Fig. 5. ¹H spectra of 9% benzene/0.001 M TEMPO dissolved in SF CO₂ at 4.7 T. (a) Static ¹H NMR (S/N = 20), (b) flow ¹H NMR (S/N = 17) and (c) flow ¹H DNP (S/N = 124). Total flow of SF CO₂ was 1.1 mL min^–1. SF CO₂ conditions: d = 0.805 g mL^–1, SFC oven temperature 40 °C, P = 165 atm. All spectra were collected at 32 scans.