模块化的间接标签策略可以实现通用和经济高效的SERS免疫染色学,用于微量碳素检测
Junlin Chen1, Keli Wang1, Hong Lin1
1State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, China.
Food chemistry
|February 1, 2026
概括
一种新的模块化的间接标记表面增强拉曼散射免疫染色学 (SERS-ICA) 提供了快速而敏感的农药检测. 这种方法显著减少了抗体消耗,并为食品安全应用提供了准确的结果.
科学领域:
- 分析化学 分析化学
- 生物传感技术的技术
- 食品安全科学 食品安全科学
背景情况:
- 食品中的农药残留物对健康构成重大风险,需要先进的检测技术.
- 目前用于杀虫剂检测的方法往往缺乏所需的速度,灵敏度或成本效益.
- 开发新的分析平台对于确保全球食品安全标准至关重要.
研究的目的:
- 开发一个模块化的间接标签表面增强的拉曼散射免疫染色学 (SERS-ICA) 用于快速和敏感的农药检测.
- 解信号和识别模块以提高效率和降低试剂消耗.
- 验证SERS-ICA系统在各种食品矩阵中检测农药残留物的性能.
主要方法:
- 使用Au@Ag纳米颗粒预装DTNB并与山羊抗老鼠IgG结合制造通用信号探针.
- 针对特定目标的单克隆抗体与通用信号探针对接,用于模块化识别.
- 优化纳米粒子大小,银外厚度,记者加载和存储条件,以提高信号稳定性.
- 应用开发的SERS-ICA用于检测碳富兰作为模型分析剂.
主要成果:
- 在优化后,SERS-ICA系统表现出高信号稳定性.
- 对于carbofuran,可以达到0.0001-10 ng mL-1 (R2 = 0.985) 的线性检测范围.
- 获得了0.51 pg mL-1的高度敏感的检测极限.
- 该方法在添加的食品样本 (梨,胡卜,马) 中表现出极好的特异性,可重复性和强大的性能.
结论:
- 开发的模块化间接标签SERS-ICA是一种高度敏感和快速的农药残留检测方法.
- 这种方法显著降低了抗体消耗,并与直接标记方法相比简化了探针准备.
- 在确保食品安全和质量控制方面,SERS-ICA对实际应用非常有前途.
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