Geo High Pressure NMR
Precision Spectroscopy

Get unprecedented insight into the inner working phenomena
of high pressure chemistry.

Geo High Pressure NMR Precision Spectroscopy

NMR is a powerful tool for analyzing organic and inorganic compounds, and reaction kinetics. Until recently, it has only been possible to use NMR at relatively modest pressures since the modelling used to predict the various properties, cannot be verified at high pressures.

The Aspect GEO NMR system solves the problem of High Pressure experiments and opens up this exciting area of research to the Geochemist.   The Aspect GEO is a MRI scanner capable of a wide range of MRI and NMR experiments.  At its heart is the patented M3 magnet, a super wide bore horizontal magnet with zero running costs that can be placed in basically any lab (the magnet is on wheels). Furthermore, the GEO system is capable of upgrading to FlowScanTM (Rheology), ex vivo MRI, in vivo MRI and rock core analysis.

Geochemical applications

  • Aqueous-solution reaction kinetics
  • Equilibrium constants
  • Diffusion coefficients
  • Metal complexation
  • Hydrocarbon chemistry
  • Pressure-induced isomerization

Now, with Aspect AI’s patented permanent magnet technology you have the perfect platform to conduct high-pressure experiments.

Aspect AI is the only company able to provide this solution, and features:

  • 1T field strength minimizes susceptibility artifacts
  • Widest bore size in the industry allows for a high pressure probe

Our magnets are extremely compact, self-shielded, zero-cryogen and virtually maintenance-free, making them extremely economical and ideal for placement in any laboratory.

The system and software are extremely easy-to-use and intuitive, making it perfect for both novice and expert NMR users.


The central component of the entire system is Aspect AI’s unique High Pressure NMR Probe.

The probe does much of the work in an NMR spectrometer, placed in the center of the magnetic field to perform NMR analysis on a given sample.

Aspect AI’s unique High Pressure NMR Probe can apply up to 2 gigapascals (20kbar) of pressure to a sample, providing researchers with unprecedented insight into the inner working phenomena of high pressure chemistry.

In a recent research paper from September 2015, NMR was used to measure the T1 of a small prepared sample at increasing pressures and temperatures.  This information can help to monitor and predict the reaction kinetics in the earths mantle and thus try to elucidate the geochemistry of the earths crust.


The Probe: Manufacturing, Specifications and Design

At the heart of the system is a relatively simple probe for aqueous geochemistry (up to 2.0GPa pressure), using a ruby fluorescent spectroscope is used to measure the pressure applied to a sample – anywhere from 15µl to 1ml[1] and includes:

  • Copper beryllium housing
  • Hydraulic jack applies pressure to probe
  • Tungsten rods apply pressure to sample
  • Ruby fluorescent shift spectroscope/spectrometer measures pressure
  • Min sample size ~15µl, max sample size 1ml
  • Probe width ~4cm (subject to change)
  • RF coils are consumable, used typically once per experiment.
  • Coils are connected to AMOS spectrometer via BNC connectors (pressure held in using epoxy resin)

The probe has been designed in close collaboration with the University of California, Davis (UCD), a renowned pioneer in this field of research.[2]

[1] Uwatoko et al., 2002 J. Phys. Cond. Matter 14, 11291 .  Walker, I. R. (1999 Rev. Sci. Inst. 70, 3402

[2] H and La NMR Spectroscopy in Aqueous Solutions at Geochemical Pressures. Gerardo Ochoa, Corey D. Pilgrim, Michele N. Martin, Christopher A. Colla, Peter Klavins, Matthew P. Augustine, and William H. Casey.

Close-up of the NMR Probe :
         Probe1

The probe is placed in a large protective cylinder to withstand the high pressures

The measurement is simple: the graphs below are for increasing pressure:
      

This is a unique tool for scientists to perform research of the most precise and exacting standards. Aspect AI technology opens up a new world of high-pressure NMR analysis, including reaction kinetics, equilibrium constants, diffusion coefficients, metal complexation, hydrocarbon chemistry and pressure-induced isomerization – all at unprecedented pressures.
Aspect Imaging’s wide bore permanent magnet is a very versatile system, and can easily be adapted and/or upgraded to be used for MRI analysis of rock core samples, or used in conjunction with a Flowloop and used to measure the rheology of both Newtonian and Non-Newtonian fluids.
Please click here for a quotation!  

Conclusion
Ultra-High Pressure NMR is a new and exciting field of research which, for the first time, enables the Geochemist to simulate geochemical conditions in the lab at ultra-high pressures. The NMR results allow the geochemist to model or hypothesize reaction kinetics in the earth’s mantle as part of a comprehensive analysis of the geochemistry of the earth’s crust.

The Aspect M3 Compact MRI Systemm3
Aspect AI provides the total solution: a compact MRI scanner and ultra-high pressure NMR cell. This versatile system can be further upgraded for a wide range of geochemical experiments.

Be at the forefront of this new field of scientific research

Customer testimonials:

Professor William H. Casey
Department of Chemistry
University of California, Davis

“My field of research is geochemistry, mineralogy and aqueous solution chemistry.  I couple Aspect Imaging’s MRI system to our high-pressure NMR probes, which allows me and Prof. Matt Augustine to collect spectra on solutions at gigapascal pressures, corresponding to depths below the bottom of the Earth’s crust.  These probes are made of exotic alloys and we exploit the superb shimming capabilities, and large sample sizes, of the Aspect instrument to collect well-resolved spectra on solutes.  No one in the world can make these measurements except for us and use of the Aspect MRI system is key.”   

Professor Matthew P. Augustine
Department of Chemistry
University of California, Davis

“My university bio-sketch says that I am a physical chemist but my time with Erwin Hahn, Alex Pines and Kurt Zilm made me a resonator at heart.  My research interests are in using NMR of all sorts to study non-traditional problems that present geometrical challenges not amenable to conventional instrumentation.  That is a fancy way of saying our samples are never in tubes, range in size from millimeters to meters, and that we build everything that goes into the bore of the magnet.  I have used the Aspect systems to provide background data to support our tomato spoilage detection effort in collaboration with the largest food packing company in the world, to do rheology and flow studies of delicate emulsions flowing in pipes and to examine liquid-solid phase transitions in these emulsions for a large consumer products company.  Recently Aspect’s MRI instruments were being used to provide chemical shift resolved spectra at high pressure.  It is the superb rf performance, pulsed field gradient control and magnet stability offered by Aspect Imaging products that allowed the highest pressure, liquid state, multi-dimensional NMR spectra to be recorded to date.  The Aspect MRI has been reliably producing data at UCDavis for 11 years and has proved to be extremely reliable and easy to use research instrument.”

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