大气与环境光学学报2025，Vol.20Issue(4)：449-460,12.DOI:10.3969/j.issn.1673-6141.2025.04.003
N2O5腔衰荡光谱探测系统传输效率的标定方法研究
A calibration method for transfer efficiency of N2O5-cavity ring-down spectroscopy detection system
摘要
Abstract
Dinitrogen pentoxide(N2O5)is the most important active nitrogen species at night,and accurate detection of it is important for understanding chemical processes in the atmosphere at night.The high precision cavity based cavity ring down spectroscopy(CRDS)and cavity-enhanced absorption spectroscopy(CEAS)have become the most popular methods for N2O5 detection due to their high sensitivity and fast response time.However,N2O5 has the characteristics of high activity and easy loss,which affects the measurement accuracy of it.In order to ensure the accuracy of N2O5 measurement in the field by the N2O5-CRDS detection system,a set of device for on-line stable synthesis of N2O5 standard source was developed in this work,which can generate stable concentration of N2O5 by controlling the reaction of O3 and NO2,and then,the transmission efficiency of N2O5 gas in the N2O5-CRDS detection system was further studied.The transmission efficiency of N2O5 in perfluoroalkoxy alkane(PFA)sampling tube(length 3 m,outer diameter 6.35 mm),Teflon film holder(filter with 5 µm PTFE)and heated PFA tube(outer diameter 12.7 mm)were investigated,and finally the total transmission efficiency of N2O5 was obtained as 86.74%based on the system parameters used infield observation.The comparison results show that the transmission efficiency measured by this method is in good agreement with the calibration results of other works,which verifies the validity of this method.关键词
环境光学/五氧化二氮/腔衰荡光谱技术/传输效率Key words
environmental optics/nitrogen pentoxide/cavity ring-down spectroscopy/transfer efficiency分类
数理科学引用本文复制引用
杨欢,谢品华,胡仁志,林川,童金钊,陈亮,王瑞烁..N2O5腔衰荡光谱探测系统传输效率的标定方法研究[J].大气与环境光学学报,2025,20(4):449-460,12.基金项目
国家自然科学基金重点项目(42030609) （42030609）
