氯苯标准气体的研制  

Development of Gas Standard of Chlorobenzene

作　　者：李宁[1] 郭健[1] 樊强[1] 王帅斌[1] 王倩[1] 田文[1] 

机构地区：[1]环境保护部标准样品研究所,北京100029

出　　处：《计量学报》2013年第1期68-71,共4页Acta Metrologica Sinica

摘　　要：介绍了氮气中氯苯标准气体的研制方法。氯苯标准气体所采用制备方法为称量法，分析方法为GC—FID法。实验结果显示，氯苯标准气体具有良好的线性、瓶内均匀性和稳定性，有效期为12个月。研究制备的氯苯标准气体标准值为1—5μmol／mol，相对扩展不确定度为5％（置信度为95％），与美国Scott Specialty Gases的同类标准气体具有可比性。The development method of a chlorobenzene gas standard are described. Chlorobenzene gas. standard is prepared by gravimetric method and is intercompared to the existing gas cylinder standards using gas chromatography with a hydrogen flame ionization detector. The linear regression analysis show excellent agreement among the standards for chlorobenzene. As a result of with-in homogeneity, the data show that ehlorobenzen are homogeneous in the cylinder, the long-term stability of the gas standard is as long as 12 months. The certified value of developed ehlorobenzene gas standard is 1 -5 Ixmol/mol,and the relative expanded uncertainty is 5% at the 95% confidence interval for chorobenzene, it agree with the similar standard gas from Scott Specialty Gases.

关 键 词：计量学 标准气体 氯苯 均匀性 稳定性 不确定度 

分 类 号：TB99[一般工业技术—计量学]