Citation: TAO Chen, LI Chun-Sheng, WANG Hong-Xia, ZHANG Ya-Ru, ZHAO Cheng-Wei, ZHOU Zhi-Heng, MA Zhen-Yu, TIAN Di. Research on Dispersive Detection Technology Based on Digital Micromirror Device by Atomic Fluorescence Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(12): 1878-1885. doi: 10.11895/j.issn.0253-3820.181475 shu

Research on Dispersive Detection Technology Based on Digital Micromirror Device by Atomic Fluorescence Spectrometry

1.
College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130023, China;
2.
Beijing Bohui Innovation Optoelectronic Technology Co., Ltd, Beijing 102206, China;
3.
Grating Technology Laboratory, Changchun Institute of Optics and Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Received Date: 22 July 2018
Revised Date: 8 October 2018

Fund Project: This work was supported by the National Key Research and Development Program of China (No. 2016YFF0103303)

An ultraviolet (UV) digital micromirror spectrometer using a digital micromirror device (DMD) as a spatial light modulator, a grating as a spectroscope and a photomultiplier tube (PMT) as a detector, was specially designed for dispersive hydride generation atomic fluorescence spectrometry (HG-AFS). To improve detection ability of the spectrometer for weak fluorescence signals at 180-320 nm, a high UV transmittance DMD was used and the signal acquisition system was improved, the control parameters of DMD and PMT negative high voltage were optimized. The feasibility of the spectrometer was demonstrated with analyzing standard sample of As, Sb, Bi and Hg, the atomic emission and fluorescence spectra were obtained. The scattering interference caused by the light source was discussed. The results showed that the UV digital micromirror spectrometer had a preliminary ability for the excitation fluorescence analysis by HG-AFS. The UV digital micromirror spectrometer contained no moving parts, was simply structured, and speedy spectral analysis (0.848 s per spectrum scan).
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