Comprehensive multiphase NMR spectroscopy: Basic experimental approaches to differentiate phases in heterogeneous samples

► A comprehensive multiphase (CMP)-NMR probe has been developed. ► It is susceptibility matched, has high power circuits, MAS, lock and gradients. ► It can handle the full range of solution-, gel- and solid-state experiments. ► CMP-NMR permits all bonds in all phases to be studied in unaltered samples. ► It possesses a great potential for the in situ study of heterogeneous systems.