可调谐激光吸收光谱法与气相色谱法监测甲烷的对比研究  

Comparison of CH_4 determined by tunable diode laser absorption spectroscopy and gas chromatograph

作　　者：王敏[1] 张玉钧[2] 

机构地区：[1]安徽建筑工业学院,合肥230022 [2]中国科学院安徽光学精密机械研究所环境光学与技术重点实验室,合肥230031

出　　处：《光学技术》2011年第2期241-244,共4页Optical Technique

基　　金：国家自然科学基金重点项目资助课题(50534050)

摘　　要：甲烷是一种重要的温室气体,它对大气中温室效应的贡献仅次于二氧化碳。针对环境空气中甲烷的测定,从测量原理、测量过程和测量装置等方面比较了可调谐二极管激光吸收光谱和气相色谱法两种测量方法。结果表明用上述两种方法测得的甲烷的日变化趋势具有良好的一致性。相比较而言,后者造价更低,并且更方便。Methane is the second important greenhouse gas,after carbon dioxide.Its concentration is of particular importance for radiative process and climate trends.Two measurement techniques are compared in the study.One is the tunable diode laser absorption spectroscopy and the other is Gas Chromatograph.The principles,measuring process and experiment system are described.Results show that the daily variation trend of CH4 derived from the two techniques are in good agreement and also indicated that the technique of tunable diode laser absorption spectroscopy is cheaper in cost and more convenient.

关 键 词：可调谐激光吸收光谱 气相色谱法 CH4 

分 类 号：O433.1[机械工程—光学工程]