用银纳米集群修改的多重复合头空间基于纸张的分析设备,用于基于智能手机的无机防腐剂在食品样本中的发光测定
Nerea Villarino1, Isela Lavilla1, Francisco Pena-Pereira1
1Centro de Investigación Mariña, Universidade de Vigo, Departamento de Química Analítica e alimentaria, Grupo QA2, Edificio CC Experimentais, Campus de Vigo, As Lagoas, Marcosende, 36310, Vigo, Spain.
Analytica chimica acta
|February 9, 2026
概括
这项研究引入了基于光银纳米集群的新型纸张分析装置 (PADs),用于同时检测食品中的硫酸盐和酸盐. 这些负担得起的纳米传感器为食品安全监测提供了敏感和选择性的替代方案.
科学领域:
- 分析化学 分析化学
- 纳米科学是一个纳米科学.
- 食品科学 食品科学 食品科学
背景情况:
- 对亚酸盐和硫酸盐等无机化学防腐剂的准确量化对于食品安全至关重要.
- 这些防腐剂的传统分析方法正在被小型化,敏感的替代品所取代.
- 发光纳米传感器是有前途的,但需要增强的选择性和复杂的复杂食物矩阵的复杂化.
研究的目的:
- 开发基于纸的分析设备 (PADs),利用发光银纳米集群 (AgNCs) 进行硫酸盐和酸盐的同时检测.
- 创建一个智能手机辅助的小型感应平台,用于食品分析.
- 提高纳米传感器的选择性和多重复合能力,用于食品安全应用.
主要方法:
- 开发了两种PAD配置:基于瓶内PAD的头部空间微提取 (HS-PAD) 和头部空间3D原形微流体PAD (HS-μPAD).
- 使用的AgNCs用聚甲酸和聚乙烯胺作为酸盐和硫酸盐的选择性纳米受体进行保护.
- 采用头部空间采样以在现场形成和选择性捕获挥发性衍生物,从而导致发光灭.
主要成果:
- 达到低检测极限:硫酸盐的0.29μM和酸盐的0.23μM与HS-PAD;与HS-μPAD的1.9μM和3.2μM.
- 证明了高可重复性,两种配置的相对标准偏差低于7.3%.
- 在真实食品样本中验证了基于PAD的纳米传感器,与参考方法有很好的一致性.
结论:
- 首份关于多重复合纸质纳米传感器的报告,使用具有不同响应能力的AgNCs进行头部空间采样.
- 开发的测定方法提供了分散的,负担得起的和简单的硫酸盐和酸盐检测.
- 这些纳米传感器为食品行业的质量控制和安全监测提供了有价值的替代方案.
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