标题：Preconcentration of Ultra-Trace Germanium in Water Samples with Nano-Sized TiO2 Colloid and Determination by HGAFS with Colloid Sampling
作者：Qian, SH(Qian Sha-hua); Lu, M(Lu Min); Zhang, X(Zhang Xu)
来源出版物：SPECTROSCOPY AND SPECTRAL ANALYSIS卷：32 期：5 页：1397-1400 出版年：MAY 2012
摘要：A novel method for preconcentration of ultra-trace germanium and determination by hydride generation atomic fluorescence spectrometry (HGAFS) was presented in this work. When the pH values of solution were 6.0 similar to 8.0, the adsorption efficiency of nano-sized TiO2 colloid for germanium was 97.0%similar to 99.0% in a short time. Nano-sized TiO2 colloid was used to concentrate the ultra-trace germanium in water sample due to its high absorption capacity. After centrifugation, the supernatant fluid was removed. The sediment which contained the concentrated Ge(IV) was inverted to colloid by adding HCl of certain concentration. Ge(IV) in colloid was directly determined by HGAFS. The proposed method possesses low detection limit (3 sigma) (0.060 mu g.L-1) and good precision (the relative standard deviation (RSD) is 2.0%, n=6). The method is was also quite simple and time saving (without any filtration and desorption process). Satisfactory results were obtained when applying this method to the determination of ultra-trace germanium in water samples.
作者关键词：Nano-sized TiO2 colloid, Preconcentration, Ultra-trace germanium, HGAFS
通讯作者地址：Qian, SH (通讯作者),Wuhan Univ, Sch Resources & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China
[Qian Sha-hua; Lu Min; Zhang Xu] Wuhan Univ, Sch Resources & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China