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Issue 40, 2019
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A self-referenced method for determination of patulin by surface-enhanced Raman scattering using gold nanobipyramids as the substrate

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Abstract

A novel surface-enhanced Raman scattering (SERS) probe was developed for the selective determination of patulin using gold nanobipyramids as the SERS substrate. Patulin undergoes a selective chemical reaction with sulfhydryl groups of 4-mercaptobenzoic acid (4-MBA) to form new compounds. A substantial change of the SERS spectrum of 4-MBA was observed and a new peak at 1641 cm−1 appeared. A significant increase in the intensity of the SERS signal at 1641 cm−1 was observed upon addition of more targets. This feature was exploited for sensitive quantification of patulin in aqueous solution by ratioing the intensities of the new peak at 1641 cm−1 and the peak of 4-MBA at 1586 cm−1. This method displayed excellent selectivity for patulin. Under optimal conditions, the ratioed signal intensity is related to the concentration of patulin in the range between 10 μg L−1 and 3000 μg L−1, with a detection limit of 6 μg L−1. This method was successfully used for the determination of patulin in juice.

Graphical abstract: A self-referenced method for determination of patulin by surface-enhanced Raman scattering using gold nanobipyramids as the substrate

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Publication details

The article was received on 29 Jun 2019, accepted on 01 Sep 2019 and first published on 05 Sep 2019


Article type: Paper
DOI: 10.1039/C9AY01366K
Anal. Methods, 2019,11, 5142-5149

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    A self-referenced method for determination of patulin by surface-enhanced Raman scattering using gold nanobipyramids as the substrate

    Y. Kang, H. Gu and X. Zhang, Anal. Methods, 2019, 11, 5142
    DOI: 10.1039/C9AY01366K

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