氮气中二氧化氮气体标准物质的制备

Preparation of Nitrogen Dioxide Gas Reference Material in Nitrogen

主要介绍了氮气中二氧化氮气体标准物质的研制过程,参照GB/T 5274.1-2018《气体分析校准用混合气体的制备第1部分:称量法制备一级混合气体》称量法制备并定值,通过控制原料气检测、称量过程、制备过程,以及均匀性、稳定性的不确定度达到了研制要求,考察期为1 a。

This paper mainly introduces the development process of nitrogen dioxide gas reference materials in nitrogen,which are prepared and valued according to the GB/T 5274.1-2018 Gas analysis-Preparation of calibration gas mixtures-Part 1:Gravimetric method for classⅠmixtures,it is prepared and calibrated by weighing method.By controlling the uncertainty of raw material gas detection,weighing process,preparation process and uniformity stability to meet the development requirements,the study period is one year.