摘要
研究了介孔Ti O2分离富集材料的制备及其对Cd(Ⅱ)的吸附性能,考察了影响吸附和解吸的主要因素。pH=6.0时,介孔Ti O2能定量吸附溶液中的痕量Cd(Ⅱ),其静态饱和吸附容量为57.8 mg/g。吸附在介孔Ti O2上的Cd(Ⅱ)可用1 mol/L HCl洗脱,洗脱液中的Cd(Ⅱ)用火焰原子吸收法测定。本法对Cd(Ⅱ)的检出限(3σ)为23.3 ng/mL,相对标准偏差(RSD)为2.0%(n=7,c=1.0μg/mL),回收率在94.0%～102.5%之间。该方法用于矿样中痕量Cd(Ⅱ)的测定,结果满意。
Mesoporous TiO2 material was self-prepared and its adsorption performance towards Cd（Ⅱ） were studied.The optimum conditions of adsorption and desorption were investigated.Trace Cd（Ⅱ） in solution was quantitatively adsorbed by mesoporous TiO2 at pH=6.0,and the capacity of static saturated adsorption was 57.8 mg/g.Cd（Ⅱ） was completely eluted with 1.0 mol/L HCl and the Cd（Ⅱ） eluted was determined by flame atomic absorption spectrometry.The detection limit（3σ） was 23.0 ng/mL,and the relative standard deviation（RSD） was 2.0%（n=7,c=1.0 μg/mL）.The recoveries were 94.0%～102.5%.It has been applied to the determination of cadmium in mineral samples with satisfactory results.
出处
《分析科学学报》
CAS
CSCD
北大核心
2011年第1期61-64,共4页
Journal of Analytical Science
关键词
介孔TIO2
分离与富集
火焰原子吸收法
矿样
镉
Mesoporous TiO2
Separation and preconcentration
Flame atomic absorption spectrometry
Mineral sample
Cadmium
