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| Oxford NMR |
Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user.
With operating frequencies to 200 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. |
NMR Products: |
- Ultra High Field
- VectorShield™ - Ultra High Field Passive Shielding Solutions
- 900 MHz NMR Magnet
- 800 MHz NMR Magnet
- 700 MHz NMR Magnet
- High Field
- 600 MHz NMR Magnet
- 500 MHz NMR Magnet
- Low Field
- 400 MHz NMR Magnet
- 300 MHz NMR Magnet
- 200 MHz NMR Magnet
- Introducing ActivelyCooled™ - A Breakthrough in NMR Technology
- Accessories
- Room Temperature Shims for NMR Magnet Systems
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Model Descriptions: |
| Benchtop NMR |
| MQA7005 |
The new MQA7005 pulsed NMR analyser gives high-precision results for a variety of sample types in a matter of seconds. Launched initially for oil and moisture determination in oilseeds, the instrument can also be used for the measurement of oil/fat in a wide range of materials (for example, seeds, chocolate, sulphur, olives...) |
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| MQA7019 |
The MQA7019 pulsed NMR analyser is an extremely versatile instrument used to measure the fluorine content of materials accurately & non-destructively in a variety of industrial settings. It has considerable advantages in terms of accuracy, repeatability, time, safety and the environment when compared to traditional analytical chemical methods of measuring fluorine content. Typical applications are: fluorine finish on fibre, fluorine in alumina, fluorine in fluorspar, fluorine in aluminium fluoride and fluorine content of toothpaste.
The MQA7019 is a complete alternative to solvent based analysis, resulting in faster, safer measurements. |
| MQA7020 |
The MQA7020 pulsed NMR analyser is an extremely versatile instrument useful in a variety of industrial settings. Typical measurements are: finish on fibre, hydrogen in fuels, rubber in PMMA, molecular weight of oil and characterisation of polymers.
The MQA7020 is a complete alternative to solvent based analysis, resulting in faster, safer measurements. |
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| Ultra High Field |
| VectorShield™ - Ultra High Field Passive Shielding Solutions |
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A major concern for the NMR Spectroscopist is the significant negative effect external electro-magnetic disturbances can have on the quality of NMR data.
Oxford Instruments VectorShield™ enclosures are specifically designed to minimise all of these effects, providing a complete, optimal shielding solution for high-resolution 800MHz and 900MHz NMR installations. |
| Constructed from specially chosen magnetic shielding materials, the VectorShield™ is designed to trap magnetic flux, significantly reducing stray field profiles. At the same time, the shield is also designed to screen the magnet from external field perturbations. |
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| 900 MHz NMR Magnet |
| With operating frequencies at 900 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. As an integral part of an NMR spectrometer, these magnets play a key part in the structural analysis and identification of organic molecules. |
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| Product Information |
| Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user. |
| 800 MHz NMR Magnet |
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With operating frequencies at 800 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. As an Integral part of an NMR spectrometer, these magnets play a key part in the structural analysis and identification of organic molecules. |
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| Product Information |
| Specific applications include Chemical Research, Biochemistry, Pharmaceutical Chemistry, Polymer Science, Petroleum Research, Proteomics and Genomics. Optimised cryostat designs result in ultimate NMR stability and long cryogen hold times. |
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| High Field |
| 700 MHz NMR Magnet |
| With operating frequencies at 700 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. As an Integral part of an NMR spectrometer, these magnets play a key part in the structural analysis and identification of organic molecules. |
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| Product Information |
| Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user.
Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user. |
| 600 MHz NMR Magnet |
| With operating frequencies from 600 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. As an Integral part of an NMR spectrometer, these magnets play a key part in the structural analysis and identification of organic molecules. These magnets have a wider, 89mm room temperature bore, providing increased space for larger samples and NMR probes |
| Product Information |
| Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user. |
| 500 MHz NMR Magnet |
| With operating frequencies to 500 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. As an Integral part of an NMR spectrometer, these magnets play a key part in the structural analysis and identification of organic molecules. |
| Product Information |
| Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user. |
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| Low Field |
| 400 MHz NMR Magnet |
| With operating frequencies to 400 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. As an Integral part of an NMR spectrometer, these magnets play a key part in the structural analysis and identification of organic molecules. |
| Product Information |
| Specific applications include Chemical Research, Polymer Science, Agricultural Chemistry, Medicine, and In-vivo Imaging. An Actively Shielded range of magnets provides significantly reduced stray fields profiles and subsequent ease of siting. Optimised cryostat designs result in extremely long cryogen hold times. |
| 300 MHz NMR Magnet |
| With operating frequencies to 300 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. As an Integral part of an NMR spectrometer, these magnets play a key part in the structural analysis and identification of organic molecules. |
| Product Information |
| Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user. |
| 200 MHz NMR Magnet |
| With operating frequencies to 200 MHz, these magnets have extremely low B0 drift and outstanding field homogeneity, providing excellent resolution and non-spinning line-shape. |
| Product Information |
| Researchers require analytical tools that can deliver accurate, reliable, and reproducible results. Consequently, the technologies inside driving the analytical instruments must help enable these exacting requirements. Oxford Instruments Superconductivity’s world-class status and expertise in supplying superconducting magnets can be attributed to our technical innovation and understanding of both analytical instrumentation and the requirements of the end user. |
| Introducing ActivelyCooled™ - A Breakthrough in NMR Technology |
Introducing ActivelyCooled™ - A Breakthrough in NMR Technology
Oxford Instruments Superconductivity proudly introduces ActivelyCooled™ an innovation in NMR cooling technology, which addresses the issues of cryogen handling and use. With ActivelyCooled™ systems, users have no need to refill the cryogens, making the NMR easier to use than current systems. At the same time, running costs are lowered and NMR technology will be more accessible to areas where cryogens are expensive or less readily available. The development of ActivelyCooled™ also allows for increased flexibility in siting, shorter downtimes associated with cryogen refills, and eliminates the need for liquid nitrogen refills altogether. |
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What is ActivelyCooled™ NMR technology?
