制作新型钯膜传感器以测定环境和生物样品中的钯含量

IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL
Adil O. S. Bahathiq, Ahmad O. Babalghith, Alaa S. Amin and Abdelrazek M. Askar
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引用次数: 0

摘要

通过在琼脂糖膜上浸渍 4-(2-氨基-3-羟基吡啶-4-偶氮)1,5-二甲基-2-苯基-1,2-二氢吡唑-3-酮(AHDDO),制备了一种新型灵敏、特异和可逆的钯(II)离子光学传感器。分光光度法研究了 AHDDO 碱配体与 Mn2+、Cd2+、Co2+、Hg2+、Zn2+、Cu2+、Pd2+、Sr2+、Al3+、Fe3+、Au3+ 和 Ag+ 金属离子在乙醇溶液中形成的络合物,结果表明钯离子络合物具有更高的稳定性。因此,AHDDO 被固定在透明的琼脂糖薄膜上,并被用作构建选择性 Pd2+ 光学传感器的合适离子载体。在 pH 值为 5.75 时,将传感膜与 Pd2+ 离子结合,可观察到明显的橙色到紫色的颜色变化。研究了离子源浓度、pH 值、温度、搅拌和反应时间对固定 AHDDO 的影响。在 15-225 ng mL-1 的范围内,膜在 633 nm 处的吸光度与 Pd2+ 浓度之间呈线性关系,检测限(3σ)和定量限(10σ)分别为 4.25 和 14.25 ng mL-1。在测定 Pd2+ 离子时,没有发现浓度为 400 倍的多种可能的干扰离子的明显干扰。该传感器已成功用于生物、土壤、道路和水样中钯的检测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Fabrication of a novel palladium membrane sensor for its determination in environmental and biological samples

Fabrication of a novel palladium membrane sensor for its determination in environmental and biological samples

A novel sensitive, specific, and reversible optical sensor for the palladium(II) ion was created by impregnating an agarose membrane with 4-(2-amino-3-hydroxypyridine-4-ylazo)1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one (AHDDO). Spectrophotometric studies of complex formation between the AHDDO base ligand and Mn2+, Cd2+, Co2+ Hg2+, Zn2+, Cu2+, Pd2+, Sr2+, Al3+, Fe3+, Au3+, and Ag+ metal ions in an ethanolic solution indicated a substantially larger stability for the palladium ion complex. Therefore, the AHDDO was immobilized on a clear agarose film and used as a suitable ionophore for building a selective Pd2+ optical sensor. By combining the sensing membrane with Pd2+ ions at pH 5.75, a transparent color change from orange to violet was observed. On the immobilization of AHDDO, the effects of ionophore concentration, pH, temperature, stirring, and reaction time were investigated. A linear relationship was observed between the membrane absorbance at 633 nm and Pd2+ concentrations in a range from 15 to 225 ng mL−1 with detection (3σ) and quantification (10σ) limits of 4.25 and 14.25 ng mL−1, respectively. For the determination of Pd2+ ions, no significant interference from at least 400-fold excess concentrations of a number of possibly interfering ions was found. The sensor exhibits remarkable selectivity for Pd2+ ions and can be regenerated through exposure to 0.15 M HNO3. The sensor has been successfully used to find palladium in biological, soil, road, and water samples.

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