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Measurement of Absolute O2(1△) Concentration Using Improved Infrared Radiation-Calorimetry Method
Deng Liezheng, Shi Wenbo, Wang Xiangdan, Yang Heping, Qu Lishen, Sha Guohe*
State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023
Abstract:
The absolute O2 (1Δ)concentration measurement performed for a singlet oxygen generator(SOG)by using the infrared radiation-calorimetry method is reported with a detailed discussion of its principle and related technique. The influence of O2 (1Δ)gas temperature variation is considered and the corresponding correction has been made,which is neglected by the previous researchers and may cause a significant error in the case of measurement for the large O2 (1Δ)flowrate. Furthermore,an automatically balanced Wheatstone bridge circuit,which is necessary for O2 (1Δ)detection on the SOG of short operation period,is designed and tested by measuring the heat capacity of oxygen. The final error analyses give out a total relative error of ±16% for the O2 (1Δ)concentration,which mainly arises from the measurements of infrared radiation,pressure and temperature at the optical cell.
Key words:  Infrared radiation-calorimetry method,Singlet oxygen generator( SOG),Absolute concentration of singlet delta oxygen,Chemical oxygen-iodine laser(COIL)
FundProject:
改进的红外辐射-量热法测量O2(1△)绝对浓度
邓列征, 石文波, 王香丹, 杨何平, 曲利深, 沙国河*
中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连,116023
摘要:
对应用于单重态氧发生器(SOG) O2(1△)绝对浓度测量的红外辐射-量热法从理论和实验两方面进行了改进,修正了过去忽略O2(1△)温度变化所造成的系统误差.此外,还详细介绍了在短时间工作的SOG上进行O2(1△)绝对浓度测量所必须的自动平衡电桥装置,并通过氧气热容的测量检验了它的可靠性.最后的误差分析表明,O2(1△)绝对浓度的相对误差为±16%,误差主要来源于光度池红外信号、压力和温度的测量.
关键词:  红外辐射-量热法  单重态氧发生器(SOG)  单重态氧绝对浓度  氧碘化学激光(COIL)
DOI:10.1088/1674-0068/17/4/378-384
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