Study on Signal Enhancement Technology for Atomic Fluorescence Spectrometry Based on Digital Micromirror Device

doi:10.19756/j.issn.0253-3820.210467

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	Study on Signal Enhancement Technology for Atomic Fluorescence Spectrometry Based on Digital Micromirror Device
	H. X. Wang; Y. C. Li; C. S. Li; Z. H. Zhou; Z. Y. Ma and D. Tian
刊名	Chinese Journal of Analytical Chemistry
	2021
卷号	49 期号:9
ISSN号	0253-3820
DOI	10.19756/j.issn.0253-3820.210467
英文摘要	A dispersive detection system based on ultraviolet digital micromirror device (DMD) was used for hydride generation atomic fluorescence spectrometer (HG-AFS) on the basis of the original non-dispersion detection system. The dispersion system was used to suppress the interference when spectral interference from the light source or scattering interference exists. The limit of detection (LOD) of the dispersive system was worse than the non-dispersive one due to the addition of the dispersive components (DMD and grating , etc) . In this work , to improve the analytical performance of the dispersive detection method , a cylindrical mirror was installed in front of the photomultiplier tube (PMT) , the minimum effective area of the PMT was expanded to enhance the signal intensity, a better fixed location mode of DMD rotation was proposed, and the analysis methods such as peak selection and the instrument parameters affecting the signal intensity were optimized. The results showed that the signal intensity within 180-320 nm was increased more than 2 times , and the spectral resolution was increased more than 1.2 times. Moreover, the emission lines and excitation fluorescence lines of Cd, Te, Sn and Zn were obtained, and the LODs were respectively less than 0. 005 ng/mL for Cd, 0. 02 ng/mL for Sn, 0. 1 ng/mL for As, Bi and Hg, 0. 05 ng/mL for Sb , Pb and Te, and 0. 2 ng/mL for Se and Zn. The spiked recoveries and the RSDs of As were 93% - 101% and 0. 6% - 3. 3% in living and drinking water samples , and 95% - 106% and 0. 9% - 3. 4% in food samples , respectively. The LOD and resolution of the dispersive system were effectively improved because of the improvement of the ultraviolet DMD spectrometer, the upgrade of the DMD rotation detection mode and the optimization of the analysis method. As a result, the dispersive system met the detection requirements of toxicological index limits in the Standards 14 Drinking Water Quality (GB 5749-2006) , and also had good accuracy, sensitivity and stability in actual food sample analysis.
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内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/65664]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H. X. Wang,Y. C. Li,C. S. Li,et al. Study on Signal Enhancement Technology for Atomic Fluorescence Spectrometry Based on Digital Micromirror Device[J]. Chinese Journal of Analytical Chemistry,2021,49(9).
APA	H. X. Wang,Y. C. Li,C. S. Li,Z. H. Zhou,&Z. Y. Ma and D. Tian.(2021).Study on Signal Enhancement Technology for Atomic Fluorescence Spectrometry Based on Digital Micromirror Device.Chinese Journal of Analytical Chemistry,49(9).
MLA	H. X. Wang,et al."Study on Signal Enhancement Technology for Atomic Fluorescence Spectrometry Based on Digital Micromirror Device".Chinese Journal of Analytical Chemistry 49.9(2021).