一种燃料热沉标准物质候选物的纯度定值及不确定度分析

doi:10.3969/j.issn.1000-1158.2021.06.20

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Abstract A kind of polycyclic hydrocarbon compound can be used as a candidate of fuel heat sink reference material for hypersonic aircrafts, which is of great significance on heat sink measurement. Two different methods, mass balance and quantitative nuclear magnetic resonance approaches were adopted to characterize the purity of the candidate. Moreover, main uncertainty contributions were analyzed, and then the uncertainty of the purity of the candidate was evaluated. In the process of purity valuation, GC-FID was used to test the homogeneity and stability of the subpackage samples. The results showed that the candidate has a good homogeneity, and can store for at least one year under normal storage conditions (20 ℃, 101.325 kPa). The purity of the candidate is 99.42% with the expanded uncertainty of 0.84% (k=2).

Key words： metrology heat sink polycyclic hydrocarbon reference material candidate mass balance quantitative nuclear magnetic uncertainty

Received: 13 April 2020 Published: 23 June 2021

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TB99

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.06.20 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I6/815

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