【摘要】 结合烟气分析仪,基于DOAS原理和最小二乘方法对污染物CH₂O进行光谱测量和浓度反演,实验结果表明,利用2m光程的气体室,测量结果精确,最大的相对误差在0.6%以内,测量结果波动小,且检测下限低至0.09ppm,精度为0.16ppm,能实现稳定在现场的CH₂O目标污染物物质的检测。更多还原

【Abstract】 Formaldehyde（HCHO）, as a common industrial substance, is widely used in the manufacture of thermosetting urea aldehyde, phenolic aldehyde and melamino-formaldehyde resins, adhesives, organic synthesis, synthetic materials, coating materials, rubber, explosives, medicine, pesticides and other industries[1-3]. However, formaldehyde has explosive, flammable, toxic, corrosive characteristics. The industrial processes, pollutant monitoring processes and formaldehyde measurement seem very important. In combination with the flue gas analyzer independently developed by the company, and based on DOAS principle and least two involution methods, the paper carries out the spectral measurement and concentration inversion of pollutant CH₂O. The experimental results show that the paper uses the gas chamber with 2 M optical path to measure the accurate result, The maximum relative deviation is in 0.6% with the little fluctuation of the measurement results and the detection limit is as low as 0.09 ppm, and the accuracy is 0.16 ppm. Thus, the paper can realize the stability of CH₂O target pollutants detection on the spot.更多还原