RF Heating Reduction with Uncompromised NMR Performance

Efree Probes for both Static and Rotating Solids

RF sample heating results from the interaction between the electric field and the sample. In the case of wet and salty samples (such as for biological samples) the use of high amplitude proton decoupling can lead to excessive sample heating. This situation can be alleviated by reducing the E-field at the location of the sample. A low inductance proton RF coil can achieve this.

Minimizing RF Heating

Bruker’s Efree probes employ the combination of a low inductance proton coil with a high efficiency solenoid for observe frequencies, yielding a probe with:

  • Minimal RF Heating
  • Uncompromised RF performance on proton
  • Uncompromised performance on observe channels
  • Excellent B1-homogeneity on all channels
  • Outstanding tuning stability

Built for your Applications

Efree probes are available for static as well as MAS applications. Crystalline proteins achieve a very high resolution in magic angle spinning probes while proteins aligned in bicelles or oriented membranes are measured in the static probes.

Efree Probes for Biological Solid State NMR

  • Available from 500 to 950 MHz
  • In double and triple resonance configurations
  • MAS probes:

    • 4 mm or 3.2 mm
    • Automatic sample eject

  • Static probes:

    • Flat coil (for samples oriented on glass plates) or
    • Solenoid (for samples oriented in bicelles)