N2O5腔衰荡光谱探测系统传输效率的标定方法研究

doi:10.3969/j.issn.1673-6141.2025.04.003

大气与环境光学学报 ›› 2025, Vol. 20 ›› Issue (4): 449-460.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

杨欢 1, 谢品华 1,2,3, 胡仁志 2*, 林川 2, 童金钊 3, 陈亮 3, 王瑞烁 2

1 中国科学技术大学工程科学学院, 安徽合肥 230027; 2 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院环境光学与技术重点实验室, 安徽合肥 230031; 3 中国科学技术大学环境科学与光电技术学院, 安徽合肥 230026

收稿日期:2023-05-19 修回日期:2023-06-08 出版日期:2025-07-28 发布日期:2025-07-25
通讯作者: E-mail: rzhu@aiofm.ac.cn E-mail:rzhu@aiofm.ac.cn
作者简介:杨欢 (1996- ), 安徽宿州人, 硕士研究生, 主要从事精密环境监测仪器设计方面的研究。E-mail: hyang@aiofm.ac.cn
基金资助:
国家自然科学基金重点项目 (42030609)

A calibration method for transfer efficiency of N2O5-cavity ring-down spectroscopy detection system

YANG Huan 1, XIE Pinhua 1,2,3, HU Renzhi 2*, LIN Chuan 2, TONG Jinzhao 3, CHEN Liang 3, WANG Ruishuo 2

1 School of Engineering Science, University of Science and Technology of China, Hefei 230027, China; 2 Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 3 School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China

Received:2023-05-19 Revised:2023-06-08 Online:2025-07-28 Published:2025-07-25

摘要/Abstract

摘要： 五氧化二氮 (N2O5) 是夜间最重要的活性氮物种，对它的准确探测对于认识夜间大气化学过程具有重要意义。基于高精密腔的腔衰荡光谱探测技术 (CRDS) 和腔增强光谱探测技术 (CEAS) 由于其测量灵敏度高、时间响应快等特点，已成为最为常用的N2O5探测方法。然而， N2O5具有活性高、易损耗的特性，在采样过程易发生碰撞而损耗，从而影响测量准确性。为了确保N2O5-CRDS探测系统在外场N2O5测量的准确性，本文研制了一套在线稳定合成N2O5标准源的装置，通过控制O3与NO2反应产生稳定浓度的N2O5，并在此基础上，进一步开展了N2O5气体在N2O5-CRDS探测系统的传输效率研究。实验分别探究了PFA (Perfluoroalkoxy alkane) 采样管 (长度3 m，外径6.35 mm)、Teflon 膜托［装有5 μm 聚四氟乙烯 (PTFE) 的滤膜］和加热的PFA管 (外径12.7 mm) 中N2O5的传输效率，进而结合外场观测时的系统参数，最终得到总的N2O5传输效率为86.74%。对比结果表明，使用本方法测量的传输效率与其他小组的标定结果具有较好的一致性，验证了本标定方法的有效性。

关键词: 环境光学, 五氧化二氮, 腔衰荡光谱技术, 传输效率

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.

Key words: environmental optics, nitrogen pentoxide, cavity ring-down spectroscopy, transfer efficiency

中图分类号:

O433.4

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.

YANG Huan , XIE Pinhua , HU Renzhi , LIN Chuan , TONG Jinzhao , CHEN Liang , WANG Ruishuo . A calibration method for transfer efficiency of N2O5-cavity ring-down spectroscopy detection system[J]. Journal of Atmospheric and Environmental Optics, 2025, 20(4): 449-460.

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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

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