Nitrite is commonly used as a preservative and color fixative in the meat industry. However, the risk of it transforming into N-nitrosamine restricts its intake. Herein, a novel sensitive Ag-coated nanofiber surface-enhanced Raman scattering (SERS) platform was developed for rapid nitrite detection. The electrospraying technique was firstly used to assemble Ag nanoparticles (NPs) on the nanofibers to obtaine SERS platform. The homogeneity and long-term stability of the SERS platform were evaluated. The limit of detection (LOD) of the SERS platform was estimated to be 2.216 × 10⁻¹² mol/L, corresponding to 15.29 ng·L⁻¹ and good linearity was shown between the relative SERS intensity and nitrite concentration range of 10–1 to 10⁻⁴ mol/L. The Ag-coated nanofiber SERS platform was utilized to assay-five common nitrite foods, and the results provided valid evidence for the compatibility of SERS platform in quantitative nitrite detection.

亚硝酸盐在肉类工业中通常用作防腐剂和颜色固定剂。然而，它转化为N-亚硝胺的风险限制了它的摄入量。在此，开发了一种新型灵敏的 Ag 涂层纳米纤维表面增强拉曼散射 (SERS) 平台，用于快速亚硝酸盐检测。电喷雾技术首先用于在纳米纤维上组装银纳米粒子 (NPs) 以获得 SERS 平台。评估了 SERS 平台的均匀性和长期稳定性。SERS 平台的检测限 (LOD) 估计为 2.216 × 10 ^-12 mol/L，对应于 15.29 ng·L ^-1并且在相对 SERS 强度和亚硝酸盐浓度范围 10–1 之间显示出良好的线性关系到 10 ^-4摩尔/升。利用镀银纳米纤维SERS平台对五种常见亚硝酸盐食品进行了检测，结果为SERS平台在亚硝酸盐定量检测中的兼容性提供了有效依据。