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Anal Bioanal Chem

Title:		SI-traceable purity assignment of volatile material ethylbenzene by quantitative nuclear magnetic resonance spectroscopy
Author(s):		Wan K; Li M; Huang T; Sun X; Li H; Zhang T; Tao H; Song S; Zhang W; Tang G;
Address:		"College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China. Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing, 100029, People's Republic of China. Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing, 100029, People's Republic of China. zhw@nim.ac.cn. College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China. tgs1803@163.com"
Journal Title:		Anal Bioanal Chem
Year:		2022
Volume:		20220127
Issue:		7
Page Number:		2461 - 2469
DOI:		10.1007/s00216-022-03887-x
ISSN/ISBN:		1618-2650 (Electronic) 1618-2642 (Linking)
Abstract:		"In this study, a quantitative nuclear magnetic resonance (qNMR) method was developed to assign the SI-traceable purity of ethylbenzene, a volatile material, which is a colorless flammable liquid hydrocarbon at room temperature. An ethanol certified reference material having a similar boiling point was used as an internal standard to avoid measurement error arising from the volatilization of ethylbenzene. The reference value of the ethylbenzene study material was obtained by the mass balance method by subtracting all the impurities including water, inorganic impurities, and structurally related impurities (e.g. acetophenone, benzene, isobutylbenzene, sec-butylbenzene, methylcyclohexane), which is regarded as the traditional approach for purity assignment for organic compounds. The results of qNMR showed that the purity of the ethylbenzene study material was 998.6 +/- 3.8 mg/g at a 95% confidence interval, which was consistent with the reference value of 998.9 +/- 1.3 mg/g"
Keywords:		Ethylbenzene Method validation Quantitative 1H-NMR Volatile material;
Notes:		"PubMed-not-MEDLINEWan, Kangni Li, Ming Huang, Ting Sun, Xiaonan Li, Hongmei Zhang, Tianji Tao, Hong Song, Shanjun Zhang, Wei Tang, Guangshi eng Germany 2022/01/29 Anal Bioanal Chem. 2022 Mar; 414(7):2461-2469. doi: 10.1007/s00216-022-03887-x. Epub 2022 Jan 27"