摘要
利用 ICP- AES研究了纳米 Ti O2 材料对 Cr( ) / Cr( )的吸附性能 ,并将其用于水样中铬的形态分析。结果表明 ,该法对 1 0 m L试样测定 Cr( )和 Cr( )的检测限分别为 61 ng/ m L和 45ng/ m L ,其浓度在 0 .1～ 1 0μg/ m L范围内线性关系良好 ,50倍量的 Cr( )对 Cr( )的检测不产生干扰。本法测定 Cr( )和 Cr( )的相对标准偏差分别为3.6%和 4.2 % ( c=2 .0 μg/ m L,n=9) ,本法选择性好 ,简便 ,快速 ,用于测定矿泉水、湖水和自来水中铬的形态 ,结果较满意。
A simple and convenient method has been developed for the speciation of chromium(Ⅵ) and chromium(Ⅲ) in aqueous solution by selective adsorption on nanometer size TiO 2 powders and determination with ICP AES. The relative standard deviations at the 2 μg/mL level for chromium(Ⅵ) and chromium(Ⅲ) were 3.6% and 4.2%(n=9), and the corresponding limits of detection (3σ) were 61 ng/mL and 45 ng/mL, respectively. No obvious interference effects have been observed from co existed species. The proposed method has been successfully applied to the analysis of real water samples.
出处
《分析科学学报》
CAS
CSCD
2000年第4期300-303,共4页
Journal of Analytical Science
