长光路FTIR研究OH发生体系中的OH浓度  

The Study of OH Concentration in OH Generating Systems Using Long Path FTIR *

作　　者：任信荣[1] 刘兆荣[1] MatthiasOtting 邵可声[1] 唐孝炎[1] 

机构地区：[1]北京大学环境科学中心环境模拟与污染控制国家重点联合实验室大气环境模拟分室,北京100871

出　　处：《环境科学》1999年第6期26-29,共4页Environmental Science

基　　金：国家自然科学基金

摘　　要：利用长光路ＦＴＩＲ测定甲苯、三甲苯等芳香烃化合物在烟雾箱中光化学反应衰减，确定了ＮＯｘＨ２ＯＡｉｒ、ＨＯＮＯＨ２ＯＡｉｒ和ＣＨ３ＯＮＯＮＯＡｉｒ ３种体系在黑光灯照射下的ＯＨ 浓度，结果表明三者ＯＨ浓度范围分别为：～１０５～１０６、～１０７、～１０７～１０８ｍ ｏｌｅｃｕｌｅｓ·ｃｍ － ３，并进一步讨论了反应前体物对生成ＯＨThe concentration of hydroxyl radical in three different OH generating systems was measured from the decay of some aromatic hydrocarbons such as toluene and mesitylene using long path FTIR.These three systems were NO x H 2O Air,HONO H 2O Air and CH 3ONO NO Air,irradiated by four black lamps.Under the experimental conditions employed,the ranges of OH concentration were ～10 5 ～10 6,～10 7 and ～10 7～10 8molecules·cm -3 ,respectively.The factors influencing the concentration of the generated OH were discussed.

关 键 词：OH自由基 LP-FTIR 烟雾箱 测量 大气化学 

分 类 号：X515[环境科学与工程—环境工程]