_Chem_shift_ref.External_ref_loc
| Description | External chemical shift references are defined as either located within the sample (e.g. as a capillary) or external to the sample and are inserted into the spectrometer before after or both before and after the sample containing the molecular system s |
| Details: | |
| Parent saveframe | chem_shift_reference |
| Data type | line |
| Common values | insert at center of a separate sample tube insert at center of experimental sample tube insert at outer edge of a separate sample tube insert at outer edge of experimental sample tube other separate tube (no insert) not similar to the experimental sample tube separate tube (no insert) similar to the experimental sample tube |
| DB table | Chem_shift_ref |
| DB column | External_ref_loc |
| DB type | VARCHAR(127) |
| NULL allowed | yes |
| ADIT-NMR deposition system prompt | External reference compound location |