NMR Solvent Peak Suppression by Piecewise Polynomial Truncated Singular Value Decomposition Methods

Abstract

A new modified singular value decomposition method, piecewise polynomial truncated SVD (PPTSVD), which was originally developed to identify discontinuity of the earth`s radial density function, has been was used utilized for the large solvent peak suppression and noise elimination in nuclear magnetic resonance (NMR) signal processing. PPTSVD consists of two algorithms of truncated SVD (TSVD) and L1 problems. In TSVD, some unwanted large solvent peaks and noises are suppressed with a certain soft threshold value, whereas signal and noise in raw data are resolved and eliminated out in L1 problems. These two algorithms were systematically programmed enough to produce high quality of NMR spectra, including a the better solvent peak suppression with good spectral line shapes and better noise suppression with a higher signal to noise S/N ratio value up to 27% spectral enhancement, which that can be is applicable to multidimensional NMR data processing.