Indexed by:期刊论文

Date of Publication:2011-08-01

Journal:ELECTROANALYSIS

Included Journals:SCIE

Volume:23

Issue:8

Page Number:1863-1869

ISSN No.:1040-0397

Key Words:Tetracycline (TC); Electrochemical sensor; Multiwall carbon nanotubes (MWNTs); Gold nanoparticles (GNPs); Molecularly imprinted polymer (MIP)

Abstract:This paper reports the use of a tetracycline (TC) sensor constructed from a combination of molecularly imprinted polymer (MIP) and gold nanoparticles modified multiwall carbon nanotubes (MWNTs-GNPs). The results demonstrated that the amount of recognition sites in the polymer was significantly increased and the electron transfer ability of the sensor was improved. The relationship between the peak current and the TC concentration was linear in the range from 0.1 to 40 mg L(-1), and the detection limit was 0.04 mg L(-1) (SIN=3). The peak current to TC was 4.3, 6.2 and 6.8 times larger than that of oxytetracycline, chloramphenicol and nafcillin, respectively. Thus, the combination of MIP and MWNTs-GNPs provides a sensitive and selective electrochemical detection method for tetracycline.