期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 759, 期 -, 页码 101-106出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2015.10.039
关键词
Voltammetric analysis; Mercury determination; Modified carbon paste electrodes; Crown ether; Multi-walled carbon nanotubes; Biological and environmental analysis
资金
- [1014002 NRC]
An electrochemical assay for sensitive and selective determination of mercury was suggested. Preparation, characterization, and testing of the electro-catalytic activity of Crown-ether/multi-walled carbon nanotubes (MWCNTs)/CPEs were performed. The voltammetric responses of modified electrodes with various sensing elements and nanomaterials were carefully investigated. Consequently, improving the sensitivity and selectivity were achieved using a combination of 12-crown-4-ether and MWCNTs (10% w/w for each). A linear response was observed from 5 to 110 mu g/ml, with the detection limit (S/N = 3) of 0.25 mu g/ml. The method was interference free from many species and successfully applied for the determination of mercury in blood, urine or tab-water samples with a high accuracy and precision comparable with the reference method (Atomic Absorption Spectroscopy AAS). (C) 2015 Elsevier B.V. All rights reserved.
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