基于不同原理的低浓度二氧化硫分析仪性能研究

乔支卫<sup>1; 2</sup>; 王安琪<sup>3</sup>; 张振欣<sup>2</sup>; 杨凯<sup>4</sup>

引用本文:	QIAO Zhi wei,，WANG An qi，ZHANG Zhen xin，YANG Kai.Study on the Performance of Low Concentration Sulfur Dioxide Analyzers Based on Different Principles[J].Environmental Monitoring and Forewarning,2017,9(6):29~32

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基于不同原理的低浓度二氧化硫分析仪性能研究
乔支卫，王安琪，张振欣，杨凯^1,2,3,4
1.江西师范大学化学化工学院，江西南昌 330022;2.江西省环境监测中心站，江西南昌 330077;3.上海大学环境与化学工程学院，上海 200444;4.中国环境监测总站，北京 100012

摘要:

为掌握非色散红外吸收光谱法（NDIR）、紫外差分吸收光谱法（DOAS）、非色散紫外吸收光谱法（NDUV）、红外激光吸收光谱法（OFCEAS）测定烟气中低浓度二氧化硫的差异，通过方法比对实验，对基于不同原理二氧化硫分析仪的响应时间、重复性、线性误差、干扰因素等进行研究。结果表明，不同原理的低浓度二氧化硫分析仪在响应时间、线性误差、重复性、漂移等基本性能上均能满足《HJ/T 76—2007》的要求，但不同原理之间性能指标差异也很明显。不同露点温度对基于NDIR和NDUV法的二氧化硫分析仪有正干扰，CO不干扰二氧化硫的测定，CH₄对基于NDIR和OFCEAS法的二氧化硫分析仪有正干扰，NH₃和HCl对基于DOAS法的二氧化硫分析仪有正干扰。

关键词: 二氧化硫非色散红外非色散紫外紫外差分红外激光

DOI：

分类号:X851

文献标识码:B

基金项目:

Study on the Performance of Low Concentration Sulfur Dioxide Analyzers Based on Different Principles

QIAO Zhiwei,，WANG Anqi，ZHANG Zhenxin，YANG Kai^1,2,3,4

1.College of Chemistry and Chemical Engineering, Jiangxi Normal University，Nanchang，Jiangxi 330022，China;2. Environmental Monitoring Centre of Jiangxi Province, Nanchang, Jiangxi 330077, China;3.School of Environment and Chemical Engineering, Shanghai University, Shanghai 200444, China;4.China National Environmental Monitoring Centre, Beijing 100012, China

Abstract:

In order to understand the difference between the different analyzers in the determination of low concentration sulfur dioxide in flue gas, which based on Non Dispersive Infra Red spectrometry (NDIR), Differential Optical Absorption spectroscopy (DOAS), Non Dispersive Ultra Violet spectrometry (NDUV) and Optical Feedback Cavity Enhanced Absorption Spectroscopy (OFCEAS), through the method of comparing experiment, we have conducted the study on the response time, repeatability, linearity error, interference factors of sulfur dioxide analyzers based on different principles. The results show that, the basic performance on the different principle of low concentration sulfur dioxide analyzer can meet the requirements of “HJ/T 76—2007”, such as the response time, linear error, repeatability, drift, etc. But there are obvious differences between the performance indicators on different principles. Different dew point temperature causes positive interference with NDIR and NDUV analyzer CO does not interfere with the determination of sulfur dioxide, CH₄ causes positive interference with NDIR and OFCEAS analyzer , NH₃ and HCl causes positive interference with DOAS analyzer.

Key words: SO₂ NDIR NDUV DOAS OFCEAS