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ESR spectrometer

Bruker/Magnettech ESR5000 benchtop ESR Spectrometer.

  • ESR spectrometer is intended for studying materials containing unpaired electrons
  • Measuring oxidative stability and antioxidant capacity in model/food systems
  • Determining the local environment of spin-labelled molecules in various media

Electron Spin Resonance (ESR) or Electron paramagnetic resonance (EPR) is a unique and sensitive technique for detection of radical formation and antioxidant properties. Small sample amount (mg) is necessary and typical requires no to very limited sample preparation.

  • ESR detects paramagnetic compounds (i.e. free radicals and transition metal ions)
  • Used to study the early oxidative changes in various food systems (radical formation)
  • Small amount of sample is placed in a strong magnetic field where paramagnetic compounds such as radicals absorb microwave energy due to the transition of unpaired electrons  --> we get a signal