Hyphenated low‐field NMR techniques: combining NMR with NIR, GPC/SEC and rheometry

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.