VUBNMR Spectrometer Information

Spectrometer:
T
TESET
K
On the 502_CP TESET = 298.00 K corresponds to 298.00 K
At 298.00 K chemical shift of HDO is 4.773 ppm


The Temperature on this instrument has been corrected internally
The set temperature reflects the sample temperatur.

The Temperature range on all Cryoprobes here is about 0 - 50 oC
The range on 601 is -35 to 60 oC
The maximum heater power is not to exceed 25%!
If you need another temperatur, please contact any staff.

Temperature range for Spinners

  • White spinner: 223 - 353K (-50 to +80oC)
  • Blue spinner : 223 - 323K (-50 to +50oC)
  • Ceramic spinner: 90 - 450K (-183 to 177 oC)
(Ceramic spinners are very expensive and shoud ONLY be used for extreme temperature experiments)

If you need an exact temperature under your conditions, calibrate the temperature yourself using the 100% Methanol or 80% Ethylene Glycol sample!
See Bruker Manual Variable Temperature Unit

Correction for 80% Ethylene Glycol (300 to 323K):
T(K) = -108.33 (Δppm) + 460.41

Correction for 4% Methanol (283 to 300K):
T(K) = -114.83 (Δppm) + 471.85

More about the chemical shift temperature dependence of water can be found in:
M. Findeisen, et.al. A 1H-NMR thermometer suitable for cryoprobes, Magn. Reson. Chem. 2007 ; 45: 175–178

R.E. Hoffman, Standardization of chemical shifts of TMS and solvent signals in NMR solvents, Magn. Reson. Chem. 2006 ; 44: 606–616

H.E. Gottlieb, et.al., NMR Chemical Shifts of Common Laboratory Solvents as Trace Impurities,J. Org. Chem., 1997 , 62 (21), pp 7512–7515

David S. Wishart, et.al., 1H, 13C and 15N chemical shift referencing in biomolecular NMR, J. Biomol. NMR, 1995 6 (2), 135-140

A.L. Van Geet, Calibration of the Methanol and Glycol Nuclear Magnetic Resonance Thermometers with a Static Thermistor Probe, Anal. Chem., 1968 , 40 (14), 2227-2229