Highly reproducible and sensitive silver nanorod array for the rapid detection of Allura Red in candy

文献类型： 外文期刊

第一作者： Yao, Yue

作者： Yao, Yue;Wang, Wen;Tian, Kangzhen;Han, Caiqin;Qu, Lulu;Li, Haitao;Yao, Yue;Wang, Wen;Tian, Kangzhen;Han, Caiqin;Ingram, Whitney Marvella;Cheng, Jie

作者机构：

关键词： SERS; Allura Red; Silver nanorods; DFT

期刊名称：SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY （ 影响因子：4.098； 五年影响因子：3.464 ）

ISSN： 1386-1425

年卷期： 2018 年 195 卷

页码：

收录情况： SCI

摘要： Allura Red (AR) is a highly stable synthetic red azo dye, which is widely used in the food industry to dye food and increase its attraction to consumers. However, the excessive consumption of AR can result in adverse health effects to humans. Therefore, a highly reproducible silver nanorod (AgNR) array was developed for surface enhanced Raman scattering (SERS) detection of AR in candy. The relative standard deviation (RSD) of AgNR substrate obtained from the same batch and different batches were 5.7% and 11.0%, respectively, demonstrating the high reproducibility. Using these highly reproducible AgNR arrays as the SERS substrates, AR was detected successfully, and its characteristic peaks were assigned by the density function theory (DFT) calculation. The limit of detection (LOD) of AR was determined to be 0.05 mg/L with a wide linear range of 0.8-100 mg/L. Furthermore, the AgNR SERS arrays can detect AR directly in different candy samples within 3 min without any complicated pretreatment. These results suggest the AgNR array can be used for rapid and qualitative SERS detection of AR, holding a great promise for expanding SERS application in food safety control field. (C) 2018 Elsevier B.V. All rights reserved.

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