磁性碳纳米管固相萃取-原子荧光光谱法测定水中痕量镉
AFS Determination of Trace Cadmium in Water by Solid-Phase Extraction with Magnetic Multi-Walled Carbon Nanotubes
摘 要
建立了检测水中痕量镉的磁性固相萃取-原子荧光光谱法.制备磁性碳纳米管,以其作为固相萃取吸附剂用来萃取和富集水中的痕量镉,采用氢化物发生-原子荧光光谱法进行检测.在最佳条件下,镉在0.05~5.0 μg·L-1范围内呈线性,检出限(3σ)为1.6 ng·L-1.加标回收率在97.1%~101%之间,测定值的相对标准偏差在1.6%~4.8%之间.方法用于分析标准物质,测定值与认定值相符.
镉
磁性碳纳米管
固相萃取
AFS
Cadmium
Magnetic carbon nanotubes
Solid-phase extraction
Abstract
A method of atomic fluorescence spectrometry combine with magnetic solid-phase extraction was established for the determination of trace cadmium in water. Magnetic multiwalled carbon nanotubes were synthesized,and used as a solid-phase extraction sorbent for extraction and concentration of trace cadmium in water. Then cadmium was detected by hydride generation-atomic fluorescence spectrometry. Under optimized conditions,the linear range of cadmium was 0.05-5.0 μg·L-1,with detection limit (3σ) of 1.6 ng·L-1. The recovery rates measured by standard addition method were in the range of 97.1%-101%,with RSD were in the range of 1.6%-4.8%. The method was used for the analysis of standard substance,giving results in agreement with the certified values.
中图分类号 O657.31 DOI 10.11973/lhjy-hx201506005
所属栏目 工作简报
基金项目 江苏省卫生厅预防医学科研基金(Y2013037);淮安市科技局科技支撑(社会发展)项目基金(HAS201303);淮安市预防医学科研课题项目(HAYF201514)
收稿日期 2014/12/9
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联系人作者王露(664686545@qq.com)
备注王露(1987-),女,江苏淮安人,检验师,硕士研究生,主要从事理化检验.
引用该论文: WANG Lu,WANG Yi,HANG Xue-yu,WANG Qin,FENG Xiao-qing,SONG Xin. AFS Determination of Trace Cadmium in Water by Solid-Phase Extraction with Magnetic Multi-Walled Carbon Nanotubes[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2015, 51(6): 753～755
王露,汪怡,杭学宇,王芹,冯晓青,宋鑫. 磁性碳纳米管固相萃取-原子荧光光谱法测定水中痕量镉[J]. 理化检验－化学分册, 2015, 51(6): 753～755
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