化学
检出限
分析化学(期刊)
二氯甲烷
光致发光
萃取(化学)
发光
热重分析
标准物质
分析物
色谱法
有机化学
光电子学
光学
物理
溶剂
作者
Juliana da S. Padilha,Marcelo Folhadella M. F. Azevedo,Jarol R. Miranda-Andrades,Anna De Falco,Kai Jiang,Ricardo Q. Aucélio
出处
期刊:Talanta
[Elsevier]
日期:2022-07-01
卷期号:244: 123406-123406
被引量:3
标识
DOI:10.1016/j.talanta.2022.123406
摘要
An Eu(III) β-diketonate complex was produced and employed as a photoluminescent probe to determine methylmercury (CH3Hg+). To establish its molecular structure, the Eu(III) complex was characterized by elemental (CHNS) and thermogravimetric analyses and infrared spectroscopy. After establishing robust conditions to use the Eu(III) complex as an analytical probe, it was employed for the analysis of produced water (PW) samples with the analytical response based on the luminescence suppression proportional to the concentration of CH3Hg+ (a linear model after normalization of the response within the concentration range from 0.2 μg L-1 up to 2.0 μg L-1). Selectivity was guaranteed by a simple liquid-liquid extraction of the analyte in dichloromethane, which also allowed a 50 times pre-concentration factor. The instrumental limit of quantification of 0.2 μg L-1 is equal to the limit established in Brazilian resolution for total mercury content in waters, but pre-concentration (50 times factor) improved the overall method limit of quantification down to 4 ng L-1. Recovery results agreed with the ones achieved using cold vapor atomic absorption spectrometry.
科研通智能强力驱动
Strongly Powered by AbleSci AI