When I use TSP as a CSI, why is the TSP peak not at 0 ppm?
8 February 2016 Comments Off on When I use TSP as a CSI, why is the TSP peak not at 0 ppm? Uncategorized
The cNx suite Spectral Reference Library is based on the characteristics of DSS, since its chemical shift does not change with pH; the chemical shift of TSP does change with pH. When you select TSP as a CSI, your spectra are re-referenced as if they had been acquired using DSS to allow accurate comparison with the compound library. Following this adjustment, the chemical shift for TSP is not exactly 0 ppm.
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