Herget W F, Jahnke J A, Burch D E, Gryvnak D A
Appl Opt. 1976 May 1;15(5):1222-8. doi: 10.1364/AO.15.001222.
An ir analyzer employing gas-filter correlation techniques has been designed and constructed to measure the concentrations of CO, NO, SO(2), HCl, and HF in the stacks or ducts of stationary pollutant sources. Use of a retroreflector allows the stack to be double passed, and no sample is extracted. For each gas, small interchangeable fixed-position grating polychromators are used as narrow (~1.5-cm(-1)) multiband spectral filters with the bands corresponding to locations of selected absorption lines. The approximate useful ranges (in parts per million-meters) over which this analyzer operates are 10-4000 for NO, 10-1500 for CO, 50-40,000 for SO(2), 10-2000 for HC1, and 5-200 for HF. The discrimination against other gases and particulates is excellent. The analyzer has been tested in the laboratory and on a variety of pollutant sources.
一种采用气体滤波相关技术的红外分析仪已被设计并制造出来，用于测量固定污染源的烟囱或管道中一氧化碳、一氧化氮、二氧化硫、氯化氢和氟化氢的浓度。使用后向反射镜可使光束在烟囱中两次通过，且无需抽取样品。对于每种气体，小型可互换的固定位置光栅多色仪用作窄带（约1.5厘米⁻¹）多波段光谱滤光片，其波段对应于选定吸收线的位置。该分析仪的近似有效范围（以百万分之一米为单位）为：一氧化氮10 - 4000，一氧化碳10 - 1500，二氧化硫50 - 40000，氯化氢10 - 2000，氟化氢5 - 200。对其他气体和颗粒物的鉴别能力极佳。该分析仪已在实验室和各种污染源上进行了测试。
