Table 1 \(\Delta \alpha\) and \(\Delta {\sigma}_{0}\) for different samples. Frequency shift thermal coefficient difference \(\Delta \alpha =\alpha\)(\({}^{1}{\rm{H}}\))\(-\alpha\)(\({}^{23}{\rm{Na}}\)) (in ppm/\({}^{\circ }\)C), and intercept difference \(\Delta {\sigma }_{0}={\sigma }_{0}\)(\({}^{1}{\rm{H}}\))\(-{\sigma }_{0}\)(\({}^{23}{\rm{Na}}\)) (in ppm), were measured in different samples, either using self-calibration from the sample itself or pre-calibration from the solutions with 0.1–26% weight of NaCl.
Samples | Calibration | \(\Delta \alpha\) (ppm/\({}^{\circ }\)C) | \(\Delta {\sigma }_{0}\) (ppm) |
|---|---|---|---|
Solution 1% | Solutions 0.1–26% | 0.010690 | 0.056744 |
Solution 1% | Self-calibration | 0.010301 | 0.070416 |
Solution 0.3% | Solutions 0.1–26% (fit) | 0.010720 | 0.075141 |
Agarose | Self-calibration | 0.010321 | 0.075775 |
Brain | Self-calibration | 0.011060 | 0.023918 |
Muscle | Self-calibration | 0.011887 | −0.01556 |
Kidney | Self-calibration | 0.011206 | 0.029343 |
Liver | Self-calibration | 0.011500 | 0.034852 |
