期刊
TALANTA
卷 130, 期 -, 页码 192-197出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2014.07.003
关键词
Polyelectrolyte multilayers; Magnetic solid phase extraction; Copper; Drinking water; FAAS
资金
- National Natural Science Foundation of China [21205028]
- Program for Science and Technology Innovation Talents in Universities of Henan Province [13HASTIT016]
- Program for Innovative Research Team from Zhengzhou [131PCXTD605]
- Foundation for University Key Teacher by He'nan Educational Committee [2012GGJS-300]
- Seed Fund for Science and Technology Creative Talents of Henan University of Technology [11CXRC11]
A novel magnetic silica sorbent with polyelectrolyte multilayers (PEMs) on its surface was prepared, and the sorbent was used for the magnetic solid phase extraction (MSPE) of trace Cu2+ in drinking water with flame atomic absorption spectrometry (FAAS) as the detector. The experimental parameters for the MSPE procedure, such as the pH, desorption conditions, ultrasonic time and co-existing ions effects, were investigated. The adsorption capacity of the new sorbent was 14.7 mg g(-1) for Cu2+. The detection limit of the developed method was 0.23 ng mL(-1) for Cu2+ with an enrichment factor of 95.7. The analytical data obtained from the certified reference water and rice samples were in good agreement with the certified values. This method was also successfully applied to the determination of trace Cu2+ in different food samples with satisfactory results. (C) 2014 Elsevier B.V. All rights reserved.
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