通过具有过氧化酶类活性的酸模仿酶来确定蒂拉姆
Yunling Shao1, Miao Wang1, Jianpeng Zhang2
1Institute of Quality Standardization & Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, 100081 Beijing, China; State Key Laboratory for Quality and Safety of Agro-Products, 100081 Beijing, China.
Food chemistry
|January 17, 2026
概括
一种新型的-铜模拟酶通过抑制类似过氧化酶的活性,使得提拉姆能够快速检测. 这种具有成本效益的方法提供了敏感的农药监测,在真实样本中具有高回收率.
科学领域:
- 生物化学 生物化学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 蒂拉姆是一种广泛使用的杀菌剂,具有环境和健康风险.
- 敏捷和快速的探测方法对于thiram对于监测和安全至关重要.
- 现有的检测方法可能缺乏成本效益或速度.
研究的目的:
- 开发一种-铜 (-Cu) 仿真酶,用于敏感的提拉姆检测.
- 为了研究蒂拉姆对仿真酶的抑制机制.
- 评估开发的方法在真实样本中检测胺的性能.
主要方法:
- 构建具有过氧化酶类活性的铜模仿酶.
- 使用o-phenylenediamine (OPD) 作为染色基质.
- 采用分子动力学 (MD) 模拟和密度函数理论 (DFT) 来阐明机制.
- 评估蒂拉姆检测线性,检测极限 (LOD) 和恢复率.
主要成果:
- 基仿真酶在H2O2的存在下有效催化了OPD氧化.
- 蒂拉姆通过阻断表面和破坏结构/电子性质来抑制酶的催化活性.
- 蒂拉姆检测显示出良好的线性 (0.015μg/mL),LOD为0.048μg/mL.
- 在真实样本中实现了高恢复率 (79.71%108.13%).
结论:
- 基仿真酶提供了一个敏感和快速的平台,用于提拉姆检测.
- 通过MD模拟和DFT计算,揭示了西拉姆的抑制机制.
- 这种基于金属复合物的方法为农药监测提供了简单,经济实惠和有效的解决方案.
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