SERS信号统一策略:制备AuNPs@4-MBA及其在混合乳酸细菌中的定量检测
Shijie Liu1, Qian Ding1, Lijun Zhao1
1College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, PR China; Sauce braised and prefabricated products modern production school enterprise research and development center, Henan Agricultural University, Zhengzhou 450002, PR China.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|September 13, 2025
概括
这项研究引入了一种新的SERS基质,用于快速识别和量化乳酸细菌物种. 该方法为在复杂环境中检测混合细菌培养提供了高精度.
科学领域:
- 分析化学 分析化学
- 生物技术是生物技术.
- 食品科学 食品科学 食品科学
背景情况:
- 准确识别和量化乳酸细菌 (LAB) 对食品质量和安全至关重要.
- 传统的LAB检测方法往往耗时且劳动密集.
- 为LAB开发快速和灵敏的检测技术是一个持续的挑战.
研究的目的:
- 开发一种快速的方法来识别不同种类的乳酸细菌.
- 建立一种快速定量检测混合乳酸细菌的技术.
- 使用表面增强拉曼光谱 (SERS) 与金纳米粒子 (AuNPs) 进行实验室分析.
主要方法:
- 准备的金纳米颗粒功能化与4-mercaptobenzoic酸 (AuNPs@4-MBA) 作为一个SERS基质.
- 获取SERS光谱,用于 *Lactobacillus plantarum* Y1 和 *Pediococcus pentosaceus* Z1.1. 这两种细菌.
- 使用主要组件分析 (PCA) 和线性差异分析 (LDA) 构建分类学识别模型.
- 开发基于SERS的定量方程,用于混合LAB检测.
主要成果:
- AuNPs@4-MBA基质表现出极好的增强因子 (3.08 × 102) 和可重复性 (RSD < 10%).
- 在L. plantarum* Y1和P. pentosaceus* Z1之间明显的SERS光谱差异被清楚地观察到.
- PCA和LDA成功实现了不同LAB物种的完整视觉分类和识别.
- 建立了一个SERS定量方程 (y = 7509.32x - 5942.69,R2 = 0.99),检测极限低于10 CFU/mL.
- 该方法在复杂的环境矩阵中显示出混合LAB的高检测精度 (96.34%103.54%).
结论:
- 开发的AuNPs@4-MBA SERS基质为快速定性识别LAB物种提供了一个有前途的策略.
- 基于SERS的定量模型可以准确地实时监测混合LAB度.
- 这种技术为在各种应用中快速分析LAB提供了显著的进步,包括食品安全.
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