Recovery of Underwater Resonances by Magnetization Transferred NMR Spectroscopy (RECUR-NMR)

✍ Scribed by Maili Liu; Huiru Tang; Jeremy K. Nicholson; John C. Lindon

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 106 KB
• Volume: 153
• Category: Article
• ISSN: 1090-7807
• DOI: 10.1006/jmre.2001.2424

✦ Synopsis

A method for detecting small molecule NMR resonances under a water peak in biological samples is presented. After high-efficiency solvent suppression using double WATERGATE, either a TOCSYor ROESY-based coherence transfer sequence is applied to reestablish the resonances close to, or under, water through magnetization transfer using scalar or dipolar coupling, respectively. The use of the TOCSY and ROESY methods ensures an in-phase magnetization transfer, which makes the new approach readily extended for the measurement of transverse relaxation times, internuclear ROEs, and ROE buildup rates. An extension of the new approach for J-resolved spectroscopy is also presented and tested using a sample of human blood plasma.