Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7640548 | Microchemical Journal | 2018 | 7 Pages |
Abstract
Selenium was taken as an example to investigate the effect of variable ultraviolet (UV) wavelength and intensity on its photochemical vapor generation (photo-CVG) process. A broadband laser-driven light source (LDLS) and a UV lamp were utilized as irradiation sources for the photo-CVG of trace selenium which was sensitively detected by atomic fluorescence spectrometry (AFS). Five filters with bandpass at different wavelength (254â¯nm, 285â¯nm, 315â¯nm, 365â¯nm and 395â¯nm) were used to filtrate the light from the LDLS and the UV lamp. The signal change of Se(VI) by photo-CVG-AFS was monitored when a TiO2-coated quartz coil was irradiated by variable wavelength and intensity. The experimental results indicated: (1) the efficiency of Se(VI) photo-CVG varied with irradiation wavelength; (2) a synergistic effect existed for the photo-CVG, and the efficiency of the full spectrum was thus better or close to the sum of all wavelengths; and (3) the efficiency of Se(VI) photo-CVG was also affected by the UV intensity.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Zhirong Zou, Yunfei Tian, Wen Zeng, Xiandeng Hou, Xiaoming Jiang,