A fluorescence method of detecting sulfur dioxide derivatives

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Lv, H.M.^1 ; Wang, Z.Y.^1 ; Gao, N.^1

Shandong Provincial Key Laboratory of Marine Monitoring Instrument Equipment Technology, National Engineering and Technological Research Center of Marine Monitoring Equipment, Institute of Oceanographic Instrumentation, Qingdao

266061, China^1

关键词: Detection limits;    Fluorescence intensity ratio;    Fluorescence method;    Fluorescence spectrometry;    High selectivity;    Maximum emissions;    Nucleophilic additions;    Sensing mechanism;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012107/pdf
DOI  :  10.1088/1755-1315/191/1/012107

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A fluorescence spectrometry method is proposed to detect SO3 2-. The sensing mechanism is realized by utilizing the nucleophilic addition reaction between SO3 2- and α, β- unsaturated compounds, exhibiting remarkable blue-shift in the maximum emission wavelength (from 650 nm to 555 nm). Preliminary experiments are conducted and results show that the method exhibits high selectivity and sensitivity toward sulfite over other common anions. The fluorescence intensity ratio at 555 nm and 650 nm (I555/I650) has a good linearly with sulfite concentration ranging from 0.5 to 15 μ with a detection limit of 0.28 μ. These results provide theoretical fundamentals for sulfite detection in practical water samples.