摘要
用火焰原子吸收光谱（FAAS）法探讨了纳米二氧化钛对Zn^2＋，Cu^2＋的吸附行为，研究了影响其吸附和解脱的主要因素及共存离子的干扰。以0．1mol／L的盐酸为解脱剂，可将吸附在纳米二氧化铁上的铜、锌定量洗脱。本法测得纳米二氧化钛对Cu^2＋，Zn^2＋的静态吸附容量分别为：12000μg／g，7400μg／g。Cu^2＋在0．1～2．0μg／mL之间线性良好，Zn^2＋在0．1～1．0μg／mL范围内线性良好，方法的检出限分别为23ng／mL，39ng／mL。本法用于环境样品中Cu^2＋，Zn^2＋的测定，相对标准偏差为0．9％～3．2％，加标回收率为93．4％～102．4％。
By flame atomic absorption spectrometry （FAAS）, the absorption behaviors of nanometer titanium dioxide on Zn^2＋ and Cu^2＋ were studied. The main factors of influencing absorption and desorption and the effects of coexisting ions were discussed. The Zn^2＋ and Cu^2＋ adsorbed on nanometer titanium dioxide could be eluted by 0.1 mol/L hydrochloric acid. The measured static absorption capacities of nanometer-sized titanium oxide on metal ions were 12 000 μg/g for Cu^2＋ and 7 400 μg/g for Zn^2＋. The results indicated that Cu^2＋ showed good linearity in the range of 0.1-2.0 μg/mL and Zn2＋ showed good linearity in the range of 0.1-1.0 μg/mL . The detection limits of this method for Cu^2＋ and Zn^2＋ were 23 ng/mL and 39 ng/mL. The method has been applied to the determination of Cu^2＋ and Zn^2＋ in environmental samples with the RSD of 0.9%- 3.2% and the recovery of 93.4%- 102.4%.
出处
《冶金分析》
CAS
CSCD
北大核心
2009年第3期72-75,共4页
Metallurgical Analysis
基金
国家自然科学基金(20877036)
科技部创新基金(05C26213100474)
江苏省研究生培养创新工程(CX07B_176z)
关键词
纳米二氧化钛
预富集
火焰原子吸收光谱法
锌
铜
nanometer titanium dioxide
pre-enrichment
flame atomic absorption spectrometry （FAAS）
zinc
copper
