Solvent signal suppression

High Power Spin-Lock Purge Pulses 11. Solvent signal suppression by spin-lock pulses... 

Solvent signal suppression is necessary in order to achieve a reduction of the NMR signal entering the receiver for observing small analyte signals in the... 

Figure 1.13 Increase in receiver gain without solvent signal suppression (a) free induction decay (b) resulting NMR spectrum...

Figure 1.15 The 1 H NMR spectra of 12 xg retinoic acid in ACN/D20 (60/40), (a) without and (b) with solvent signal suppression...

Fig. 2.11 (a) Solvent signal suppression, (b) coherence suppression (IH signals of 12c isotopomers). 

Examples Solvent signal suppression experiment [5.7], selective COSY... 

Binomial pulses, which are predominantly used in signal suppression sequences, such solvent signal suppression experiments will be discussed as a special category. 

Selective pulses are widely used in many pulse sequences [5.88, 5.89], not just for solvent signal suppression. The transformation of an n dimensional experiment into a (n-x) dimensional experiment by the application of x selective pulses not only reduces experiment time but it also keeps the acquired data matrix to a minimum. The implementation of selective pulses can be easily incorporated into pulse sequence design but the choice of selective pulse and associated parameters depends upon the current problem under investigation. When implementing pulse sequences that use selective rf pulses the following aspects must be considered ... 

Filter elements have been developed, not just for coupling evolution, but also for chemical shift selection [5.215 - 5.221]. An early example was the jump-return method for solvent signal suppression. Check it 5.2.3.3, whereby the resonances at a given chemical shift and related multiples were suppressed. In common with the z-filter for zero-quantum suppression, the CSSF (Chemical 5hift iSelective Filter) element uses different free precession periods to give varying degrees of chemical shift evolution for each scan in a multiple scan experiment. 

Zheng, G. and Price, W.S. 2010. Solvent signal suppression in NMR. Progr. Nucl. Magn. Reson. Spectrosc. 56 267-288. 

Pulse sequences for solvent signal suppression Platt and Sykes, J. Chem. Phys. 54 1148... 

Gueron M, Plateau P and Decorps D (1991) Solvent signal suppression in NMR. Progress in NMR Spectroscopy 23 135- 209. 

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