Comparison of Spectral Data of Metabolites Collected from Bruker and arian 600 MHz Spectrometers

The spectral data were collected from the two 600 MHz spectrometers from the two major manufacturers, Bruker and Varian. The samples were prepared to create standard curves for quantitative measurements of metabolite concentrations. Instead of employing one-dimensional H-1 experiments, the two-dimensional H-1-C-13 HSQC experiments were performed for better separation of resonances. For some resonances, the high salt condition hindered the linear correlation between the intensity and actual metabolite concentration. Excluding overlapped ones, most resonances showed good linearity. Although the Varian spectrometer showed better linearity, both spectrometers were able to generate acceptable standard curves. From this data, we could identify resonances that could be used to better quantify the concentrations of the particular metabolites. With these standard curves, the quantitative measurements of the metabolites from the real samples will be facilitated.