用于食品中 HO 残留检测的化学可再生 SERS 传感器。
Chemically renewable SERS sensor for the inspection of HO residue in food stuff.
机构信息
The Education Ministry Key Lab of Resource Chemistry, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China.
The Education Ministry Key Lab of Resource Chemistry, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China.
出版信息
Food Chem. 2024 Apr 16;438:137777. doi: 10.1016/j.foodchem.2023.137777. Epub 2023 Oct 15.
Hydrogen peroxide (HO) residue in foodstuffs will bring great harm to human health. We immobilize the composite of the reduced polyaniline (PANI) modified gold nanoparticles on the surface of ITO (ITO/AuNPs/PANI) to develop surface-enhanced Raman scattering (SERS) sensor for HOdetection. The principle is that PANI is oxidized by HO to generate a new SERS peak at 1460 cm for realizing quantitative analysis of HO. Fe-Fenton reaction is introduced to catalytically react with HO to hydroxyl radical, which speeds up the oxidation of PANI. Before SERS detection, acidic treatment could guarantee the reduced state of PANI in composite. Limit of detection of ITO/AuNPs/PANI-based SERS assay for HO is down to 1.78 × 10 mol/L and a good linear relationship from 1 × 10 to 3.16 × 10 mol/L is achieved. Furthermore, the SERS sensor could be regenerated by acidic treatment. As a scenario, the renewable SERS sensor is utilized to monitor HO residues in food and environmental samples.
食品中过氧化氢（HO）残留会对人体健康造成极大危害。我们将还原态聚苯胺（PANI）修饰的金纳米粒子复合物固定在 ITO 表面上（ITO/AuNPs/PANI），开发用于 HO 检测的表面增强拉曼散射（SERS）传感器。其原理是 PANI 被 HO 氧化，在 1460 cm 处产生新的 SERS 峰，实现 HO 的定量分析。Fe-Fenton 反应被引入催化 HO 与羟基自由基反应，从而加速 PANI 的氧化。在 SERS 检测之前，酸性处理可以保证复合物中 PANI 的还原状态。基于 ITO/AuNPs/PANI 的 SERS 分析测定 HO 的检测限低至 1.78×10 mol/L，并且在 1×10 到 3.16×10 mol/L 之间实现了良好的线性关系。此外，SERS 传感器可以通过酸性处理再生。作为一种情况，可再生的 SERS 传感器用于监测食品和环境样品中的 HO 残留。
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