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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。
The adsorption of Cr () / Cr (superscript (superscript 2+)) on nano-Ti O2 was studied by ICP-AES and used for the speciation analysis of chromium in water sample. The results showed that the detection limits of Cr () and Cr () in the 10 m L sample were 61 ng / m L and 45 ng / m L, respectively, and their concentrations ranged from 0.1-1.0 μg / m L Good linearity, 50 times the amount of Cr () Cr () does not interfere with the detection. The relative standard deviation of Cr () and Cr () determined by this method are 3.6% and 4.2%, respectively (c = 2.0 μg / m L, n = 9). The method has good selectivity and is simple and rapid. Mineral water, water and tap water in the form of chromium, the result is more satisfactory.