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 Chenomx Compound 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 rereferenced 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.