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使用水凝隔离的双碳酸表面增强的拉曼散射探针进行准确的在线pH监测

Yan Chen^1,2, Zhiyang Zhang^1,3, Yanzhou Wu¹

¹Coastal Zone Ecological Environment Monitoring Technology and Equipment Shandong Engineering Research Center, Shandong Key Laboratory of Coastal Environmental Processes, CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.

|November 4, 2025

概括

一个新的表面增强的拉曼散射 (SERS) pH传感器使用2,5-二极管甲酸 (2,5-DMTA) 提供了更好的准确性和稳定性来检测酸性条件,优于传统探针.

科学领域:

分析化学分析化学
材料科学材料科学材料科学
环境科学环境科学

背景情况:

表面增强拉曼散射 (SERS) 被广泛用于pH传感.
传统的4-酸 (4-MBA) 探针具有局限性,包括小的光谱变化和易受干扰的影响,导致不准确的测量.

研究的目的:

开发一种新型的SERS pH传感器,以提高准确性和稳定性.
克服现有的4-MBA探针的局限性,用于基于SERS的pH检测.

主要方法:

作为SERS探针,使用了带有双基组的2,5-二元基甲酸 (2,5-DMTA).
开发了一个AuNP@hydrogel基质,以抑制复杂矩阵中的干扰.
将传感器与微流体3D打印的流量电池集成,用于在线监控.

主要成果:

2,5-DMTA传感器在酸性pH (0-7) 中表现出明显的,可重现的光谱反应,具有良好的线性 (R2 = 0.9786).
与4-MBA传感器 (RSD ≈ 20%) 相比,实现了显著更高的检测精度 (RSD < 5%).
证明了良好的可逆性 (≥6个周期),稳定性 (连续30分钟,储存30天) 和快速反应 (~120秒).

结论:

基于2,5-DMTA的SERS平台为酸性和复杂环境中的pH检测提供了强大而准确的解决方案.
AuNP@水凝基板通过最小化干扰来提高测量可靠性.
开发的系统适用于在线连续的pH监测,在现实应用中,如湖水测试.

关键词:

2,5-二元二甲二甲酸二甲二甲二甲二甲二甲二甲二甲二甲二甲二甲二甲高精度的高精度的高精度.这是一种水凝.微流体装置是一种微流体装置.在线pH检测pH检测表面增强的拉曼散射作用

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