Fig. 3: Benchmarking of hydrogen concentrations n(1H) obtained from μQ-NMR.

The investigated hydrogen or water concentrations range over three orders of magnitude from  ~102 to 105 μg/g. NMR-derived values of n(1H) have been compared to concentrations derived from standard methods. The red line is a guide to the eye depicting a 1:1 correlation. NAMs is an abbreviation for nominally anhydrous minerals. Brg and Stv are abbreviations for Bridgemanite and Stishovite respectively. The data of metal hydrides are cited from Meier et al.52. Source data are provided as a Source Data file.