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| Development of Gas Standard of Chlorobenzene |
| LI Ning, GUO Jian, FAN Qiang, WANG Shuai-bin, WANG Qian, TIAN Wen#br# |
| Institute for Environmental Reference Materials of Ministry of Environmental Protection, Beijing 100029, China |
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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.
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2013, Vol. 34 
