【摘要】 正在发展的差分吸收光谱测量方法可用来快速准确获得二氧化硫和氮氧化物等排放物质的吸收光谱信号,从而有可能有效排除干扰因素的影响,实现多组分排放在线监测。而作为光谱分析的前端,基于色散或迈克耳逊干涉的传统光谱测量技术难以满足现场在线应用的要求,在一定程度上限制了差分吸收光谱方法的应用水平。为了克服传统光谱测量技术的先天弱点,提出一种基于固态部件的高通量高灵敏度的紫外-可见傅里叶变换光谱测量方法,并通过3种不同激光器实验反演了单波长、双波长及三波长的谱线,与激光器的标称波长相吻合,从而验证了这一方法的可行性,为进一步改进和配合差分吸收光谱法实现在线排放监测打下基础。更多还原

【Abstract】 The Differential Optical Absorption Spectroscopy（DOAS） based analysis method in development may be used for instant acquisition of accurate absorption spectroscopy signals of the emission species such as SO₂ and NO_xand hence possesses the potentiality of application to in-line monitoring of multiple emission species with immunity to miscellaneous interference.However,as the front end of spectroscopic analysis,traditional spectrometry techniques based on dispersion or Michelson interferometry do not satisfy the requirements of in-situ & in-line applications.Aiming at the inherent limitation of these traditional techniques,this paper presents a static FTUV-VIS spectrometry technique with high throughput & sensitivity.The resultant spectral lines obtained from the experiment on three lasers coincide with the rated centre wavelengths and thus the feasibility of the technique is verified,preparing a foundation for further improvement and ultimate implementation of in-line emission monitoring with application of the DOAS-based analysis method.更多还原