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首页> 外文会议>The proceedings of AD 2007: Process control amp; compliance: analytical solutions >AN ULTRA-SENSITIVE, MULTI-SPECIES TRACE GAS ANALYZER FOR PROCESS ANALYSIS
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AN ULTRA-SENSITIVE, MULTI-SPECIES TRACE GAS ANALYZER FOR PROCESS ANALYSIS

机译：用于过程分析的超灵敏多物种痕量气体分析仪

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The need for multi-species, trace gas analysis in industries ranging from petrochemical process control to combustion analysis to environmental monitoring is driving the development of process analyzers with both high sensitivity and high speed. Cavity Ring-Down Spectroscopy (CRDS) is a laser-based, all-optical technique capable of parts-per-billion sensitivity and fast 1 Hz measurement rates. It is effective in even the most complex gas streams, without long term drift or periodic calibration requirements. A high finesse optical cavity coupled to a high precision wavelength monitor enable the CRDS analyzer to have a spectral resolution 1000 times better than a Fourier Transform Infrared Spectrometer (FTIR) thus allowing CRDS to distinguish individual absorption features. Picarro, Inc. has developed a CRDS gas analyzer that can measure up to four separate species. This multi-component analyzer gives the same performance, inherent stability, and reliability as the standard single-species gas analyzers. The modular broadband design enables configuration of the multi-species platform to any four of a variety of target species. Results obtained with measuring four important atmospheric contaminants (hydrogen sulfide, ammonia, nitrous oxide, and methane) that are of interest to researchers monitoring Concentrated Animal Feeding Operations (CAFOs) is shown. This work was supported by the U.S. Department of Energy under Contract No. DE-FG02-03ER83751 and the USDA under Award No. 2006-33610-16835.
机译：从石化过程控制到燃烧分析再到环境监测的行业中，对多种物种，痕量气体分析的需求正推动着高灵敏度和高速度的过程分析仪的发展。腔衰荡光谱仪（CRDS）是一种基于激光的全光学技术，具有十亿分之几的灵敏度和1 Hz的快速测量速率。即使在最复杂的气流中，它也很有效，无需长期漂移或定期校准。高精细的光学腔与高精度波长监控器相结合，使CRDS分析仪的光谱分辨率比傅立叶变换红外光谱仪（FTIR）高1000倍，从而使CRDS能够区分出各个吸收特征。 Picarro，Inc.开发了一种CRDS气体分析仪，它可以测量多达四个单独的物种。这种多组分分析仪具有与标准单种气体分析仪相同的性能，固有的稳定性和可靠性。模块化宽带设计可将多物种平台配置为多种目标物种中的任意四种。显示了通过测量四种重要的大气污染物（硫化氢，氨，一氧化二氮和甲烷）获得的结果，这是监视集中动物饲养操作（CAFO）的研究人员感兴趣的。这项工作得到了美国能源部根据合同号DE-FG02-03ER83751和美国农业部的支持，授予号为2006-33610-16835。

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