Sensitivity Between Oxygen and EPR Signal Dealing with Carbon Black Used as Biosensor

In order to identify potential candidates as sensors for in vivo EPR oximetry, we carried out a systematic study among commercially available carbon black. A total of 43 carbon blacks were tested. Only two carbon blacks presented a stable, reproducible, and sensitive response to pO(2) for more than 2 months. Therefore, these two carbon blacks should be considered as good candidates to be used as oxygen sensor using in vivo EPR spectroscopy.