The new ActivelyCooled™ from OIS is a helium recondensing technology that eliminates the dependency of the NMR system on liquid cryogen refills. Significant technical strides have been made in the fields of cryogenic capability and vibration isolation to make this achievement possible. ActivelyCooled™ NMR magnets will also fully integrate with the instrument console, providing a new level of ease of use and the potential to reduce overall system complexity. |
| Product Information |
Advantages and Benefits of ActivelyCooled™ NMR
Cryogen-free functioning - The NMR magnet only requires helium cryogen filling at installation and has no requirement for liquid nitrogen. The user is never required to handle or top up the cryogens.
Integration with the instrument console - In addition to improved ease of use, integration enhances the safety and control of the system in the event of a power failure. Should a power interruption occur, the magnet will be stable for a period in excess of 12 hrs and is recoverable up to that point. After this period, run down is carried out in a safe and controlled manner that does not risk damage to the magnet.
Cost savings - ActivelyCooled™ technology saves the user both the costs associated with the cryogens and their associated transport and handling costs, and system downtime.
Minimal service interval - ActivelyCooled™ systems have no moving parts in the low temperature region and are far more reliable than competing cooling technologies; ActivelyCooled™ systems can therefore run for up to 24 months between service intervals.
Potential integration improvements - current NMR systems require separate cooling sources for the magnet and the cold probe, resulting in inefficient system redundancies. In addition to the functional and cost benefits of cryogen-free operation, ActivelyCooled™ systems could potentially be used to cool a cold probe, to further simplify the cryogenic circuitry and operating procedure, as well as reduce both service and operation costs.
PTR Cooling
High resolution NMR is performed at frequencies of up to 900 MHz and relies on high-field superconducting magnets cooled by liquid helium and nitrogen. These cryogens boil off over time and need to be refilled regularly. The principle of using cryocoolers to recondense cryogens and eliminate this boil off is well established. To date, however, vibration levels have been too high for NMR. The commercial availability of pulse tube refrigerators (PTR) now provides the ability to recondense helium in an NMR system, without interfering with imaging quality.
PTR cooling is based on periodic pressure variations and displacement of helium gas within a ‘pulse tube’, a cylinder with heat exchangers at both ends. The pulse tube is connected to a pressure oscillator through a regenerator, which serves as a temporary heat storage unit. The regenerator cools incoming gas to the tube and warms outgoing gas to ambient temperature.
The PTR cooling process begins with a compression phase in which the cooled gas from the regenerator flows into the pulse tube. In a subsequent expansion phase, the temperature of the gas is further reduced thus cooling a load attached to the cold heat exchanger.
The main advantage of PTRs over Gifford-McMahon cooler designs is that they have no moving parts in the low-temperature region. Crucially for NMR applications, this means that the level of vibration is significantly reduced and the low-temperature sections have no need for maintenance in normal use.
In conjunction with an NMR magnet, the PTR system provides:
- Effective cooling power - innovative design that is effective in utilising the cooling power of the PTR for recondensation.
- Helium recondensing - users will not need to refill ActivelyCooled™ systems with liquid helium in normal operation.
- Nitrogen free operation - the nitrogen vessel normally found on NMR magnets has been eliminated, requiring only on a thermal shield cooled by the PTR. This results in a system with a smaller footprint.
- Compatible with magnetic fields - the PTR operates successfully in a magnetic field and is unaffected by magnet quenches.
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| Room Temperature Shims for NMR Magnet Systems |
| High efficiency room temperature shim systems offering finite field correction and providing optimal field homogeneity at low heat dissipation. (23 to 40 channels available.) |
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| Accessories |
| Nuclear magnetic resonance (NMR) |
| Nuclear magnetic resonance (NMR) is a non-destructive, information rich technique, which has become a critical tool, for example in the field of proteomics, where it is used to elucidate the 3-D structure of proteins. The size and complexity of large biological molecules mean that scientists require high resolution and sensitivity in order to detail them atom-by-atom. High homogeneity and stability of the magnetic field is essential to achieve this. These attributes are also key to materials science where solid state NMR provides valuable data to elucidate the structure of inorganic materials, which are insoluble and cannot be crystallized. Oxford Instruments’ superconducting magnets can take you to the limits of NMR requirements. |
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