In the previous post I mentioned that indirect referencing was required to compare spectra collected in methanol-d4 and methanol-d3. Indirect referencing relies on precisely determined ratios of the 1H gyromagnetic ratio and the gyromagnetic ratio of the nucleus being referenced. Unfortunately, many different values of this ratio, known as Xi (Ξ), have been reported. Here I test several of these Ξ values to see how closely they match referencing to an internal standard.
