紫外吸收光谱法在线测量SO<sub>3</sub>的实验研究

doi:10.3969/j.issn.1000-1158.2021.08.15

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Abstract The on-line measurement of SO₃ is studied based on ultraviolet absorption spectroscopy, and SO3 gas generation system is built. In order to improve the detection accuracy, various interference factors in the measurement process are removed. The characteristic absorption bands of SO₃ and SO₂ overlap seriously, and the influence of SO₂ on SO₃ measurement can be removed to the greatest extent through reasonable selection of characteristic absorption bands and spectral inversion strategy. In the study, the standard curve method combined with single wavelength method, dual wavelength method and integral spectrum method is used to establish the standard curve. The results show that the measurement error of the integrated spectrum method is the smallest, and it can be preferentially applied to the on-line spectrometric analysis of SO₃ emission.

Key words： metrology SO₃ volume fraction on-line measurement ultraviolet absorption spectroscopy dual-wavelength method integral spectral method

Received: 27 December 2019 Published: 20 August 2021

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TB99

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	Articles by authors
	ZHENG Hai-ming
	ZHU Xiao-peng
	WANG Jin-xiu
	JIA Gui-hong

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ZHENG Hai-ming,ZHU Xiao-peng,WANG Jin-xiu, et al. Experimental Study on On-line Measurement of SO₃ by Ultraviolet Absorption Spectroscopy[J]. Acta Metrologica Sinica, 2021, 42(8): 1076-1080.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.08.15 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I8/1076

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