Journal
TALANTA
Volume 153, Issue -, Pages 186-190Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2016.03.011
Keywords
Hydrogen bonding; Charge transfer; Surface-enhanced Raman scattering; Melamine detection
Categories
Funding
- National Natural Science Foundation of China [21303208, 21204089]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry [Y31Z55]
- Institute of High Energy Physics of the Chinese Academy of Sciences [2011IHEPYJRC504]
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We present a SERS-based method for the detection of melamine utilizing multi-hydrogen bonding induced charge-transfer (CT) effects. In this system, silver-2-nitro-5-mercaptobenzoic acids (Ag-TNBs) were chosen as the promising probe for melamine sensing. This method relies on the multi-hydrogen bonding between TNB and melamine which leads to significant Raman frequency shifts in Raman spectra. When being exposure to other potential interfering substances in milk, this system exhibits high selectivity towards melamine. The limit of detection (LOD) of this method is as low as 10(-12) M, which is far below the safety of FDA and USA. The proposed method can be further applied to monitoring the amount of melamine in both caw milk and milk powder. (C) 2016 Elsevier B.V. All rights reserved.
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