国产高精度温室气体分析仪性能评估  

Evaluation on the domestic invented high precision greenhouse gas analyzer

作　　者：卿雪梅 臧昆鹏 林溢 陈圆圆 邱珊珊 熊浩宇 李嘉鑫 蒋凯 洪海祥 方双喜 QING Xuemei;ZANG Kunpeng;LIN Yi;CHEN Yuanyuan;QIU Shanshan;XIONG Haoyu;LI Jiaxin;JIANG Kai;HONG Haixiang;FANG Shuangxi(Zhejiang University of Technology,Hangzhou,310014,China)

机构地区：[1]浙江工业大学环境学院,杭州310014

出　　处：《环境化学》2022年第12期4087-4096,共10页Environmental Chemistry

基　　金：国家重点研发计划(2020YFA0607500);自然资源部海洋-大气化学与全球变化重点实验室基金(GCMAC2001)资助.

摘　　要：在国家碳中和战略实施背景下,我国将大范围开展温室气体高精度监测,而目前国内温室气体高精度分析仪几乎完全依赖进口.本研究针对国产GGA-311型高精度温室气体分析仪开展综合性能评估研究.结果显示,该分析仪对CO_(2)和CH_(4)的分析精密度分别达0.15×10^(−6)(物质的量比)和1.2×10^(−9),达到WMO/GAW实验室间比对分析质控标准的扩展目标(CO_(2):±0.2×10^(−6);CH_(4):±4.0×10^(−9));其线性拟合相关系数(R^(2))分别为0.999993和0.99996.实验室和青海瓦里关全球大气本底站比对测试结果显示,该分析仪与进口Picarro G-2401型分析仪均能较好地捕捉本底CO_(2)和CH_(4)变化特征,但受水汽等因素影响,两套系统CO_(2)和CH_(4)偏差分别处于±0.2×10^(−6)和±4.0×10^(−9)范围内的数据占总数据的51.79%和79.76%,因此国产高精度温室气体分析仪在应用过程中,必须针对样气进行严格干燥,方能保证观测结果的可靠性.In the context of the implementation of the national carbon neutral strategy,China will build up high-density greenhouse gases monitoring network at a large scale,while the current domestic high-precision greenhouse gas analyzers were dependent on imports.In this study,a systematic test was carried out for the domestic invented GGA-311 greenhouse gas high-precision analyzer and its applicability was evaluated.The results showed that the precision of the analyzer for CO_(2) and CH_(4) reached 0.15×10^(−6)(molar ratio)and 1.2×10^(−9),respectively,meeting the extended goals of WMO/GAW laboratory comparability goals(CO_(2):±0.2×10^(−6);CH_(4):±4.0×10^(−9));The linear correlation coefficients(R^(2))were 0.999993 and 0.99996,respectively.Parallel observations at the laboratory and Waliguan atmospheric background station showed that GGA-311 analyzer and imported Picarro G-2401 can both well capture the characteristics of background CO_(2) and CH_(4) changes.However,due to the influence of factors such as water vapor,the deviations of CO_(2) and CH_(4) in the range of±0.2×10^(−6) and±4.0×10^(−9) for the two systems accounted for 51.79%and 79.76%of the total data,respectively.Therefore,the sample must be strictly dried to ensure the measurement quality when using the domestic invented GGA-311 greenhouse gas high-precision analyzer.

关 键 词：二氧化碳 甲烷 离轴积分腔输出光谱 波长扫描光腔衰荡光谱 观测 

分 类 号：X851[环境科学与工程—环境工程]