Rapid Colorimetric Detection of Ca(II) Based on Surface Plasmon Resonance Absorbances of 5-PBA@AuNPs Sensor

IF 2.6 4区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY ChemNanoMat Pub Date : 2024-07-09 DOI:10.1002/cnma.202400305
Jingyi Ma, Guona Li, Xueqi Duan, Jin-Peng Xue, Xing Li, Yun Li
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Abstract

Calcium ions (Ca2+) are essential for a myriad of physiological functions, including excitability, neurotransmitter release, gene transcription, cell proliferation, synaptic plasticity, and hormone secretion. Consequently, the detection of Ca2+ concentrations in water is of fundamental and practical significance. In this study, a novel method for the simple, visual, and rapid colorimetric detection of Ca2+ is introduced, leveraging the surface plasmon resonance (SPR) absorbances of gold nanoparticles (AuNPs) modified with 5-Pyrimidinylboronic acid (5-PBA). A color change from wine-red to gray-blue was observed with increasing concentrations of Ca2+, indicative of the agglomeration of AuNPs. This agglomeration displayed favorable anti-interference properties and selectivity. The limits of detection (LOD) were determined to be 0.08 mM by the unaided eye and 3.29 μM by UV-visible spectroscopy. Moreover, an excellent linear relationship (R2=0.9879) was maintained within the Ca2+ concentration range of 0.0 to 0.5 mM. These results suggest that AuNPs modified with 5-PBA are suitable for the quantitative determination of Ca2+. Subsequent testing on actual samples confirmed that this new method could be effectively applied to the monitoring of Ca2+ in water.

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基于 5-PBA@AuNPs 传感器表面等离子共振吸光率的 Ca(II) 快速比色检测技术
钙离子(Ca2+)对多种生理功能至关重要,包括兴奋性、神经递质释放、基因转录、细胞增殖、突触可塑性和激素分泌。因此,检测水中的 Ca2+ 浓度具有重要的现实意义。本研究利用 5-嘧啶基硼酸(5-PBA)修饰的金纳米粒子(AuNPs)的表面等离子体共振(SPR)吸光度,介绍了一种简单、直观、快速的比色法检测 Ca2+。随着 Ca2+ 浓度的增加,观察到颜色从酒红色变为灰蓝色,这表明 AuNPs 发生了团聚。这种团聚显示出良好的抗干扰性能和选择性。检测限(LOD)经肉眼测定为 0.08 mM,经紫外可见光谱测定为 3.29 μM。此外,在 0.0 至 0.5 mM 的 Ca2+ 浓度范围内,保持了良好的线性关系(R2 = 0.9879)。这些结果表明,用 5-PBA 修饰的 AuNPs 适用于 Ca2+ 的定量测定。随后的实际样品测试证实,这种新方法可有效地用于监测水中的 Ca2+。
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来源期刊
ChemNanoMat
ChemNanoMat Energy-Energy Engineering and Power Technology
CiteScore
6.10
自引率
2.60%
发文量
236
期刊介绍: ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.
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