A New Highly Sensitive Optical Sensor Based on Congo-Red for the Determination of Thorium(Ⅳ) in Aqueous Solution  

作　　者：Abdollah Yari Samaneh Penhani 

机构地区：[1]Faculty of Chemistry,Lorestan University,Khorramabad 68151-44316,Iran

出　　处：《Journal of Analysis and Testing》2023年第4期416-424,共9页分析检测（英文）

摘　　要：This essay explores the use of the sol-gel method based on the Congo-red reagent as an effective approach to create an optical sensor for the detection and tracking of Thorium(Ⅳ)(Th^(4+)).Upon exposure to a Th^(4+)-containing solution,the sensor exhibits significant absorption signal change that linearly correlates with Th^(4+)ion concentration across a wide range.It is capable of detecting Th^(4+)ion in the linear dynamic range of 1.7×10^(-8)to 1.1×10^(-3)mol/L,with a detection limit of 5.3×10^(-9)mol/L.This optode’s exceptional porous network,created through the sol-gel technique,contributes to its commendable performance,reliable repeatability,improved sensitivity,swift response time,and discerning selectivity.

关 键 词：Congo-red Optical sensor SOL-GEL Thorium(IV) 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] O657.3[自动化与计算机技术—控制科学与工程]