The Application of Standard Gas Mixture of SO2 and NO in Ecological Environment Monitoring Inter-laboratory Comparison
WU Xiao-feng1,WANG De-fa2,WU hai2,LÜ Yi-bing1
1. State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring,China National Environmental Monitoring Center, Beijing 100012, China
2. National Institute of Metrology, Beijing 100029, China
Abstract：Referring to the reference materials development technology, a patch of cylinders of SO2 and NO standard gas mixture in nitrogen was prepared by gravimetric method, and verified for applicability.The application of the gas mixture in ecological environment monitoring was investigated by inter-laboratory comparison.The results showed that the standard gas mixture was suitable to carry out inter-laboratory comparison and a good application effect was obtained in practical ecological environment monitoring inter-laboratory comparison.The laboratory comparison results show that the proportion of laboratories with satisfactory evaluation results for SO2 and NO are 79.4% and 81.4%, respectively, indicating that the overall detection ability and technical level of SO2 and NO in China are good.
吴晓凤,王德发,吴海,吕怡兵. SO2和NO混合标准气体在生态环境监测实验室比对中的应用[J]. 计量学报, 2023, 44(5): 810-817.
WU Xiao-feng,WANG De-fa,WU hai,Lü Yi-bing. The Application of Standard Gas Mixture of SO2 and NO in Ecological Environment Monitoring Inter-laboratory Comparison. Acta Metrologica Sinica, 2023, 44(5): 810-817.
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2023, Vol. 44 
