Hydrophobic paper-based SERS platform for direct-droplet quantitative determination of melamine.

Authors :: Zhang C
You T
Yang N
Gao Y
Jiang L
Yin P
Source :: Food chemistry [Food Chem] 2019 Jul 30; Vol. 287, pp. 363-368. Date of Electronic Publication: 2019 Feb 28.
Publication Year :: 2019
Abstract: A novel hydrophobic-SERS substrate platform based on silver nanoparticles (AgNPs) functionalized commercially available filter paper was reported. Compared with conventional substrates, not only could this novel SERS substrate meet the requirements of simple and large-scale preparation, but also realized direct droplet-detection with reusable property. In this work, the fabrication, physical characterization, and SERS sensitivity of the substrates to spot-on food determination were studied. The experimental results show the method exhibited high reproducibility with less than 9% spot-to-spot variation in Raman intensity. Furthermore, the method was successfully applied to detect melamine in diluted milk with the instrument detection limit (IDL) down to 1 ppm in a linear correlation (1 ppm-1000 ppm). In addition, this SERS substrate could also be applied successfully in other fields, such as the determination of pesticide (thiram) and dye (malachite green) in real environment.<br /> (Copyright © 2019 Elsevier Ltd. All rights reserved.)

Subjects :: Animals
Food Analysis methods
Hydrophobic and Hydrophilic Interactions
Limit of Detection
Metal Nanoparticles chemistry
Paper
Pesticides analysis
Reproducibility of Results
Rosaniline Dyes analysis
Silver chemistry
Spectrum Analysis, Raman instrumentation
Thiram analysis
Food Contamination analysis
Milk chemistry
Spectrum Analysis, Raman methods
Triazines analysis

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