期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 229, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.118009
关键词
SERS; Marbofloxacin; beta-CD-AgNPs; Detection
类别
资金
- Natural Science of Jilin Province [20170101020JC]
A novel surface enhanced-Raman spectroscopy (SERS) assay for marbofloxacin was developed based on beta-cyclodextrin-modified silver nanoparticles (beta-CD-AgNPs). The marbofloxacin could interact with beta-CD-AgNPs and a new assembly was formed by Ag-N covalent bond. This assembly was characterized by the spectra of FT-IR and UV-vis. The optimal measurement conditions were studied in detail. In 0.033 mol L-1 HCl solution, marbofloxacin had a sensitive SERS signal at 806 cm(-1). The enhancement factor (EF) was 2.11 x 10(7). There was a good linear correlation between the concentration of marbofloxacin and SERS intensity: the linear range was 0.003-0.03 mu mol L-1 (r(2)=0.996). The limit of detection (LOD) (S/N=3) was 1.7 nmol L-1 (S/N=3). Moreover, the influence of some interferences including Cu2+, K+, Zn2+, Ca2+, Na+, Mg2+, glucose and tiamulin on the determination were studied. The developed SERS method was used to detect the content of marbofloxacin in chicken and duck, the recovery was 101.3%-103.1% with RSD 4.07%-6.83%. (c) 2019 Elsevier B.V. All rights reserved.
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