Journal
TALANTA
Volume 128, Issue -, Pages 293-298Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2014.04.083
Keywords
Surface enhanced Raman spectroscopy; Antibiotics; Nitroimidazoles; Silver nanorods
Categories
Funding
- National Natural Science Foundation of China [21375051]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- UGA College of Agricultural and Environmental Sciences Experimental Station
- National Science Foundation [CBET-1064228]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1064228] Funding Source: National Science Foundation
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In this study, the surface enhanced Raman spectra (SERS) of two prohibited veterinary drugs, metronidazole (MNZ) and ronidazole (RNZ), have been acquired, and compared to the theoretically calculated spectra using density function theory (DFT). The experimental Raman and SERS spectra of MNZ and RNZ exhibit high resemblance with the DFT calculations. SERS detection of MNZ and RNZ from standard solutions as well as real environmental samples (tap, lake, swamp waters and soil) was performed on highly sensitive and reproducible silver nanorod array substrates. The limits of detection for MNZ and RNZ are 10 and 1 mu g/mL in methanol and ultra-pure water, respectively, and 10-50 mu g/mL in the environmental samples. The SERS-based method demonstrates its potential as a rapid, simple, and inexpensive means for the onsite screening of banned antibiotics from the aquatic and sediment environments, with minimal requirement for sample pretreatment. (C) 2014 Elsevier B.V. All rights reserved.
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