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。
Abstract
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 chlorobenzen are homogeneous in the cylinder,the long-term stability of the gas standard is as long as 12 months.The certified value of developed chlorobenzene gas standard is 1~5μmol/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
Key words
Metrology /
Gas standard; /
Chlorobenzene /
Homogeneity /
Stability /
Uncertainty
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参考文献
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