开发一种高性能光学传感器,用于在制药,食品,生物和环境样本中敏感检测离子
Nader Hassan1, Salah El-Bahy2, Ahmed O Babalghith3
1Chemistry Department, Faculty of Science, Port Said University, Port Said, Egypt.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|October 31, 2024
概括
一种基于酸盐的新型光学传感器可以检测酸性溶液中的离子 (CO2+). 这种可重复使用的薄膜在各种样本类型中提供了灵敏而稳定的检测.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 基于酸盐的材料因其生物相容性和薄膜形成特性而被广泛用于传感应用.
- 准确检测离子 (CO2+) 在环境监测和生物样本分析中至关重要.
- 开发敏感和选择性化学传感器仍然是分析化学的一个关键挑战.
研究的目的:
- 开发一种可再生的光学化学传感膜,用于检测离子 (Co2+).
- 为了将特定的染色原体4-(thiazol-2-yldiazenyl) -1,3-diol (TDBD) 固定在修改后的基托薄膜上.
- 评估传感器在灵敏度,选择性,稳定性和适用于真实世界样本方面的性能.
主要方法:
- 制备了一种修改后的奇托薄膜,并将其与固定的4- ((thiazol-2-yldiazenyl) -1,3-diol (TDBD) 结合起来.
- 在暴露于酸性水溶液中的CO2+后,研究了膜的光学特性,并监测了574nm的颜色变化.
- 为不同的样本体积 (2.5毫升和250毫升) 生成校准曲线,以确定CO2+度范围和检测极限.
- 传感膜的稳定性在30天内进行了评估,其性能与诱导合等离子体原子发射光谱法 (ICP-AES) 方法进行了验证.
主要成果:
- 传感膜在与CO2+复杂化后,呈现出明显的颜色变化,从黄色绿色到红色.
- 在pH值5.0下观察到对离子的最佳反应.
- 在8.0-140 ng/mL (2.5 mL样本) 和2.4-15.2 ng/mL (250 mL样本) 范围内,实现了对CO2+检测的线性校准曲线.
- 对于各自的样本体积,可以达到2.5 ng/mL和0.7 ng/mL的低检测极限.
- 传感器在30天内表现出良好的稳定性和高精度 (RSD<1.35%).
结论:
- 开发的素-TDBD传感膜是一种稳定,可再生和有效的光学传感器,用于在酸性介质中检测CO2+.
- 该传感器在各种矩阵中提供敏感且准确的离子量化,包括制药,食品,环境和生物样本.
- 这种方法提供了一种可行的替代方法,用于确定离子的传统分析技术.
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