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. Author manuscript; available in PMC: 2025 Mar 12.
Published in final edited form as: Anal Chem. 2024 Feb 15;96(10):4171–4179. doi: 10.1021/acs.analchem.3c05233

Figure 4.

Figure 4.

a) Schematic of spin-relayed SABRE-SHEATH hyperpolarization of [15N3]metronidazole. b) 15N spectrum of thermally polarized neat [15N]pyridine (obtained using 64 scans with repetition time of 10 min) used as a signal reference for computing 15N signal enhancement and P15N values. c) 15N spectrum of HP [15N3]metronidazole obtained using 1 scan and otherwise the same acquisition parameters. d) Magnetic field sweep of SABRE-SHEATH process using temperature of ~18 °C. e) Temperature sweep of SABRE-SHEATH process at a field of 0.6 μT.