A low cost, portable NMR probe for high pressure, MR relaxometry.

• A novel high pressure NMR probe design that interfaces with unilateral magnets. • Commercial pressure reactor modified to create a NMR probe. • Inexpensive high pressure probe design and construction. • Pressure dependent relaxometry correlation. A low cost, portable, high volume, stainless steel pressure reactor is modified to easily perform magnetic resonance relaxometry at industrially relevant pressures. Unlike existing pressurization strategies common to nuclear magnetic resonance (NMR) spectroscopy, this approach is amenable to realistic samples that feature heterogeneity and have traditionally escaped NMR study at pressure. This pressure reactor/NMR probe combination is easily accommodated by most single-sided and other low magnetic field permanent magnet assemblies. The performance of the probe is demonstrated by accomplishing NMR relaxometry on polydimethylsiloxane at different pressures with two types of unilateral magnets. [ABSTRACT FROM AUTHOR]