|
Spectrometer (Field) / Probe |
(1H sens.) 0.1%Ethyl Benzene (EB) |
(1H sens.) 10%Ethyl Benzene (EB) |
Sucrose (2 mM in H2O:D2O 9:1) |
(13C) ASTM (60% C6D6and 40% p-Dioxane) |
(19F) Trifluorotoluene 0.05% in CDCl3 |
|
Kerry (500)/CP TXO |
1391 |
1691 |
|||
|
Kerry (500)/RT TXO |
373 |
228 |
|||
|
Devon (500)/CP TCI |
4387 |
882 |
918 |
||
|
*mass equiv. |
318 |
55 |
67 |
||
|
Kurgan (600)/ 1.7 mm |
973 |
303 |
67 |
||
|
*mass equiv. |
16000 |
5050 |
1100 |
||
|
Vosges (600)/CP TXO |
7175 |
1286 |
1394 |
7682 |
|
|
*mass equiv. |
430 |
77 |
85 |
||
|
|
1527 |
374 |
|||
|
Telemark (750)/CP TXI |
6091 |
758 |
1060 |
||
|
Telemark (750)/RT TXI |
1866 |
483 |
|||
| Fleckvieh | 10276 | 1735 | 1505 | 1861 |
CP – cryoprobe
RT – room temperature probe
*mass equiv. – this is the effective S/N for the equivalent mass of material compared across the 600 MHz spectrometers. Thus, if a sample is quantity limited, not solubility limited, cramming it all into the 1.7 mm tube to run on Kurgan will give the best S/N.
Comments:
- Telemark vs. Vosges in S/N:
Vosges’ cryoprobe has about 15% greater S/N than Telemark’s cryoprobe for EB but a whopping 70% for sucrose. This is due to a mix of console improvements (probably minor) and cryoprobe improvements. For scaling, assuming the ratios hold true, a new cryoprobe for Telemark should be about 20% better S/N for EB and 40% better S/N for sucrose than the probe on Vosges, or 85% better S/N for EB and 55% better for sucrose than the current probe.