Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 114, Issue -, Pages 80-84Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2013.05.055
Keywords
Azodicarbonamide; Biurea; Semicarbazide hydrochloride; SERS detection; DFT
Categories
Funding
- Key Technology R&D Program in Jiangsu province [BE2012631]
- National Natural Science Foundation of People' Republic of China [21203076]
- State Key Laboratory of Supramolecular Structure and Materials [sklssm 201328]
- National Key Technology RD Program [2012BAD36B02]
- Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD)
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Azodicarbonamide is widely applied in the food industry as a new flour gluten fortifier in China: Canada, the United States, and some other countries, whose metabolites of biurea and semicarbazide hydrochloride are reaction products during baking. In this study, IR, Raman and surface-enhanced Raman scattering (SERS) spectra of azodicarbonamide, biurea, and semicarbazide hydrochloride have been studied, and vibrational bands have been assigned on the basis of density functional theory (DFT) calculations. The calculated Raman spectra were in good agreement with experimental Raman spectra. The SERS method coupled with active gold substrates has also been applied for detection of the three chemicals with pure water as solvent, with the limit of detection of this method being as low as 10 mu g/mL (less than 45 mu g/mL). These results showed that azodicarbonamide and its metabolites could be detected by the vibrational spectra technique, which might be applied as a powerful tool for the rapid detection on these species derived from agents added to flour. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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