Concentration by centrifugation for gas exchange EPR oximetry measurements with loop-gap resonators.

@article{Subczynski2005ConcentrationBC,
  title={Concentration by centrifugation for gas exchange EPR oximetry measurements with loop-gap resonators.},
  author={Witold K Subczynski and Christopher C Felix and Candice S Klug and James S. Hyde},
  journal={Journal of magnetic resonance},
  year={2005},
  volume={176 2},
  pages={244-8}
}
Measurement of the bimolecular collision rate between a spin label and oxygen is conveniently carried out using a gas permeable plastic sample tube of small diameter that fits a loop-gap resonator. It is often desirable to concentrate the sample by centrifugation in order to improve the signal-to-noise ratio (SNR), but the deformable nature of small plastic sample tubes presents technical problems. Solutions to these problems are described. Two geometries were considered: (i) a methylpentene… CONTINUE READING

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