Abstract
In this study, a sensitive surface-enhanced Raman scattering (SERS) sensor based on core–shell-structured Au@Ag nanoparticles (NPs) was successfully developed for the detection of acrylamide (AA) in foods. Coating Au NPs with a shell of silver gave the Au@Ag NPs outstanding SERS performance for AA detection. Under the optimal experimental conditions, a good linear relationship was established SERS intensity at 1272 cm−1 and the logarithm of the AA concentration (over the concentration range 10−8‒10−3 mol L−1). The limit of detection (LOD) of the SERS method was 1.27 × 10−9 mol L−1. The recoveries of AA in spiked cookie samples were in the range of 85.68–102.50%. In addition, the SERS sensor was used to determine the content of AA in three food samples (potato chips, fried dough twist, and instant coffee), with the results obtained being consistent with those determined by high-performance liquid chromatography (HPLC), demonstrating that the SERS sensor was suitable for the detection of AA in real food samples.
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Funding
This work was financially supported by the Innovation Capability Improvement Project of Scientific and Technological Small and Medium-sized Enterprises in Shandong Province (No. 2022TSGC2409), and funding support from the MacDiarmid Institute for Advanced Materials and Nanotechnology, and the Dodd Walls Centre for Photonic and Quantum Technologies was provided.
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Haoyu Wang wrote the main manuscript text; Li Zhang prepared figures 1-5, table 1, table 2, and supplementary materials; Chen Chen and Yufeng Sun modified all figures and tables; G.I.N. waterhouse polished the language of the whole text; Zhixiang Xu made the final revisions of the text.
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Wang, H., Zhang, L., Chen, C. et al. SERS Sensor Based on Core–Shell Au@Ag Nanoparticles for the Sensitive Detection of Acrylamide in Foods. Food Anal. Methods 17, 585–593 (2024). https://doi.org/10.1007/s12161-024-02590-0
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DOI: https://doi.org/10.1007/s12161-024-02590-0