|
|
|
| Evaluation of the Uncertainties of Continuous Measurement for Methane in the Atmosphere |
| CUI Hu-xiong1,CHAI Wen-xuan2,WANG Ying3,FU Qing-yan1 |
1. Shanghai Environmental Monitoring Center, Shanghai 200235, China
2. China National Environmental Monitoring Centre, Beijing 100012, China
3. Shanghai Chemical Environmental Protection Monitoring Station, Shanghai 200050, China |
|
|
|
|
Abstract The global climate change caused by the increase of methane concentration in the atmosphere has become a hot spot in the world. In order to accurately study the variation of methane concentration in the atmosphere, it is extremely important to understand and master the uncertainty of methane measurement. On-line gas chromatography is used to measure methane in the atmosphere, the main sources of uncertainty in the measurement process are analyzed, and each uncertainty component is quantified and evaluated. The results show that the expanded uncertainty is 100nmol/mol(k=2, P=95%) when methane concentration is 2000nmol/mol. According to the analysis, it is found that the uncertainty of online measurement of methane in the atmosphere are mainly introduced by the dilution and preparation of standard gases and the fitting of standard curves
|
|
Received: 23 June 2021
Published: 22 August 2023
|
|
|
|
|
|
| ［1］ |
周杰,官莉. 青藏高原上空甲烷的时空分布特征及其夏季高值形成机制分析［J］.气候与环境研究,2017,22(3):315-321.
|
| ［6］ |
周凌晞,汤洁,温玉璞,等.瓦里关大气甲烷本底浓度变化特征的分析［J］.应用气象学报, 1998,9(4):385-390.
|
| ［11］ |
JJF 1135—2005 化学分析测量不确定度评定［S］.
|
| ［4］ |
GB/T 34287—2017 温室气体 甲烷测量 离轴积分腔输出光谱法［S］.
|
| ［10］ |
岳利娇.色谱法测定煤层气甲烷不确定度评定中的应用［J］. 煤炭与化工,2017,40(9):16-18.
|
| ［17］ |
曾吉鹏,潘登,管坚,等. 双氧法测量烟气再循环率及不确定度分析［J］.计量学报, 2022, 43(9): 1220-1225.
|
| ［5］ |
GB/T 31705—2015 气相色谱法本底大气二氧化碳和甲烷浓度在线观测方法［S］.
|
| ［7］ |
顾青峰,王跃思,刘广仁,等.北京城市大气甲烷自动连续观测与结果分析［J］. 环境污染治理技术与设备,2002,3(10):41-46.
|
| ［12］ |
JJF 1059.1—2012 测量不确定度评定与表示［S］.
|
| ［13］ |
张艳妮,舒木水,赵岩,等. 气相色谱法测定作业场所中苯系物的不确定度评定［J］. 计量学报,2010,31(5A):54-58.
|
| ［18］ |
张琳颖,贺石中,丘晖饶, 等.高效液相色谱法测定绝缘油中糠醛含量的不确定度评定［J］.计量学报, 2022, 43(4): 560-564.
|
|
Zhou J, Guan L. Characteristics of Spatial and Temporal Distributions of Methane over the Tibetan Plateau and Mechanism Analysis for High Methane Concentration in Summer［J］. Climatic and Environmental Research, 2017, 22(3):315-321.
|
|
Liu P, Zhang G Q, Wang J Q, et al. Temporal Variation of Background Atmospheric CO2 and CH4 at Mount Waliguan,China［J］. Environmental Science, 2014,35(9): 3256-3262.
|
|
Gu Q F, Wang Y S, Liu G R, et al. Auto-measurement and Analysis of Atmospheric Methane in Beijing［J］. Techniques and Equipment for Environmental Pollution Control,2002,3(10):41-46.
|
| ［8］ |
王景华,张志珍. 潍坊城区大气甲烷浓度变化特征［J］.中国环境管理干部学院学报,2017,27(2):60-63.
|
| ［9］ |
贺莉,冉毅,蒋鸿涛,等. 气相色谱法测定沼气中甲烷含量的不确定度计算［J］.中国沼气,2014,32(5):50-51.
|
|
Zhang Y N, Shu M S, Zhao Y, et al. Evaluation of Uncertainties of Gas Chromatographic Measurement for BTEX in Workplace［J］. Acta Metrologoca Sinica, 2010, 31(5A):54-58.
|
| ［16］ |
马振栋,王凤池,郝东升. 高效液相色谱柱后衍生法测定黄曲霉素的不确定度评定［J］. 计量学报,2002,23(3):229-240.
|
| ［20］ |
HJ 818—2018 环境空气气态污染物(SO2、NO2、O3、CO)连续自动监测系统运行和质控技术规范［S］.
|
|
Zhou L X, Tang J, Wen Y P, et al. Characteristics of Atmospheric Methane Concentration Variation at Mt.Waliguan［J］.Quarterly Journal of Applied Meteoro-logy,1998,9(4): 385-390.
|
|
Yue L J. Application of chromatography in the methane uncertainty evaluation of coalbed methane［J］.Coal and Chemical Industry, 2017,40(9):16-18.
|
| ［14］ |
Güzel B, Canli O. Method validation and measurement uncertainty of possible thirty volatile organic compounds (VOCs) presented in the polyethylene present in bottled drinking waters sold in Turkey［J］. Journal of Analytical Science & Technology, 2020, 11(1):44.
|
|
Zeng J P, Pan D,Guan J, et al. Measurement Method of Flue Gas Recirculation Rate and Uncertainty Analysis［J］.Acta Metrologica Sinica, 2022, 43(9): 1220-1225.
|
|
Zhang L Y, He S Z, Qiu H R, et al.Uncertainty Evaluation for the Furfural Content in Transformer Oil by HPLC［J］.Acta Metrologica Sinica, 2022, 43(4): 560-564.
|
| ［19］ |
吴雨彤,毕哲,杨扬仲夫, 等. 气体动态稀释装置的可靠性评价［J］. 计量学报, 2021,42(7): 956-963.
|
| ［2］ |
刘鹏,张国庆,王剑琼,等.瓦里关大气二氧化碳和甲烷时间变化特征［J］. 环境科学,2014,35(9):3256-3262.
|
| ［3］ |
GB/T 33672—2017 大气甲烷光腔衰荡光谱观测系统［S］.
|
|
Wang J H, Zhang Z Z. Variation Characteristics of Atmospheric Methane in Urban Area of Weifang［J］. Journal of Environmental Management College of China, 2017,27(2):60-63.
|
|
He L, Ran Y, Jiang H T, et al.Evaluation of the Uncertainty in Methane Content Determination with Gas Chromatography［J］. China Biogas, 2014, 32(5):50-51.
|
| ［15］ |
GB/T 35655—2017 化学分析方法验证确认和内部质量控制实施指南 色谱分析［S］.
|
|
Ma Z D, Wang F C, Hao D S. The Uncertainty Evaluation of Determination of Aflatoxin by HPLC Post-Column Derivation Method［J］. Acta Metrologica Sinica,2002, 23 (3): 229-240.
|
|
Wu Y T, Bi Z, Yang Y Z F, et al. Reliability Evaluation of Gas Dynamic Dilution Device ［J］. Acta Metrologica Sinica, 2021,42 (7): 956-963.
|
|
|
|
2023, Vol. 44 
