytical Chemistry, 2006, 34: S223-S226.

• nanometer aized titanium dioxide
• cadmium
• adsorption
• graphite furnace atomic absorption spectroscopy

A new method was proposed for the determination of Cd (II) using nanometer sized TiO2 (anatase) as solid phase extractant and detected by graphite furnace atomic absorption spectroscopy (GFAAS). The adsorption and desorption behavior of nanometer TiO2 towards Cd (II) was investigated. It was found that the adsorption fraction of Cd (II) was 97% at pH 8.0 and the elution with 3.0 mol/L HCl was sufficient for Cd(II). The detection limit(3 sigma) was 10.6 ng/L and RSD was 1.5% (n = 7, C = 2.0 mu g/L). The preconcentration factor was 50. The method was applied to the determination of Cd (II) in environmental samples and satisfactory results were obtained.

• 出版日期2006-9
• 单位扬州大学