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在薄膜技术中通过扩散梯度在水中的化X射线对比介质的定量采样

Chenxi Yin¹, Xiaoyang Cai¹, Jia Dong²

¹College of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China. fanhongtao@lnpu.edu.cn.

Analytical methods : advancing methods and applications

|January 7, 2026

概括

一种新的以石墨烯为基础的薄膜扩散梯度 (G-DGT) 方法有效地监测污水中的六种有的X射线对比介质 (ICM). 该技术提供了对这些持续性环境污染物的精确,时间整合的测量.

科学领域:

环境化学环境化学
分析化学分析化学
水质监测水质监测

背景情况:

化X射线对比介质 (ICM) 是废水中的持久性,极性污染物.
现有的监测方法可能无法有效捕获时间整合度.

研究的目的:

开发和验证一种新的采样方法,用于在污水废水中进行时间集成的ICM监测.
评估开发方法在各种环境条件下的性能.

主要方法:

使用薄膜 (DGT) 的扩散梯度与石墨烯纳米板凝结合层 (G-DGT).
在合成和淡水样本中测试了6种ICM (iohexol,iopamidol,iomeprol,iopromide,iodixanol,ioversol) 的G-DGT性能.
对pH值,离子强度和自然有机物质的评估方法稳定性.

主要成果:

ICM的G-DGT吸收独立于pH (4-9),离子强度 (10−40.1 M) 和酸/酸 (020 mg L−1).
在淡水样本中精确确定六种ICM,通过良好的精度和G-DGT和溶液度之间的一致性得到证实.
与抓取样本相比,G-DGT显示了对ioversol和iopamidol的优越可重复性.

结论:

G-DGT是一个强大而有效的工具,用于复杂的污水废水中时间集成的ICM监测.
该方法可以准确评估来自临床实践的ICM.
这一进步支持在水生环境中更好地管理持久性制药污染物.

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