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DRX-499 has remained, for many years, the mainstay 500 MHz spectrometer for most of the research work using NMR in the department. It continues to be a popular spectrometer that is very reliable and stable. It is used for multinuclear 1D as well as 2D spectra acquisition.

Between the two 500 MHz instruments, DRX-499 is preferred for 13C, 19F, and 31P detection.


  • Bruker Avance DRX series instrument
  • 1H Frequency: 500.13 MHz
  • 2H field-frequency lock system
  • MAGNET and Shim system
    • Oxford narrow bore (53mm) Cryomagnet
    • BOSS2 shim system
    • 28 RT shim gradients
    • BSMS/2 keyboard
    • Bruker vibration damper system included (doughnut type)
  • Host Operating System: RedHat Enteprise Linux 6.2
  • VT range: −80°C to +70°C (up to 12 hrs. at max temperature)
  • RF Section
    • Three channels (FCU1, FCU2 and FCU3)
    • Dual (50 W 1H + 300W X) BLAXH50 amplifier
    • Dedicated 300W BLAX300RS amplifier for third channel
    • System is equipped with QNP switch accessory to perform 19F {1H} double resonance experiments.
    • HPPR/2 2H-STOP preamplifier.
    • Pulse shaping capability to design shaped and shifted RF pulses and gradient pulses.
  • Digital
    • Digital quadrature detection
    • 5 MHz sampling rate ADC
    • Accustar Z gradient amplifier that can generate a maximum of 56 Gauss/cm field gradients is part of the system.
    • Gradient assisted shimming can be performed with available software in Topspin.
  • Software
    • Runs on TOPSPIN 1.3

Currently installed Probehead

Bruker triple resonance BBO : X { 1H } with Z-gradient

Other probeheads available:

  • Bruker triple resonance TXO : 19F { 1H,13C } with Z-gradient
  • Bruker triple resonance HCP : 1H { 13C, 31P } with Z-gradient
  • Bruker triple resonance HCN : 1H{ 13C, 15N } with Z-gradient