A miniaturized UV-LED photochemical vapor generator for atomic fluorescence spectrometric determination of trace selenium

作者：Zou, Zhirong; Xu, Fujian; Tian, Yunfei; Jiang, Xiaoming^*; Hou, Xiandeng^*

来源：Journal of Analytical Atomic Spectrometry, 2018, 33(7): 1217-1223.

DOI：10.1039/c8ja00052b

• METAL-ORGANIC FRAMEWORKS
• LIGHT-EMITTING-DIODES
• HYDRIDE GENERATION
• ABSORPTION-SPECTROMETRY
• EMISSION-SPECTROMETRY
• SAMPLE INTRODUCTION
• ICP-MS
• SPECIATION
• REDUCTION
• PRECONCENTRATION

A miniaturized UV-LED photochemical reactor is proposed for selenium photochemical vapor generation (Photo-CVG). The miniaturized Photo-CVG reactor with a coin size mainly consists of an ultraviolet light-emitting-diode (UV-LED) and a quartz coil with nano-TiO2 coating on its inner wall. It was coupled with an atomic fluorescence spectrometer (AFS) as a sample introduction device for trace selenium determination. The nano-TiO2 coating process, UV-LED wavelength and correlative experimental parameters as well as potential interference were investigated in detail. Under optimized experimental conditions, limits of detection of 0.21 and 0.28 g L-1 for Se(vi) and Se(iv) were obtained, respectively, with a relative standard deviation (n = 3) of 2.5% and 1.0% at 20 g L-1. The potential application of this UV-LED Photo-CVG AFS was demonstrated by successfully analyzing a certified reference water sample and several mineral water samples.

• 出版日期2018-7
• 单位四川大学