Analysis of Purity and Uncertainty for 1, 2, 3, 4-Tetrachlorobenzene with the Mass Balance Method

Kang MA; Ran YANG; Hai-feng WANG; Ya-juan HE; Fei LIU

2013 Vol. 32, No. 2

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Article navigation > Rock and Mineral Analysis > 2013 > 32(2): 334-339

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Kang MA, Ran YANG, Hai-feng WANG, Ya-juan HE, Fei LIU. Analysis of Purity and Uncertainty for 1, 2, 3, 4-Tetrachlorobenzene with the Mass Balance Method[J]. Rock and Mineral Analysis, 2013, 32(2): 334-339.

Citation:

Kang MA, Ran YANG, Hai-feng WANG, Ya-juan HE, Fei LIU. Analysis of Purity and Uncertainty for 1, 2, 3, 4-Tetrachlorobenzene with the Mass Balance Method[J]. Rock and Mineral Analysis, 2013, 32(2): 334-339.

Analysis of Purity and Uncertainty for 1, 2, 3, 4-Tetrachlorobenzene with the Mass Balance Method

1.
Division of Chemical Metrology and Analytical Science, National Institute of Metrology of China，Beijing 100013， China
2.
Department of Water Resource and Environment, China University of Geosciences (Beijing)，Beijing 100083, China

Received Date: 07 March 2012

Accepted Date: 24 May 2012

Abstract

Abstract

A traceable method is presented, to study the purities of certified reference material of 1,2,3,4-tetrachlorobenzene with the assessment of uncertainties. The purities of 1,2,3,4-tetrachlorobenzene were determined by the mass balance method. The qualitative analysis of main non-volatile impurities was identified as 1,2,3,5-tetrachlorobenzene with Gas Chromatography-Mass Spectrometry (GC-MS) and standard addition. The quantitative analysis for the impurities was measured by Gas Chromatography-Flame Ionization Detector (GC-FID). The content of water and ash in 1,2,3,4-tetrachlorobenzene were respectively measured by Karl-Fischer titrator and ignited at 900℃ in a muffler roaster. The residuals of solvent were confirmed as ethyl ether by Headspace Gas Chromatography-Mass Spectrometry. The certified result with the mass balance method was 98.79% and the expanded uncertainty was 0.20% (k=2). The good homogeneity result in the 95% confidence interval was validated by F-test and t-test statistical methods with samples from 500 different bottles. The stability inspection was carried out on short-term (one month) and long-term (12 months) tests, and the results indicate that the stability period for 1,2,3,4-tetrachlorobenzene of storage is no less than 12 months at 20℃.
- mass balance method /
- 1,2,3,4-tetrachlorobenzene /
- certified reference materials /
- purity analysis /
- uncertainty evalution

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References

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