Räntzsch V, Wilhelm M, Guthausen G. Hyphenated low-field NMR techniques: combining NMR with NIR, GPC/SEC and rheometry.
MAGNETIC RESONANCE IN CHEMISTRY : MRC 2016;
54:494-501. [PMID:
25854997 DOI:
10.1002/mrc.4219]
[Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 12/18/2014] [Accepted: 01/19/2015] [Indexed: 06/04/2023]
Abstract
Hyphenated low-field NMR techniques are promising characterization methods for online process analytics and comprehensive offline studies of soft materials. By combining different analytical methods with low-field NMR, information on chemical and physical properties can be correlated with molecular dynamics and complementary chemical information. In this review, we present three hyphenated low-field NMR techniques: a combination of near-infrared spectroscopy and time-domain NMR (TD-NMR) relaxometry, online (1) H-NMR spectroscopy measured directly after size exclusion chromatographic (SEC, also known as GPC) separation and a combination of rheometry and TD-NMR relaxometry for highly viscous materials. Case studies are reviewed that underline the possibilities and challenges of the different hyphenated low-field NMR methods. Copyright © 2015 John Wiley & Sons, Ltd.
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