_Chem_shift_ref.Ref_method
| Description | The chemical shift reference may be either internal (the compound is located in the sample) or external (the compound is in a container external to the sample). |
| Details: | |
| Parent saveframe | chem_shift_reference |
| Data type | line |
| Allowed values | external internal na |
| DB table | Chem_shift_ref |
| DB column | Ref_method |
| DB type | VARCHAR(127) |
| NULL allowed | yes |
| ADIT-NMR deposition system prompt | Reference method |