Microfluidic-Based Separation and In-Situ Detection of Selenium( Ⅳ) Ion in Radioactive Wastes

摘要

Extraction and detection of selenium (Ⅳ) [Se(Ⅳ)] ionin a microfluidic channel were investigated using 2,3-diaminonapthalene ligand and fluorescence microscope. Adouble Y-chip with aqueous/organic two-phase parallelflow regimes was used for on-line extraction, and Se(IV)concentration profiles in organic phase were evaluated byscanning the fluorescence microscope along the microflowdirection. The results indicated that the Se(IV)microextraction of 64 % and 37% for single and multielementsolutions was achieved, respectively, in less than 4seconds, 20 times faster than bulk extraction.