基于碳量子点的ECL法检测二氧化硫

Detection of SO2 by ECL Method based on Carbon Quantum Dots

二氧化硫作为大气污染物,对人类生活环境存在大范围、长期的慢性危害。本文发现亚硫酸钠同碳量子点作用,在亚硫酸钠的一定浓度范围会使碳量子点发光强度发生增强,且发光强度的变化与亚硫酸根离子浓度形成良好的线性关系。据此开发出一种电致化学发光分析方法,用于大气中二氧化硫的含量检测,检出限为2.78 ppm,线性范围为2.78~1000 ppm。

Sulfur dioxide is a kind of air pollutant with large-scale and long-term chronic harm to human living environment. It is found that sodium sulfite can enhance the luminous intensity of CQDs within a certain concentration range, and the enhancement of luminous intensity has a good linear relationship with the concentration of sulfite. Based on this, an electrochemiluminescence analysis method is developed for the detection of sulfur dioxide in the atmosphere. The detection limit is 2.78 ppm and the linear range is 2.78~1000 ppm.