期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 333, 期 -, 页码 137-143出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2017.03.035
关键词
Cadmium ions; Ion-imprinted polymers; Paper sensor; Colorimetric detection; Water monitoring
资金
- National Nature Science Foundation of China [21207044, 21577042]
- Young Talent Project of Health and Family Planning Commission of Hubei Province [WJ2015Q011]
- Entry-Exit Inspection and Quarantine Bureau of PRC [2015IK121]
Paper-based sensor is a new alternative technology to develop a portable, low-cost, and rapid analysis system in environmental chemistry. In this study, ion imprinted polymers (IIPs) using cadmium ions as the template were directly grafted on the surface of low-cost print paper based on the reversible addition fragmentation chain transfer polymerization. It can be applied as a recognition element to selectively capture the target ions in the complex samples. The maximum adsorption capacity of IIPs composites was 155.2 mg g(-1) and the imprinted factor was more than 3.0. Then, IIPs-paper platform could be also applied as a detection element for highly selective and sensitive detection of Cd(II) ions without complex sample pretreatment and expensive instrument, due to the selective recognition, formation of dithizone-cadmium complexes and light transmission ability. Under the optimized condition, the linear range was changed from 1 to 100 ng mL(-1) and the limit of detection was 0.4 ng mL(-1). The results were in good agreement with the classic ICP-MS method. Furthermore, the proposed method can also be developed for detection of other heavy metals by designing of new IIPs. (C) 2017 Elsevier B.V. All rights reserved.
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