Journal
APPLIED SPECTROSCOPY
Volume 64, Issue 7, Pages 781-785Publisher
SAGE PUBLICATIONS INC
DOI: 10.1366/000370210791666426
Keywords
Surface-enhanced Raman spectroscopy; SERS; Melamine; Ag nanorod substrates; Multi-well arrays
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Funding
- China Scholarship Council
- USDA CSREES [2009-35603-05001]
- NIFA [2009-35603-05001, 582656] Funding Source: Federal RePORTER
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Silver nanorod (AgNR) array substrates are investigated to detect pure melamine dissolved in 50% methanol using surface-enhanced Raman spectroscopy (SERS). We find that sample preparation conditions have a great influence on melamine detection. When the samples are prepared under a nitrogen glove box, the SERS characteristic peak intensities of melamine at Delta v = 497 cm(-1), 704 cm(-1), and 983 cm(-1) are studied as functions of melamine concentration and/or the mass of melamine. The peak intensities increase almost linearly when the melamine concentration increases from 0.1 mg/L to 10 mg/L and saturate when melamine concentration is greater than 50 mg/L. The bulk melamine limit of detection (LOD) is 0.1 mg/L, which is one order of magnitude less than the current standard. This study shows that AgNR based SERS detection can be used as a fast, highly sensitive, and quantitative detection method for melamine.
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