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Acronym RAW stands for randomization approach for water suppression[1].

RAW element consists of a selective 90o pulse on solvent resonance, followed by a strong PFG along z axis. The selective rf pulse tips magnetization of solvent (water) resonance to transverse plane, and the field gradient dephases the magnetization.

This technique improves water suppression in the experiments using non-excitation readout techniques (e.g. watergate, water flip-back).


  1. Altieri, AS and Byrd, RA. Randomization approach to water suppression in multidimensional NMR using pulsed field gradients. Journal of Magnetic Resonance, Series B 107(3):260--266, 1995. BibTeX [raw]
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