Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 193, Issue -, Pages 630-636Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.12.024
Keywords
Melamine; Gold nanoparticles; Tri-sodium citrate; Dodecasodium of phytic acid; Filter paper; Raman probe
Funding
- National Natural Science Foundation of China [21073121]
- PCSIRT [IRT1269]
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The rapid sensing for melamine in milk products has been developed with a portable Raman system based on the facile synthesis of tri-sodium citrate and dodecasodium of phytic acid (IP6) dual-functionalized gold nanoparticles modified filter paper, shortly named IP6-TC@Au NPs test paper. The tri-sodium citrate improved the sensitivity of Raman probe and the later kept the shelf stability. The limit of detection for melamine in water is 5 mu M (0.63 ppm) and it is 10 mu M (1.26 ppm) for testing real milk sample, which is well below the FDA's tolerance level of 2.5 ppm in milk. The proposed easy assay of IP6-TC@Au NPs test paper combining with portable Raman system could be applied for on-site monitoring melamine in milk products. (C) 2013 Elsevier B.V. All rights reserved.
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