高准确度氮中二氯二氟甲烷气体标准物质研制  

Development of High Accuracy Dichlorodifluoromethane Gas Reference Material in Nitrogen

作　　者：张文申 许峰 张符 林帅 王丽 荀其宁 ZHANG Wenshen;XU Feng;ZHANG Fu;LIN Shuai;WANG Li;XUN Qining(Shandong Nonmetallic Materials Institute,Jinan 250031,China;Weihai Huancui District Marine Development Research Center,Weihai 264200,China)

机构地区：[1]山东非金属材料研究所,山东济南250031 [2]威海市环翠区海洋发展研究中心,山东威海264200

出　　处：《低温与特气》2024年第4期32-37,共6页Low Temperature and Specialty Gases

摘　　要：介绍了高准确度氮中二氯二氟甲烷混合气体标准物质的研制过程,主要包括混合气配制、混合气均匀性检验、稳定性考察和称量法定值等过程。研制的氮中二氯二氟甲烷混合气体标准物质浓度范围为10.0~100(μmol/mol),F检验和回归曲线法结果表明,该混合气体标准物质压力为0.5~10 MPa,均匀性及稳定性良好,标准物质定值结果的相对扩展不确定度为2%(k=2),有效期为12个月。This paper introduces the development process of the mixed gas reference material of dichlorodifluoromethane in nitrogen with high accuracy,including the preparation of the mixed gas,the homogeneity test of the mixed gas,the stability inspection and the weighing legal value.The nominal concentration of the developed dichlorodifluoromethane mixed gas reference material in nitrogen is 10.0~100(μmol/mol).The results of F test and regression curve method show that the mixed gas reference material has good homogeneity and stability in the pressure range of 0.5~10 MPa.The relative expanded uncertainty of the calibration results is 2%(k=2),and the validity period is 12 months.

关 键 词：高准确度 称量法 二氯二氟甲烷 气体标准物质 

分 类 号：O652.3[理学—分析化学]