在牛肉中快速检测食源性致病细菌,使用表面增强的拉曼光谱
Huixin Zuo1, Yingying Sun1,2, Mingming Huang1
1College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
Foods (Basel, Switzerland)
|October 16, 2025
概括
这项研究引入了一种使用表面增强拉曼散射 (SERS) 和便携式拉曼光谱的快速方法,用于检测牛肉中的大肠杆菌等有害细菌. 这种技术提供了一个更快的,现场替代传统的食品安全测试.
科学领域:
- 食品安全 食品安全
- 分析化学是一种分析化学.
- 频谱学是一种光谱学.
背景情况:
- 肉类中的食源性致病细菌对公众健康构成重大风险.
- 传统的检测方法往往很慢,需要大量的实验室工作.
- 快速和便携式检测对于有效监测食品安全至关重要.
研究的目的:
- 开发和验证牛肉中常见的食源性病原体的快速检测方法.
- 使用表面增强的拉曼散射 (SERS) 与便携式拉曼光谱来提高灵敏度和速度.
- 为了确定检测极限和准确性,在肉样品中识别特定细菌.
主要方法:
- 使用银纳米粒子 (AgNPs) 作为基质的SERS的应用.
- 鉴定和分析了四种主要的致病细菌:大肠杆菌 (E. coli) O157:H7,沙门氏菌 (S. typhimurium),金黄色葡萄球菌 (S. aureus) 和单细胞菌 (L. monocytogenes).
- 优化AgNP检测条件和使用线性差异分析 (LDA) 来进行光谱数据分析.
主要成果:
- 在牛肉样本中检测到致病细菌的低检测极限 (LOD),范围为4-23 CFU/mL.
- 使用LDA.3,使用91.7%至97.3%的高检测准确度得到证明.
- 在纯培养和复杂的牛肉矩阵中成功识别和分析了目标细菌.
结论:
- SERS与便携式拉曼光谱学相结合,提供了一种快速,灵敏和方便的方法,用于检测牛肉中的致病细菌.
- 这种方法克服了传统方法的局限性,允许在现场进行潜在的食品安全监测.
- 建议进行进一步的研究,以扩大可检测的病原体的范围,并提高各种肉样品的模型稳定性.
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