摘要
本文通过水热合成法制备了SiO2微球,并研究SiO2微球在弱碱性条件下对Ag(Ⅰ)的吸附性能,建立了SiO2微球固相萃取-火焰原子吸收光谱法(AAS)测定痕量Ag(Ⅰ)的新方法。结果表明:在0.02mol·L^-1 NaOH溶液介质中,Ag(Ⅰ)能被定量吸附,且能被2.0mL的12g·L^-1硫脲-4%HCl混合液快速定量洗脱。方法的检出限(3σ)为0.59μg·L^-1,富集倍数为50。该方法用于水样中痕量Ag(Ⅰ)的测定,加标回收率在95.0%-104.0%范围。
Silicon microspheres was prepared by hydrothermal synthesis method,and its adsorptive behaviors for Ag(Ⅰ)in weak alkali conditions was studied in detail.The material was developed for the preconcentration/separation of trace Ag(Ⅰ)by solid phase extraction flame atomic absorption spectrometry(FAAS)determination.In 0.02 mol·L^-1 NaOH media,Ag(Ⅰ)can be quantitatively adsorbed,and readily desorbed with 2.0mL of 4%HCl-12g·L^-1 thiourea.With an enrichment factor of 50,the detection limit of Ag(Ⅰ)is 0.59μg·L^-1.The proposed method has been applied to determination of trace Ag(Ⅰ)in waters with recoveries of 95.0%-104.0%.
出处
《分析科学学报》
CAS
CSCD
北大核心
2015年第2期198-202,共5页
Journal of Analytical Science
基金
湖北省教育厅重点项目(No.D20132501)
污染物分析与资源化技术湖北省重点实验室开发基金(No.KL2013M06)
湖北省稀有金属协同创新中心项目