痕量甲基肼标准气体的研制及其不确定度评定  

Preparation of Trace MMH Gas Reference Material and Evaluation for Uncertainty

作　　者：慕晓刚 朱天一 许峰[2] 王煊军 MU Xiao-gang;ZHU Tian-yi;XU Feng;WANG Xuan-jun(Zhijian Laboratory,Rocket Force University of Engineering,Xi′an 710025,China;CNGC Institue 53,Ji′nan 250031,China)

机构地区：[1]火箭军工程大学智剑实验室,陕西西安710025 [2]中国兵器工业集团第五三研究所,山东济南250031

出　　处：《化学试剂》2024年第2期107-113,共7页Chemical Reagents

摘　　要：基于渗透法原理,建立了痕量甲基肼标准气体的发生方法和不确定度评定模型。采用预先测定过的高纯度甲基肼为原料,通过自动称量定值的方式制备了符合拟定标准气体渗透率要求的渗透管,采用载有渗透管的多功能气体校准装置实现了标准气体的发生。使用GUM法对渗透管渗透率的不确定度进行了评定,并采用MCM法对甲基肼标准气体的量值不确定度进行了评估。相对扩展不确定度小于5%,表明该标准物质在甲基肼气体检测仪的校准与性能评价方面具有实用价值。Based on the principles of permeation,a method for generating trace methyl hydrazine standard gas and an uncertainty assessment model were established.Using pre-determined high-purity methyl hydrazine as the raw material,we prepared a permeation tube that meets the specified standard gas permeation rate requirements through an automated weighing process.The multifunctional gas calibration device equipped with permeation tube was used to realize the generation of standard gas.The GUM method was used to evaluate the uncertainty of the permeability of the permeation tube,and the MCM method was used to evaluate the uncertainty of the methylhydrazine standard gas value.With a relative expanded uncertainty of less than 5%,it indicates that this standard material has practical value in the calibration and performance evaluation of the methylhydrazine gas detectors.

关 键 词：标准气体 甲基肼 渗透法 不确定度评定 蒙特卡洛法 

分 类 号：TQ421[化学工程]